JavaWeb_12_jdbc_改造MVC案例(登录注册)

总纲:  改造数据库应用(以前是xml现在是mysql)

1.导入数据库驱动

2.为应用创建相应的库和表

3.改造dao

4.改造service

5.使用工厂模式,即使底层换了,业务层一行代码也不用改

(因为DaoFactory是读取配置文件来产生DaoImpl的实例)

用到的第3方jar包

用到的第三方库
jaxen-1.1-beta-6.jar
jstl.jar
standard.jar
dom4j-1.6.1.jar
commons-beanutils-1.8.0.jar
commons-logging.jar
MySQL驱动:mysql-connector-java-5.0.8-bin.jar

UserDao位于dao包

package cn.itcast.dao;
import cn.itcast.domain.User;
public interface UserDao {
//操作1,添加一个用户到数据库
void add(User user);
//操作2,登录时,校验用户名和密码,正确则返回该用户
User find(String username, String password);
//操作3,注册时,检验用户名是否已存在,返回布尔值
boolean find(String username);
}

CopyOfUserDaoJdbcImpl位于dao.impl包

package cn.itcast.dao.impl;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;

import cn.itcast.dao.UserDao;
import cn.itcast.domain.User;
import cn.itcast.exception.DaoException;
import cn.itcast.utils.JdbcUtils;
/*
改造数据库应用
1.导入数据库驱动
2.为应用创建相应的库和表
3.改造dao
<user id="8881" username="weixi" password="888" email="weixi@163.com" birthday="1990-09-09" nickname="潇湘妃子"/>
mysql -uroot -proot
set character_set_client=gb2312;
set character_set_results=gb2312;
create database day14_user;
use day14_user;
create table users
(
id varchar(40) primary key,
username varchar(40) not null unique,
password varchar(40) not null,
email varchar(100) not null unique,
birthday date,
nickname varchar(40) not null
);
show tables;
*/
public class CopyOfUserDaoJdbcImpl implements UserDao {
//操作1,添加一个用户到数据库
public void add(User user){
Connection conn=null;
Statement st=null;
ResultSet rs=null;
try {
conn=JdbcUtils.getConnection();
st=conn.createStatement();//preparedStatement
String id=user.getId();
String username=user.getUsername();
String password=user.getPassword();
String email=user.getEmail();
String birthday=user.getBirthday().toLocaleString();
String nickname=user.getNickname();
String sql="insert into users(id,username,password,email,birthday,nickname) values('"+id+"','"+username+"','"+password+"','"+email+"','"+birthday+"','"+nickname+"')";
int num=st.executeUpdate(sql);
//反向推理,如果插入失败,抛异常
if (num<1) {
throw new RuntimeException("插入失败");
}
} catch (Exception e) {
// 不能抛,转型,异常链不能断
//为了方便问题出于哪一层,自定义DaoException(不能处理,继承运行时异常)
throw new DaoException(e);
}finally{
JdbcUtils.release(conn, st, rs);
}
}
//'or 1=1 or username='
//select * from users where username=''or 1=1 or username='' and password=''
//操作2,登录时,校验用户名和密码,正确则封装数据返回该用户
public User find(String username,String password){
Connection conn=null;
Statement st=null;
ResultSet rs=null;
try {
conn=JdbcUtils.getConnection();
st=conn.createStatement();//preparedStatement
String sql="select * from users where username='"+username+"' and password='"+password+"'";
rs=st.executeQuery(sql);
if (rs.next()) {
//如果找到则将数据库中的数据封装到user对象返回该user对象
User user=new User();
user.setId(rs.getString("id"));
user.setUsername(username);
user.setPassword(password);
user.setEmail(rs.getString("email"));
user.setBirthday(rs.getDate("birthday"));
user.setNickname(rs.getString("nickname"));
return user;
}
//如果没找到则返回空
return null;
} catch (Exception e) {
// 不能抛,转型,异常链不能断
//为了方便问题出于哪一层,自定义DaoException(不能处理,继承运行时异常)
throw new DaoException(e);
}finally{
JdbcUtils.release(conn, st, rs);
}
}
//操作3,注册时,检验用户名是否已存在,返回布尔值
public boolean find(String username){
Connection conn=null;
Statement st=null;
ResultSet rs=null;
try {
conn=JdbcUtils.getConnection();
st=conn.createStatement();//preparedStatement
String sql="select * from users where username='"+username+"'";
rs=st.executeQuery(sql);
if (rs.next()) {
return true;
}
return false;
} catch (Exception e) {
// 不能抛,转型,异常链不能断
//为了方便问题出于哪一层,自定义DaoException(不能处理,继承运行时异常)
throw new DaoException(e);
}finally{
JdbcUtils.release(conn, st, rs);
}
}
}
/*
select * from users where username=''or 1=1 or username='' and
password=''
mysql -uroot -proot
set character_set_client=gb2312;
set character_set_results=gb2312;
use day14_user;
select * from users where username='' or 1=1 and password=''
select * from users where username='' or 1=1 or username='' and
password=''
SQL注入:' or 1=1 or username='
*/

