javaee学习之路(二十)JDBC项目实战--员工信息存储系统
2015-03-31 13:31
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员工信息存储系统
第一部分、录入
1、整体架构图
2、建表
3、add.jsp
4、Employee.java
5、AddServlet.java
6、DaoEmployee.java
7、DaoEmployeeImpl.java
8、DaoFactory.java
9、DBManager.java
10、TestDaoEmployee.java
第二部分、编辑、更新
1、ListServlet.java
2、list.jsp
3、DaoEmployee.java
4、DaoEmployeeImpl.java
5、TestDaoEmployee.java
6、EditServlet.java
7、edit.jsp
8、UpdateServlet.java
第三部分、查询
1、left.jsp
2、list.jsp
3、ListConditionServlet.java
4、SearchEmployee.java
5、DaoEmployee.java
6、DaoEmployeeImpl.java
7、TestEmployee.java
8、listCondition.jsp
第一部分、录入
1、整体架构图
2、建表
3、add.jsp
<%@ 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>
<meta http-equiv="content-type" content="html/text;charset=utf-8"/>
<script language="javascript" src="${pageContext.request.contextPath}/js/Calendar.js">
</script>
</head>
<body>
${errorInfo}
<div id="body">
<div id="table">
<form name="form1" action="${pageContext.request.contextPath}/servlet/AddServlet" method="post">
<table>
<tr>
<td class="td1">*用户名：</td>
<td class="td2"><input type="text" size="40%" maxlength="20" name="username"></td>
</tr>
…….
<tr>
<td class="td1">性别：</td>
<td class="td2">
<input type=radio name="sex" value="男">男
<input type=radio name="sex" value="女" checked>女
</td>
</tr>
<tr>
<td class="td1">出生日期：</td>
<td class="td2">
<input type="text" id="time" name="birthday" value="1990-01-01">
<input type="button" onClick="MyCalendar.SetDate(this,document.getElementById('time'))" value="选择"/>
</td>
</tr>
<tr>
<td class="td1">学历：</td>
<td class="td2">
<select name="edu">
<option value="博士">博士</option>
<option value="硕士">硕士</option>
<option value="本科生">本科生</option>
<option value="大专">大专</option>
<option value="中专">中专</option>
<option value="高中">高中</option>
</select>
</td>
</tr>
……
<tr>
<td class="td1">入职时间：</td>
<td class="td2">
<input type="text" name="hiredate" id="time1" value="2000-01-01">
<input type="button" onClick="MyCalendar.SetDate(this,document.getElementById('time1'))" value="选择"/>
</td>
</tr>
……
<tr>
<td>
<div id="que">
<input type="button" size="10%" value="提交" onclick="save()">
</div>
</td>
<td>
<div id="chong">
<input type="reset" size="10%" value="重置">
</div>
</td>
</tr>
</table>
</form>
<script type="text/javascript">
function save(){
//forms表示此页面的form集合(从上往下)，是javascript的内置对象
// alert(document.forms[0].action);
//提交表单
document.forms[0].submit();
}
</script>
……4、Employee.java
package cn.itcast.bean;
import java.sql.Date;
public class Employee {
private Integer id;
private String username;
private String password;
private String realname;
private String sex;
private Date birthday;
private String edu;
private String major;
private String description;
private Date hiredate;
private String role;
……5、AddServlet.java
package cn.itcast.web;
import *;
public class AddServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws Exception {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset:UTF-8");
PrintWriter out=response.getWriter();
//System.out.println("AddServlet*********");
String path="";
try{
//获取表单数据
String username=request.getParameter("username");
String password=request.getParameter("pasw");
String realname=request.getParameter("realname");
String sex=request.getParameter("sex");
String sbirthday=request.getParameter("birthday");
String edu=request.getParameter("edu");
String major=request.getParameter("major");
String description=request.getParameter("description");
String shiredate=request.getParameter("hiredate");
String role=request.getParameter("role");
//封装到javabean中