UserDaoJdbcImpl位于dao.impl包

package cn.itcast.dao.impl;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

import cn.itcast.dao.UserDao;
import cn.itcast.domain.User;
import cn.itcast.exception.DaoException;
import cn.itcast.utils.JdbcUtils;
/*
改造数据库应用
1.导入数据库驱动
2.为应用创建相应的库和表
3.改造dao
<user id="8881" username="weixi" password="888" email="weixi@163.com" birthday="1990-09-09" nickname="潇湘妃子"/>
mysql -uroot -proot
set character_set_client=gb2312;
set character_set_results=gb2312;
create database day14_user;
use day14_user;
create table users
(
id varchar(40) primary key,
username varchar(40) not null unique,
password varchar(40) not null,
email varchar(100) not null unique,
birthday date,
nickname varchar(40) not null
);
show tables;*/
/*statment和preparedStatement的区别:
1. preparedStatement是statement的孩子
2. preparedStatement可以防止sql注入的问题
3. preparedStatement会对sql语句进行预编译，以减轻数据库服务器的压力
java---class---jvm
sql----编译---数据库*/
public class UserDaoJdbcImpl implements UserDao {
//操作1,添加一个用户到数据库
public void add(User user){
Connection conn=null;
PreparedStatement st=null;
ResultSet rs=null;
try {
conn=JdbcUtils.getConnection();
//先准备String sql,再通过连接准备PreparedStatement
String id=user.getId();
String username=user.getUsername();
String password=user.getPassword();
String email=user.getEmail();
java.util.Date birthday=user.getBirthday();
String nickname=user.getNickname();
String sql="insert into users(id,username,password,email,birthday,nickname) values(?,?,?,?,?,?)";
st=conn.prepareStatement(sql);//preparedStatement
//将占位符填充
st.setString(1, id);
st.setString(2, username);
st.setString(3, password);
st.setString(4, email);
//需要将util.Date变成Long,再构造成sql.Date
st.setDate(5, new java.sql.Date(birthday.getTime()));
st.setString(6, nickname);
//因为已经封装好了,直接用空参执行!
int num=st.executeUpdate();
//反向推理,如果插入失败,抛异常
if (num<1) {
throw new RuntimeException("插入失败");
}
} catch (Exception e) {
// 不能抛,转型,异常链不能断
//为了方便问题出于哪一层,自定义DaoException(不能处理,继承运行时异常)
throw new DaoException(e);
}finally{
JdbcUtils.release(conn, st, rs);
}
}
//'or 1=1 or username='
//select * from users where username=''or 1=1 or username='' and password=''
//操作2,登录时,校验用户名和密码,正确则封装数据返回该用户
public User find(String username,String password){
Connection conn=null;
PreparedStatement st=null;
ResultSet rs=null;
try {
conn=JdbcUtils.getConnection();
String sql="select * from users where username=? and password=?";
st=conn.prepareStatement(sql);//preparedStatement
//将占位符替换掉!
st.setString(1, username);
st.setString(2, password);
//因为PreparedStatement已经封装好了,直接用空参执行!
rs=st.executeQuery();
if (rs.next()) {
//如果找到则将数据库中的数据封装到user对象返回该user对象
User user=new User();
user.setId(rs.getString("id"));
user.setUsername(username);
user.setPassword(password);
user.setEmail(rs.getString("email"));
user.setBirthday(rs.getDate("birthday"));
user.setNickname(rs.getString("nickname"));
return user;
}
//如果没找到则返回空
return null;
} catch (Exception e) {
// 不能抛,转型,异常链不能断
//为了方便问题出于哪一层,自定义DaoException(不能处理,继承运行时异常)
throw new DaoException(e);
}finally{
JdbcUtils.release(conn, st, rs);
}
}
//操作3,注册时,检验用户名是否已存在,返回布尔值
public boolean find(String username){
Connection conn=null;
PreparedStatement st=null;
ResultSet rs=null;
try {
conn=JdbcUtils.getConnection();
String sql="select * from users where username=?";
st=conn.prepareStatement(sql);//preparedStatement
//将占位符替换掉!
st.setString(1, username);
//因为PreparedStatement已经封装好了,直接用空参执行!
rs=st.executeQuery();
if (rs.next()) {
return true;
}
return false;
} catch (Exception e) {
// 不能抛,转型,异常链不能断
//为了方便问题出于哪一层,自定义DaoException(不能处理,继承运行时异常)
throw new DaoException(e);
}finally{
JdbcUtils.release(conn, st, rs);
}
}
}
/*
select * from users where username=''or 1=1 or username='' and
password=''
mysql -uroot -proot
set character_set_client=gb2312;
set character_set_results=gb2312;
use day14_user;
select * from users where username='' or 1=1 and password=''
select * from users where username='' or 1=1 or username='' and
password=''
SQL注入:' or 1=1 or username='
*/

UserDaoXmlImpl位于dao.impl包

package cn.itcast.dao.impl;
import java.io.IOException;
import java.text.SimpleDateFormat;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import cn.itcast.dao.UserDao;
import cn.itcast.domain.User;
import cn.itcast.utils.XmlUtils;
public class UserDaoXmlImpl implements UserDao {
//操作1,添加一个用户到数据库
public void add(User user){
try {
Document doc= XmlUtils.getDocument();
Element root=doc.getRootElement();
Element user_tag=root.addElement("user");
user_tag.setAttributeValue("id", user.getId());
user_tag.setAttributeValue("username", user.getUsername());
user_tag.setAttributeValue("password", user.getPassword());
user_tag.setAttributeValue("email", user.getEmail());
user_tag.setAttributeValue("birthday", user.getBirthday()==null?"":user.getBirthday().toLocaleString());
user_tag.setAttributeValue("nickname", user.getNickname());
XmlUtils.write2Xml(doc);
} catch (Exception e) {
// 不能抛,转型,异常链不能断
throw new RuntimeException(e);
}
}
//操作2,登录时,校验用户名和密码,正确则返回该用户
public User find(String username,String password){
try {
Document doc= XmlUtils.getDocument();
Element e= (Element) doc.selectSingleNode("//user[@username='"+username+"' and @password='"+password+"']");
if (e==null) {
return null;
}
//如果找到了,将xml中的数据封装到User里面返回
User user=new User();
user.setId(e.attributeValue("id"));
user.setUsername(e.attributeValue("username"));
user.setPassword(e.attributeValue("password"));
user.setEmail(e.attributeValue("email"));
user.setNickname(e.attributeValue("nickname"));
//封装生日的时候,需分情况讨论
String date=e.attributeValue("birthday");
if (date==null || "".equals(date)) {
user.setBirthday(null);
} else {
//注意大小写,含义不一样
SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
user.setBirthday(df.parse(date));
}
return user;
} catch (Exception e) {
// 不能抛,转型,异常链不能断
throw new RuntimeException(e);
}
}
//操作3,注册时,检验用户名是否已存在,返回布尔值
public boolean find(String username){
try {
Document doc= XmlUtils.getDocument();
Element e= (Element) doc.selectSingleNode("//user[@username='"+username+"']");
if (e==null) {
return false;
}
return true;
} catch (Exception e) {
// 不能抛,转型,异常链不能断
throw new RuntimeException(e);
}
}
}