Employee employee=new Employee();
employee.setUsername(username);
employee.setPassword(password);
employee.setRealname(realname);
employee.setSex(sex);
employee.setEdu(edu);
employee.setMajor(major);
employee.setDescription(description);
employee.setRole(role);
//处理日期(""和格式书写正确)
Date birthday=null;
Date hiredate=null;
if(sbirthday!=null&& !("".equals(sbirthday.trim()))){
birthday=java.sql.Date.valueOf(sbirthday.trim());
}
if(shiredate!=null&& !("".equals(shiredate.trim()))){
hiredate=java.sql.Date.valueOf(shiredate.trim());
}
employee.setBirthday(birthday);
employee.setHiredate(hiredate);
//调用工厂获取dao层对象
DaoEmployee daoEmployee=DaoFactory.getDaoEmployee();
//调用dao保存员工信息的方法
daoEmployee.saveEmployee(employee);
path="/employees/add.jsp";
request.setAttribute("errorInfo", "您的数据保存成功，请继续录入!");
}catch(Exception e){
e.printStackTrace();
path="/error.jsp";
request.setAttribute("errorMsg", "日期转换异常");
}
//转发
request.getRequestDispatcher(path).forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}6、DaoEmployee.java
package cn.itcast.dao;
import cn.itcast.bean.Employee;
public interface DaoEmployee {
/*
* 保存员工信息到数据库中
*/
void saveEmployee(Employee employee);
}7、DaoEmployeeImpl.java
package cn.itcast.daoIml;
import *;
public class DaoEmployeeImpl implements DaoEmployee {
public void saveEmployee(Employee employee) {
Connection conn=null;
PreparedStatement pstatement=null;
DBManager dbManager=new DBManager();
conn=dbManager.getConnection();
//组织SQL语句
String sql="INSERT INTO employees (id,username,pasw,realname,sex,birthday,edu,major,des," +
"hiredate,role) values(null,?,?,?,?,?,?,?,?,?,?)";
try {
pstatement=conn.prepareStatement(sql);
pstatement.setString(1, employee.getUsername());
pstatement.setString(2, employee.getPassword());
pstatement.setString(3, employee.getRealname());
pstatement.setString(4, employee.getSex());
pstatement.setDate(5, employee.getBirthday());
pstatement.setString(6, employee.getEdu());
pstatement.setString(7, employee.getMajor());
pstatement.setString(8, employee.getDescription());
pstatement.setDate(9, employee.getHiredate());
pstatement.setString(10, employee.getRole());
pstatement.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(dbManager!=null){
dbManager.closeResource(conn, pstatement, null);
}
}
}
}8、DaoFactory.java
package fn.itcast.factory;
import cn.itcast.dao.DaoEmployee;
import cn.itcast.daoIml.DaoEmployeeImpl;
/*
* 工厂类 简单工厂 获取DaoEmployee接口对象
*/
public class DaoFactory {
public static DaoEmployee getDaoEmployee(){
return new DaoEmployeeImpl();
}
}9、DBManager.java
package cn.itcast.util;
import *;
//数据库管理类
public class DBManager {
private String className="com.mysql.jdbc.Driver";
private String username="root";
private String password="root";
private String url="jdbc:mysql://localhost:3306/test";
//1.注册驱动
public DBManager(){
try {
Class.forName(className);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//2.获取连接
public Connection getConnection(){
Connection conn=null;
try {
conn=DriverManager.getConnection(url, username, password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
//3.关闭资源
public void closeResource(Connection conn,Statement statement,ResultSet rs){
try {
if(rs!=null){
rs.close();
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
if(statement!=null){
statement.close();
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
if(conn!=null){
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}10、TestDaoEmployee.java
package cn.itcast.test;
import *;
public class TestDaoEmployee {
static DaoEmployee daoEmployee;
@BeforeClass public static void beforeClass(){
daoEmployee=DaoFactory.getDaoEmployee();
}
@Test public void save(){
//模拟数据
Employee employee=new Employee();
employee.setUsername("fandong");
employee.setPassword("111");
employee.setRealname("发到");
employee.setSex("男");
employee.setBirthday(java.sql.Date.valueOf("1990-09-08"));
employee.setEdu("大专");
employee.setMajor("电子");
employee.setDescription("很好");
employee.setHiredate(java.sql.Date.valueOf("1990-09-09"));
employee.setRole("经理");
daoEmployee.saveEmployee(employee);
}
}第二部分、编辑、更新
1、ListServlet.java
package cn.itcast.web;
import *;
public class ListServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws Exception {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
String path="";
//获取dao对象
DaoEmployee daoEmployee=DaoFactory.getDaoEmployee();
List<Employee> list = daoEmployee.findAllEmployees();
request.setAttribute("list", list);
path="/employees/list.jsp";
request.getRequestDispatcher(path).forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}2、list.jsp
<%@ 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>
<meta http-equiv="content-type" content="html/text;charset=utf-8"/>
<script language="javascript" src="Calendar.js">
</script>
</head>
<body>
<div id="body">
<div id="table">
<c:choose>
<c:when test="${!empty list}">
<table border="1">
<tr>
<td><div class="td1">用户名</div></td>
<td><div class="td1">密码</div></td>
<td><div class="td1">真实姓名</div></td>
<td><div class="td1">性别</div></td>
<td><div class="td1">出生日期</div></td>
<td><div class="td1">学历</div></td>
<td><div class="td1">专业</div></td>
<td><div class="td1">职位描述</div></td>
<td><div class="td1">入职时间</div></td>
<td><div class="td1">所属角色</div></td>
<td><div class="td1" colspan="3">操作</div></td>
</tr>
<c:forEach items="${list}" var="employee">
<tr>
<td>${employee.username}</td>
<td>${employee.password}</td>
<td>${employee.realname}</td>
<td>${employee.sex}</td>
<td>${employee.birthday}</td>
<td>${employee.edu}</td>
<td>${employee.major}</td>
<td>${employee.description}</td>
<td>${employee.hiredate}</td>
<td>${employee.role}</td>
<td>
<a href="">查看</a>
<a href="${pageContext.request.contextPath}/servlet/EditServlet?id=${employee.id}">编辑</a>
<a href="">删除</a>
</td>
</tr>
</c:forEach>
</table>
</c:when>
<c:otherwise>
没有您要查询的数据!!!
</c:otherwise>
</c:choose>
……3、DaoEmployee.java
package cn.itcast.dao;
import java.util.List;
import cn.itcast.bean.Employee;
public interface DaoEmployee {
/*
* 查询所有员工的信息
*/
List<Employee> findAllEmployees();
/*
* 通过id查询员工信息
*/
Employee findEmployeeById(Integer id);
/*
* 通过id修改员工信息
*/
void updateEmployee(Employee employee);
}4、DaoEmployeeImpl.java
package cn.itcast.daoIml;
import *;
public class DaoEmployeeImpl implements DaoEmployee {
public void saveEmployee(Employee employee) {
Connection conn=null;
PreparedStatement pstatement=null;
DBManager dbManager=new DBManager();
conn=dbManager.getConnection();
//组织SQL语句
String sql="INSERT INTO employees (id,username,pasw,realname,sex,birthday,edu,major,des," +
"hiredate,role) values(null,?,?,?,?,?,?,?,?,?,?)";
try {
pstatement=conn.prepareStatement(sql);
pstatement.setString(1, employee.getUsername());
pstatement.setString(2, employee.getPassword());
pstatement.setString(3, employee.getRealname());
pstatement.setString(4, employee.getSex());
pstatement.setDate(5, employee.getBirthday());
pstatement.setString(6, employee.getEdu());
pstatement.setString(7, employee.getMajor());
pstatement.setString(8, employee.getDescription());
pstatement.setDate(9, employee.getHiredate());
pstatement.setString(10, employee.getRole());
pstatement.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(dbManager!=null){