User位于domain包

package cn.itcast.domain;
import java.util.Date;
public class User {
private String id;
private String username;
private String password;
private String email;
private Date   birthday;
private String nickname;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
}

DaoException位于exception包

package cn.itcast.exception;
public class DaoException extends RuntimeException {
//自定义Dao异常,是为了定位错误出在哪一层方便!
//运行时异常,继承RuntimeException,是不想给上层带来麻烦!
public DaoException() {
}
public DaoException(String message) {
super(message);
}
public DaoException(Throwable cause) {
super(cause);
}
public DaoException(String message, Throwable cause) {
super(message, cause);
}
public DaoException(String message, Throwable cause,
boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
}

UserExistException位于exception包

package cn.itcast.exception;
public class UserExistException extends Exception {
//继承Exception乃编译时异常,因为希望上层必须重视和处理这个情况!
public UserExistException() {
}
public UserExistException(String message) {
super(message);
}
public UserExistException(Throwable cause) {
super(cause);
}
public UserExistException(String message, Throwable cause) {
super(message, cause);
}
public UserExistException(String message, Throwable cause,
boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
}

DaoFactory位于factory包

package cn.itcast.factory;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
public class DaoFactory {
/*23种设计模式之工厂模式!
* 1,单例
* 2,读取src类目录下的dao.properties配置文件
* 3,参数为键,通过值返回接口的实现类!*/
private static Properties pro=new Properties();
//单例第1步,构造函数私有化,仅运行一次
private DaoFactory(){
//dao.properties配置文件仅加载1次就欧了
String pro_name="dao.properties";
InputStream in=DaoFactory.class.getClassLoader().getResourceAsStream(pro_name);
try {
pro.load(in);
} catch (IOException e) {
//转型后抛出
throw new RuntimeException(e);
}
}
//单例第2步,自己创个实例
private static DaoFactory instance=new DaoFactory();
//单例第3步,对外提供公开方法
public static DaoFactory getInstance(){
return instance;
}
//重点!泛型!根据参数(接口名),创建出该接口的实现类的实例对象!
public <T> T createDao(Class<T> clazz){
//配置文件中UserDao=cn.itcast.dao.impl.UserDaoJdbcImpl
//String full_name=clazz.getName();//cn.itcast.dao.UserDao
String simple_name=clazz.getSimpleName();//UserDao
//simple_name即为dao.properties配置文件键名,值impl_name就是实现类的完整名字
String impl_name=pro.getProperty(simple_name);
try {
T dao=(T) Class.forName(impl_name).newInstance();
//相当于new cn.itcast.dao.impl.UserDaoJdbcImpl()
return dao;
} catch (Exception e) {
// 转型后抛出
throw new RuntimeException(e);
}
}
}

BusinessServiceImpl位于service.impl包

package cn.itcast.service.impl;
import cn.itcast.dao.UserDao;
import cn.itcast.domain.User;
import cn.itcast.exception.UserExistException;
import cn.itcast.factory.DaoFactory;
import cn.itcast.utils.ServiceUtils;
/*对web层提供所有的服务,
* web层收到请求后,统一交给BusinessServiceImpl处理*/
public class BusinessServiceImpl {
//private UserDao dao=new UserDaoJdbcImpl();//若要解耦需要工厂模式或spring
private UserDao dao=DaoFactory.getInstance().createDao(UserDao.class);
//服务1,提供注册服务
public void register(User user) throws UserExistException{
// 先检查用户名是否存在,如果存在抛编译时异常,让调用者知道!
boolean b=dao.find(user.getUsername());
if (b) {
//如果存在,抛编译时异常(必须处理),让调用者(web层)知道(给友好提示)!
throw new UserExistException();
} else {
//如果不存在,先将密码用工具类md5加密,然后将用户添加进数据库
user.setPassword(ServiceUtils.md5(user.getPassword()));
dao.add(user);
}
}
//服务2,提供登录服务
public User login(String username,String password){
//注意查找时,要用加密后的密码找
password=ServiceUtils.md5(password);
//找不到返回null,找到了返回user
return dao.find(username, password);
}
}

JdbcUtils位于utils包

package cn.itcast.utils;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
public class JdbcUtils {
private static Properties pro=new Properties();
/*
* 静态成员Properties
* 静态代码块:加载配置文件,注册驱动
* 静态方法1:获取连接
* 静态方法2:释放连接
* 工具类的异常只管抛,也可以转型后抛
* db.properties文件位于类目录下即src
*/
static{
String pro_name="db.properties";
InputStream in=JdbcUtils.class.getClassLoader().getResourceAsStream(pro_name);
try {
pro.load(in);
Class.forName(pro.getProperty("driver"));
} catch (Exception e) {
// 静态代码块的异常只能转型后抛出
throw new ExceptionInInitializerError(e);
}
}
//方法1:获取连接
public static Connection getConnection() throws SQLException{
String url=pro.getProperty("url");
String user=pro.getProperty("user");
String password=pro.getProperty("password");
Connection conn=DriverManager.getConnection(url, user, password);
return conn;
}
//方法2:释放连接
public static void release(Connection conn,Statement st,ResultSet rs){
if (conn!=null) {
try {
conn.close();
}catch (Exception e) {
//只能记录!一旦抛出,后面的2条if代码就无法执行了
e.printStackTrace();
}
conn=null;
}
if (st!=null) {
try {
st.close();
}catch (Exception e) {
//只能记录!一旦抛出,后面的1条if代码就无法执行了
e.printStackTrace();
}
st=null;
}
if (rs!=null) {
try {
rs.close();
}catch (Exception e) {
e.printStackTrace();
}
rs=null;
}
}
}

ServiceUtils位于utils包

package cn.itcast.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import sun.misc.BASE64Encoder;
public class ServiceUtils {
public static String md5(String message){
/*工具类异常直接抛,异常链不能断
* 提供md5加密标准4步骤(生成图片验证码曾用到)*/
try {
MessageDigest md=MessageDigest.getInstance("md5");
byte[] md5=md.digest(message.getBytes());
BASE64Encoder encoder=new BASE64Encoder();
return encoder.encode(md5);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
}

WebUtils位于utils包

package cn.itcast.utils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Enumeration;
import java.util.UUID;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.Converter;
public class WebUtils {
//方法1, 将表单中的数据封装到RegisterForm里面
//使用字节码避免new 对象,使用泛形避免强转
public static <T> T request2Bean(HttpServletRequest request,Class<T> beanClass){
try{
//1.实例化要封装数据的bean
T bean = beanClass.newInstance();
//2.用BeanUtils的方法把request中的数据封装到bean对象中
Enumeration  e = request.getParameterNames();//参数列表
while(e.hasMoreElements()){
String name = (String) e.nextElement();   //username password email birthday
String value = request.getParameter(name);
BeanUtils.setProperty(bean, name, value);
}
//3,返回封装了表单数据的RegisterForm对象
return bean;
}catch (Exception e) {
throw new RuntimeException(e);
}
}
//方法2, 将RegisterForm中的数据封装到User里面
public static void copyBean(Object src,Object dest){
//需要注册日期转换器
//(将RegisterForm里的字符串转成User里的日期)
ConvertUtils.register(new Converter(){
public Object convert(Class type, Object value) {
/*方法说明：(将value转成type类型)
*1,判断value是不是null
*2,判断value是不是String
*3,判断value是不是空白字符串
*4,用SimpleDateFormat parse
*5,工具类异常统统往外抛      */
if(value==null){
return null;
}
String date=(String)value;
if("".equals(date.trim())){
return null;
}
//设计转换格式
SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
try {
return df.parse(date);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}, Date.class);
try {
//使用BeanUtils的复制bean方法
BeanUtils.copyProperties(dest, src);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
//方法3, 产生一个唯一的id(UUID.randomUUID().toString())
public static String generateId(){
return UUID.randomUUID().toString();
}
}

XmlUtils位于utils包

package cn.itcast.utils;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
public class XmlUtils {
//操作XML的精华之一!
private static String filepath;
static{
filepath=XmlUtils.class.getClassLoader().getResource("users.xml").getPath();
}
public static Document getDocument() throws DocumentException{
/*dom4j读取Document
* 工具类有异常直接抛出去*/
SAXReader reader=new SAXReader();
Document document=reader.read(new File(filepath));
return document;
}
public static void write2Xml(Document doc) throws IOException{
//dom4j写入Xml
OutputFormat format=OutputFormat.createPrettyPrint();
format.setEncoding("UTF-8");
XMLWriter writer=new XMLWriter(new FileOutputStream(filepath),format);
writer.write(doc);
writer.close();
}
}

ImageServlet位于web.controller包

package cn.itcast.web.controller;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ImageServlet extends HttpServlet {
private static final int WIDTH=120;
private static final int HEIGHT=30;
private static final int IMAGETYPE=BufferedImage.TYPE_INT_RGB;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//内存里的图像
BufferedImage image=new BufferedImage(WIDTH,HEIGHT,IMAGETYPE);
Graphics g=image.getGraphics();
//设置背景色
setBackground(g);
//设置边框
setBorder(g);
//设置干扰线
setLine(g);
//设置汉字，需要旋转，强转为Graphics2D
String random=setCode((Graphics2D) g);
//要在服务器也存一份
request.getSession().setAttribute("s_checkcode", random);
//设置不要缓存，告知是图片，并写给浏览器
response.setDateHeader("expires", -1);
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Prama", "no-cache");
response.setContentType("image/jpeg");
ImageIO.write(image, "jpg", response.getOutputStream());
}
private String setCode(Graphics2D g) {
/*方法说明：
*生成随机汉字如：林黛玉薛宝钗史湘云
*/
g.setColor(Color.RED);
g.setFont(new Font("宋体",Font.BOLD,20));
StringBuffer sb=new StringBuffer();
String base="\u7684\u4e00\u4e86\u662f\u6211\u4e0d\u5728\u4eba\u4eec\u6709\u6765\u4ed6\u8fd9\u4e0a\u7740\u4e2a\u5730\u5230\u5927\u91cc\u8bf4\u5c31\u53bb\u5b50\u5f97\u4e5f\u548c\u90a3\u8981\u4e0b\u770b\u5929\u65f6\u8fc7\u51fa\u5c0f\u4e48\u8d77\u4f60\u90fd\u628a\u597d\u8fd8\u591a\u6ca1\u4e3a\u53c8\u53ef\u5bb6\u5b66\u53ea\u4ee5\u4e3b\u4f1a\u6837\u5e74\u60f3\u751f\u540c\u8001\u4e2d\u5341\u4ece\u81ea\u9762\u524d\u5934\u9053\u5b83\u540e\u7136\u8d70\u5f88\u50cf\u89c1\u4e24\u7528\u5979\u56fd\u52a8\u8fdb\u6210\u56de\u4ec0\u8fb9\u4f5c\u5bf9\u5f00\u800c\u5df1\u4e9b\u73b0\u5c71\u6c11\u5019\u7ecf\u53d1\u5de5\u5411\u4e8b\u547d\u7ed9\u957f\u6c34\u51e0\u4e49\u4e09\u58f0\u4e8e\u9ad8\u624b\u77e5\u7406\u773c\u5fd7\u70b9\u5fc3\u6218\u4e8c\u95ee\u4f46\u8eab\u65b9\u5b9e\u5403\u505a\u53eb\u5f53\u4f4f\u542c\u9769\u6253\u5462\u771f\u5168\u624d\u56db\u5df2\u6240\u654c\u4e4b\u6700\u5149\u4ea7\u60c5\u8def\u5206\u603b\u6761\u767d\u8bdd\u4e1c\u5e2d\u6b21\u4eb2\u5982\u88ab\u82b1\u53e3\u653e\u513f\u5e38\u6c14\u4e94\u7b2c\u4f7f\u5199\u519b\u5427\u6587\u8fd0\u518d\u679c\u600e\u5b9a\u8bb8\u5feb\u660e\u884c\u56e0\u522b\u98de\u5916\u6811\u7269\u6d3b\u90e8\u95e8\u65e0\u5f80\u8239\u671b\u65b0\u5e26\u961f\u5148\u529b\u5b8c\u5374\u7ad9\u4ee3\u5458\u673a\u66f4\u4e5d\u60a8\u6bcf\u98ce\u7ea7\u8ddf\u7b11\u554a\u5b69\u4e07\u5c11\u76f4\u610f\u591c\u6bd4\u9636\u8fde\u8f66\u91cd\u4fbf\u6597\u9a6c\u54ea\u5316\u592a\u6307\u53d8\u793e\u4f3c\u58eb\u8005\u5e72\u77f3\u6ee1\u65e5\u51b3\u767e\u539f\u62ff\u7fa4\u7a76\u5404\u516d\u672c\u601d\u89e3\u7acb\u6cb3\u6751\u516b\u96be\u65e9\u8bba\u5417\u6839\u5171\u8ba9\u76f8\u7814\u4eca\u5176\u4e66\u5750\u63a5\u5e94\u5173\u4fe1\u89c9\u6b65\u53cd\u5904\u8bb0\u5c06\u5343\u627e\u4e89\u9886\u6216\u5e08\u7ed3\u5757\u8dd1\u8c01\u8349\u8d8a\u5b57\u52a0\u811a\u7d27\u7231\u7b49\u4e60\u9635\u6015\u6708\u9752\u534a\u706b\u6cd5\u9898\u5efa\u8d76\u4f4d\u5531\u6d77\u4e03\u5973\u4efb\u4ef6\u611f\u51c6\u5f20\u56e2\u5c4b\u79bb\u8272\u8138\u7247\u79d1\u5012\u775b\u5229\u4e16\u521a\u4e14\u7531\u9001\u5207\u661f\u5bfc\u665a\u8868\u591f\u6574\u8ba4\u54cd\u96ea\u6d41\u672a\u573a\u8be5\u5e76\u5e95\u6df1\u523b\u5e73\u4f1f\u5fd9\u63d0\u786e\u8fd1\u4eae\u8f7b\u8bb2\u519c\u53e4\u9ed1\u544a\u754c\u62c9\u540d\u5440\u571f\u6e05\u9633\u7167\u529e\u53f2\u6539\u5386\u8f6c\u753b\u9020\u5634\u6b64\u6cbb\u5317\u5fc5\u670d\u96e8\u7a7f\u5185\u8bc6\u9a8c\u4f20\u4e1a\u83dc\u722c\u7761\u5174\u5f62\u91cf\u54b1\u89c2\u82e6\u4f53\u4f17\u901a\u51b2\u5408\u7834\u53cb\u5ea6\u672f\u996d\u516c\u65c1\u623f\u6781\u5357\u67aa\u8bfb\u6c99\u5c81\u7ebf\u91ce\u575a\u7a7a\u6536\u7b97\u81f3\u653f\u57ce\u52b3\u843d\u94b1\u7279\u56f4\u5f1f\u80dc\u6559\u70ed\u5c55\u5305\u6b4c\u7c7b\u6e10\u5f3a\u6570\u4e61\u547c\u6027\u97f3\u7b54\u54e5\u9645\u65e7\u795e\u5ea7\u7ae0\u5e2e\u5566\u53d7\u7cfb\u4ee4\u8df3\u975e\u4f55\u725b\u53d6\u5165\u5cb8\u6562\u6389\u5ffd\u79cd\u88c5\u9876\u6025\u6797\u505c\u606f\u53e5\u533a\u8863\u822c\u62a5\u53f6\u538b\u6162\u53d4\u80cc\u7ec6";
int x=5;//首个汉字 偏离边框的距离
for (int i = 0; i < 4; i++) {//生成4个汉字
int degree=new Random().nextInt()%30;//-30~30度
String ch=base.charAt(new Random().nextInt(base.length()))+"";
sb.append(ch);
g.rotate(degree*Math.PI/180, x, 20);//Graphics2D的方法
g.drawString(ch, x, 20);
g.rotate(-degree*Math.PI/180, x, 20);//写下个字前角度还原
x+=30;//字宽20 间距为10
}
return sb.toString();
}
private void setLine(Graphics g) {
g.setColor(Color.GREEN);
for (int i = 0; i < 5; i++) {
int x1=new Random().nextInt(WIDTH);
int y1=new Random().nextInt(HEIGHT);
int x2=new Random().nextInt(WIDTH);
int y2=new Random().nextInt(HEIGHT);
g.drawLine(x1, y1, x2, y2);//两个端点需在矩形框内
}
}
private void setBorder(Graphics g) {
g.setColor(Color.BLUE);
g.drawRect(0, 0, WIDTH-1, HEIGHT-1);
}
private void setBackground(Graphics g) {
g.setColor(Color.WHITE);
g.fillRect(0, 0, WIDTH, HEIGHT);
}
}

LoginServlet位于web.controller包

package cn.itcast.web.controller;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.itcast.domain.User;
import cn.itcast.service.impl.BusinessServiceImpl;
public class LoginServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
BusinessServiceImpl service = new BusinessServiceImpl();
User user = service.login(username, password);
if(user!=null){
//session中存入登录成功的标记
request.getSession().setAttribute("user", user);
//让用户登陆成功后，跳转首页
//得到web应用所在目录day09
String url=request.getContextPath();
response.sendRedirect(url+ "/index.jsp");
return;
}
request.setAttribute("message", "用户名或密码错误！！");
request.getRequestDispatcher("/message.jsp").forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

LogoutServlet位于web.controller包

package cn.itcast.web.controller;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class LogoutServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession(false);
if(session!=null){
session.removeAttribute("user");
}
//注销成功，跳到全局消息显示页面，显示注销成功消息
//并控制消息显示页面过3秒后跳转到首页
//实用的跳转技术
String url=request.getContextPath();//day04
request.setAttribute("message", "注销成功,浏览器将在3秒后跳转至首页<meta http-equiv='refresh' content='3;url="+url+"/index.jsp'>");
request.getRequestDispatcher("/message.jsp").forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

RegisterServlet位于web.controller包

package cn.itcast.web.controller;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.itcast.domain.User;
import cn.itcast.exception.UserExistException;
import cn.itcast.service.impl.BusinessServiceImpl;
import cn.itcast.utils.WebUtils;
import cn.itcast.web.formbean.RegisterForm;
public class RegisterServlet extends HttpServlet {
//处理用户注册请求
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//首先解决post提交上来的中文乱码问题
request.setCharacterEncoding("UTF-8");
//1.把表单数据封装到RegisterForm对象,对提交表单的字段进行合法性校验
//注意要把服务器的验证码封装到RegisterForm,以供校验
RegisterForm form=WebUtils.request2Bean(request, RegisterForm.class);
String s_checkcode=(String) request.getSession().getAttribute("s_checkcode");
form.setS_checkcode(s_checkcode);
boolean b=form.validate();
//2.如果校验失败，跳回到表单页面，回显校验失败信息
if(!b){
request.setAttribute("form", form);
request.getRequestDispatcher("/WEB-INF/jsp/register.jsp").forward(request, response);
return;
}
//3.如果校验成功，则调用service处理注册请求
//(将RegisterForm里面的字符数据全放到User里)
User user=new User();
WebUtils.copyBean(form, user);
user.setId(WebUtils.generateId());
BusinessServiceImpl service=new BusinessServiceImpl();
try {
service.register(user);
//成功,跳转到网站的全局消息显示页
//session中存入登录成功的标记
request.getSession().setAttribute("user", user);
String url=request.getContextPath();
request.setAttribute("message", "恭喜您，注册成功！！浏览器将在3秒后跳转至首页<meta http-equiv='refresh' content='3;url="+url+"/index.jsp'>");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return;
} catch (UserExistException e) {
//注册用户已存在则跳回到注册页面，显示注册用户已存在的消息
form.getErrors().put("username", "注册的用户名已存在！！");
request.setAttribute("form", form);
request.getRequestDispatcher("/WEB-INF/jsp/register.jsp").forward(request, response);
return;
}catch(Exception e){
//抓住其他的问题
e.printStackTrace();
request.setAttribute("message", "服务器出现未知错误！！！");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return;
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

RegisterForm位于web.formbean包

package cn.itcast.web.formbean;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;
public class RegisterForm {
/*用一个类封装表单提交过来的数据
* 表单提交过来全是String */
private String username;
private String password;
private String password2;
private String email;
private String birthday;
private String nickname;
private String c_checkcode;
private String s_checkcode;
// Map errors  保存所有校验不通过的错误消息
private Map errors = new HashMap();
public boolean validate(){
//默认是真,只要有一个错误,flag为假
boolean flag = true;
//用户名不能为空，并且要是3-8位字母
if(this.username==null || this.username.trim().equals("")){
flag = false;
errors.put("username", "用户名不能为空!");
}else{
if(!this.username.matches("[A-Za-z]{3,8}")){
flag = false;
errors.put("username", "用户名必须是3-8位字母!");
}
}
//密码不能为空，并且是3-8位数字
if(this.password==null || this.password.trim().equals("")){
flag = false;
errors.put("password", "密码不能为空!");
}else{
if(!this.password.matches("\\d{3,8}")){
flag = false;
errors.put("password", "密码必须是3-8位数字!");
}
}
//确认密码不能为空，并且要和一次一致
if(this.password2==null || this.password2.trim().equals("")){
flag = false;
errors.put("password2", "确认密码不能为空!");
}else{
if(!this.password.equals(this.password2)){
flag = false;
errors.put("password2", "两次密码必须一致!");
}
}
//电子邮箱不能为空，并且要是一个格式合法的邮箱
if(this.email==null || this.email.trim().equals("")){
flag = false;
errors.put("email", "邮箱不能为空!");
}else{
if(!this.email.matches("\\w+@\\w+(\\.\\w+)+")){
flag = false;
errors.put("email", "邮箱格式错误!");
}
}
/*生日可以为空，不为空时，必须要是一个日期
* 不能用SimpleDateFormat因为12月32日会转成第2年的
* 可以使用BeanUtils里面的DateLocaleConverter
* 日期错误转不了,就会抛异常!
*/
if(this.birthday!=null && !this.birthday.trim().equals("")){
try{
DateLocaleConverter conv= new DateLocaleConverter();
conv.convert(this.birthday, "yyyy-MM-dd");
}catch (Exception e) {
flag = false;
errors.put("birthday", "日期格式不对!");
}
}
//昵称不可以为空，并且要是汉字区间(\u4e00-\u9fa5)
if(this.nickname==null || this.nickname.trim().equals("")){
flag = false;
errors.put("nickname", "昵称不能为空!");
}else{  //[^\u4e00-\u9fa5]*
if(!this.nickname.matches("^([\u4e00-\u9fa5]+)$")){
flag = false;
errors.put("nickname", "呢称必须是汉字!");
}
}
//客户端提交的验证码不可以为空
if(c_checkcode==null || this.c_checkcode.trim().equals("")){
flag = false;
errors.put("c_checkcode", "必须输入认证码!");
}else{
if(!this.c_checkcode.equals(this.s_checkcode)){
flag = false;
errors.put("c_checkcode", "认证码错误!");
}
}
return flag;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getPassword2() {
return password2;
}
public void setPassword2(String password2) {
this.password2 = password2;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getBirthday() {
return birthday;
}
public void setBirthday(String birthday) {
this.birthday = birthday;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
public String getC_checkcode() {
return c_checkcode;
}
public void setC_checkcode(String c_checkcode) {
this.c_checkcode = c_checkcode;
}
public String getS_checkcode() {
return s_checkcode;
}
public void setS_checkcode(String s_checkcode) {
this.s_checkcode = s_checkcode;
}
public Map getErrors() {
return errors;
}
public void setErrors(Map errors) {
this.errors = errors;
}
}

LoginUIServlet位于web.UI包

package cn.itcast.web.UI;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginUIServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//为用户转到登录页面login.jsp
request.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

RegisterUIServlet位于web.UI包

package cn.itcast.web.UI;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RegisterUIServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//为用户转到注册页面register.jsp
request.getRequestDispatcher("/WEB-INF/jsp/register.jsp").forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

dao.properties位于src类目录下

UserDao=cn.itcast.dao.impl.UserDaoJdbcImpl
#UserDao=cn.itcast.dao.impl.UserDaoXmlImpl

db.properties位于src类目录下

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/day14_user?useUnicode=true&characterEncoding=utf-8
user=root
password=root
#driver=oracle.jdbc.driver.OracleDriver
#url=jdbc:oracle:thin:@localhost:1521:orcl
#user=system
#password=itcast

Users.xml位于src类目录下

<?xml version="1.0" encoding="UTF-8"?>
<users>
<user id="95a08f25-ad11-4f69-8b37-65e21b809e50" username="tanchun" password="4QrcOUm6Wau+VuBX8g+IPg==" email="weixi@163.com" birthday="1990-09-09" nickname="探春"/>
</users>

index.jsp位于WebRoot目录下

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>网站首页</title>
</head>
<body>
<c:if test="${user!=null}">
欢迎您:${user.nickname }
<a href="${pageContext.request.contextPath }/servlet/LogoutServlet">注销</a>
</c:if>

<c:if test="${user==null}">
<a href="${pageContext.request.contextPath }/servlet/LoginUIServlet">登录</a>
<a href="${pageContext.request.contextPath }/servlet/RegisterUIServlet">注册</a>
</c:if>
总纲:  改造数据库应用
1.导入数据库驱动
2.为应用创建相应的库和表
3.改造dao
<user id="8881" username="weixi" password="888" email="weixi@163.com" birthday="1990-09-09" nickname="潇湘妃子"/>

mysql -uroot -proot
set character_set_client=gb2312;
set character_set_results=gb2312;
create database day14_user;
use day14_user;
create table users
(
id varchar(40) primary key,
username varchar(40) not null unique,
password varchar(40) not null,
email varchar(100) not null unique,
birthday date,
nickname varchar(40) not null
);
show tables;

</body>
</html>

message.jsp位于WebRoot目录下

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>您有新的消息,请注意查收</title>
</head>
<body>
${message }
</body>
</html>

ShowCalendar.js位于WebRoot/js目录下(千万别放到WEB-INF)

// 日期选择
// By Ziyue(http://www.web-v.com/)
// 使用方法：
// <script type="text/javascript" src="${pageContext.request.contextPath }/js/ShowCalendar.js"></script>
// <input name="birthday" type="text" id="birthday" title="点击选择" onClick="showCalendar(this.id)">

var today;
document.writeln("<div id='Calendar' style='position:absolute; z-index:1; visibility: hidden; filter:\"progid:DXImageTransform.Microsoft.Shadow(direction=135,color=#999999,strength=3)\"'></div>");

function getDays(month, year)
{
var daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
//下面的这段代码是判断当前是否是闰年的
if (1 == month)
return ((0 == year % 4) && (0 != (year % 100))) || (0 == year % 400) ? 29 : 28;
else
return daysInMonth[month];
}

function getToday()
{
//得到今天的年,月,日
this.now = new Date();
this.year = this.now.getFullYear();
this.month = this.now.getMonth();
this.day = this.now.getDate();
}

function getStringDay(str)
{
//得到输入框的年,月,日
var str=str.split("-")

this.now = new Date(parseFloat(str[0]),parseFloat(str[1])-1,parseFloat(str[2]));
this.year = this.now.getFullYear();
this.month = this.now.getMonth();
this.day = this.now.getDate();
}

function newCalendar() {
var parseYear = parseInt(document.all.Year.options[document.all.Year.selectedIndex].value);
var newCal = new Date(parseYear, document.all.Month.selectedIndex, 1);
var day = -1;
var startDay = newCal.getDay();
var daily = 0;

if ((today.year == newCal.getFullYear()) &&(today.month == newCal.getMonth()))
day = today.day;

var tableCal = document.all.calendar;
var intDaysInMonth =getDays(newCal.getMonth(), newCal.getFullYear());

for (var intWeek = 1; intWeek < tableCal.rows.length;intWeek++)
for (var intDay = 0;intDay < tableCal.rows[intWeek].cells.length;intDay++)
{
var cell = tableCal.rows[intWeek].cells[intDay];
if ((intDay == startDay) && (0 == daily))
daily = 1;

if(day==daily) //今天，调用今天的Class
{
cell.style.background='#6699CC';
cell.style.color='#FFFFFF';
//cell.style.fontWeight='bold';
}
else if(intDay==6) //周六
cell.style.color='green';
else if (intDay==0) //周日
cell.style.color='red';

if ((daily > 0) && (daily <= intDaysInMonth))
{
cell.innerText = daily;
daily++;
}
else
cell.innerText = "";
}
}

function GetDate(InputBox)
{
var sDate;
//这段代码处理鼠标点击的情况
if (event.srcElement.tagName == "TD")
if (event.srcElement.innerText != "")
{
sDate = document.all.Year.value + "-" + document.all.Month.value + "-" + event.srcElement.innerText;
eval("document.all."+InputBox).value=sDate;
HiddenCalendar();
}
}

function HiddenCalendar()
{
//关闭选择窗口
document.all.Calendar.style.visibility='hidden';
}

function showCalendar(InputBox)
{
var months = new Array("一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月");
var days = new Array("日","一", "二", "三", "四", "五", "六");

var x,y,intLoop,intWeeks,intDays;
var DivContent;
var year,month,day;
var o=eval("document.all."+InputBox);
var thisyear; //真正的今年年份

thisyear=new getToday();
thisyear=thisyear.year;

today = o.value;
if(isDate(today))
today = new getStringDay(today);
else
today = new getToday();

//显示的位置
x=o.offsetLeft;
y=o.offsetTop;
while(o=o.offsetParent)
{
x+=o.offsetLeft;
y+=o.offsetTop;
}
document.all.Calendar.style.left=x+2;
document.all.Calendar.style.top=y+20;
document.all.Calendar.style.visibility="visible";

//下面开始输出日历表格(border-color:#9DBAF7)
DivContent="<table border='0' cellspacing='0' style='border:1px solid #0066FF; background-color:#EDF2FC'>";
DivContent+="<tr>";
DivContent+="<td style='border-bottom:1px solid #0066FF; background-color:#C7D8FA'>";

//年
DivContent+="<select name='Year' id='Year' onChange='newCalendar()' style='font-family:Verdana; font-size:12px'>";
for (intLoop = thisyear - 35; intLoop < (thisyear + 2); intLoop++)
DivContent+="<option value= " + intLoop + " " + (today.year == intLoop ? "Selected" : "") + ">" + intLoop + "</option>";
DivContent+="</select>";

//月
DivContent+="<select name='Month' id='Month' onChange='newCalendar()' style='font-family:Verdana; font-size:12px'>";
for (intLoop = 0; intLoop < months.length; intLoop++)
DivContent+="<option value= " + (intLoop + 1) + " " + (today.month == intLoop ? "Selected" : "") + ">" + months[intLoop] + "</option>";
DivContent+="</select>";

DivContent+="</td>";

DivContent+="<td style='border-bottom:1px solid #0066FF; background-color:#C7D8FA; font-weight:bold; font-family:Wingdings 2,Wingdings,Webdings; font-size:16px; padding-top:2px; color:#4477FF; cursor:hand' align='center' title='关闭' onClick='javascript:HiddenCalendar()'>S</td>";
DivContent+="</tr>";

DivContent+="<tr><td align='center' colspan='2'>";
DivContent+="<table id='calendar' border='0' width='100%'>";

//星期
DivContent+="<tr>";
for (intLoop = 0; intLoop < days.length; intLoop++)
DivContent+="<td align='center' style='font-size:12px'>" + days[intLoop] + "</td>";
DivContent+="</tr>";

//天
for (intWeeks = 0; intWeeks < 6; intWeeks++)
{
DivContent+="<tr>";
for (intDays = 0; intDays < days.length; intDays++)
DivContent+="<td onClick='GetDate(\"" + InputBox + "\")' style='cursor:hand; border-right:1px solid #BBBBBB; border-bottom:1px solid #BBBBBB; color:#215DC6; font-family:Verdana; font-size:12px' align='center'></td>";
DivContent+="</tr>";
}
DivContent+="</table></td></tr></table>";

document.all.Calendar.innerHTML=DivContent;
newCalendar();
}

function isDate(dateStr)
{
var datePat = /^(\d{4})(\-)(\d{1,2})(\-)(\d{1,2})$/;
var matchArray = dateStr.match(datePat);
if (matchArray == null) return false;
var month = matchArray[3];
var day = matchArray[5];
var year = matchArray[1];
if (month < 1 || month > 12) return false;
if (day < 1 || day > 31) return false;
if ((month==4 || month==6 || month==9 || month==11) && day==31) return false;
if (month == 2)
{
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day > 29 || (day==29 && !isleap)) return false;
}
return true;
}

login.jsp位于WebRoot/WEB-INF/JSP目录下

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登陆界面</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/servlet/LoginServlet" method="post">
用户：<input type="text" name="username" />
密码：<input type="password" name="password" />
<input type="submit" value="登陆" />
<input type="button" value="注册" onclick="window.location.href='${pageContext.request.contextPath }/servlet/RegisterUIServlet'" />
</form>
</body>
</html>

register.jsp位于WebRoot/WEB-INF/JSP目录下

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>用户注册</title>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/ShowCalendar.js"></script>
</head>
<body>
<h3>注册须知：</h3>
1:在本站注册的会员，必须遵守《互联网电子公告服务管理规定》，不得在本站发表诽谤他人，侵犯他人隐私，侵犯他人知识产权，传播病毒，政治言论，商业机密等信息。
<form action="${pageContext.request.contextPath }/servlet/RegisterServlet" method="post">
<table>
<tr>
<td >登陆帐号：</td>
<td>
<input  type="text" name="username" value="${form.username }">
<span >${form.errors.username }</span>
</td>
</tr>
<tr>
<td >重复密码：</td>
<td>
<input  type="password" name="password" value="${form.password }">
<span >${form.errors.password }</span>
</td>
</tr>
<tr>
<td >确认密码：</td>
<td>
<input  type="password" name="password2"  value="${form.password2 }">
<span >${form.errors.password2 }</span>
</td>
</tr>
<tr>
<td >电子邮箱：</td>
<td>
<input  type="text" name="email"  value="${form.email }">
<span >${form.errors.email }</span>
</td>
</tr>
<tr>
<td >生日：</td>
<td>
<input  type="text" name="birthday" id="birthday" title="点击选择" onClick="showCalendar(this.id)" value="${form.birthday }">
<span >${form.errors.birthday }</span>
</td>
</tr>
<tr>
<td >您的呢称：</td>
<td>
<input  type="text" name="nickname" value="${form.nickname }">
<span >${form.errors.nickname }</span>
</td>
</tr>
<tr>
<td >图片认证：</td>
<td>
<input  type="text" name="c_checkcode">
<span >${form.errors.c_checkcode }</span>
<img src="${pageContext.request.contextPath }/servlet/ImageServlet" height="25px" width="120px" alt="看不清" style="cursor: hand;" onclick="this.src=this.src+'?'+Math.random().toString().substr(2,3)">
</td>
</tr>
</table>
<span><input class="btn" type="reset" name="reset" value="重 置"></span>
<span><input class="btn" type="submit" name="submit" value="注 册"></span>
</form>
</body>
</html>