dbManager.closeResource(conn, pstatement, null);
}
}
}
public List<Employee> findAllEmployees() {
Connection conn=null;
ResultSet rs=null;
PreparedStatement pstatement=null;
DBManager dbManager=new DBManager();
conn=dbManager.getConnection();
List<Employee> list=new ArrayList<Employee>();
//组织SQL语句
String sql="select id,username,pasw,realname,sex,birthday,edu,major,des," +
"hiredate,role from employees order by id";
try {
pstatement=conn.prepareStatement(sql);
rs = pstatement.executeQuery();
while(rs.next()){
Employee employee=new Employee();
employee.setId(rs.getInt("id"));
employee.setUsername(rs.getString(2));
employee.setPassword(rs.getString(3));
employee.setRealname(rs.getString(4));
employee.setSex(rs.getString("sex"));
employee.setBirthday(rs.getDate(6));
employee.setEdu(rs.getString("edu"));
employee.setMajor(rs.getString("major"));
employee.setDescription(rs.getString(9));
employee.setHiredate(rs.getDate(10));
employee.setRole(rs.getString("role"));
list.add(employee);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(dbManager!=null){
dbManager.closeResource(conn, pstatement, null);
}
}
return list;
}
public Employee findEmployeeById(Integer id) {
if(id==null){
throw new RuntimeException("您要查询的员工的信息的id不能为空");
}
Connection conn=null;
ResultSet rs=null;
PreparedStatement pstatement=null;
DBManager dbManager=new DBManager();
conn=dbManager.getConnection();
Employee employee=null;
//组织SQL语句
String sql="select id,username,pasw,realname,sex,birthday,edu,major,des," +
"hiredate,role from employees where id=?";
try {
pstatement=conn.prepareStatement(sql);
pstatement.setInt(1, id);
rs = pstatement.executeQuery();
if(rs.next()){
employee = new Employee();
employee.setId(rs.getInt("id"));
employee.setUsername(rs.getString(2));
employee.setPassword(rs.getString(3));
employee.setRealname(rs.getString(4));
employee.setSex(rs.getString("sex"));
employee.setBirthday(rs.getDate(6));
employee.setEdu(rs.getString("edu"));
employee.setMajor(rs.getString("major"));
employee.setDescription(rs.getString(9));
employee.setHiredate(rs.getDate(10));
employee.setRole(rs.getString("role"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(dbManager!=null){
dbManager.closeResource(conn, pstatement, null);
}
}
return employee;
}
public void updateEmployee(Employee employee) {
if(employee.getId()==null){
throw new RuntimeException("您要查询的员工的信息的id不能为空");
}
Connection conn=null;
ResultSet rs=null;
PreparedStatement pstatement=null;
DBManager dbManager=new DBManager();
conn=dbManager.getConnection();
//组织SQL语句
String sql="update employees set username=?,pasw=?,realname=?,sex=?,birthday=?,edu=?,major=?,des=?," +
"hiredate=?,role=? where id=?";
try {
pstatement=conn.prepareStatement(sql);
pstatement.setString(1, employee.getUsername());
pstatement.setString(2, employee.getPassword());
pstatement.setString(3, employee.getRealname());
pstatement.setString(4, employee.getSex());
pstatement.setDate(5, employee.getBirthday());
pstatement.setString(6, employee.getEdu());
pstatement.setString(7, employee.getMajor());
pstatement.setString(8, employee.getDescription());
pstatement.setDate(9, employee.getHiredate());
pstatement.setString(10, employee.getRole());
pstatement.setInt(11, employee.getId());
pstatement.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(dbManager!=null){
dbManager.closeResource(conn, pstatement, null);
}
}
}
}5、TestDaoEmployee.java
package cn.itcast.test;
import *;
public class TestDaoEmployee {
static DaoEmployee daoEmployee;
@BeforeClass public static void beforeClass(){
daoEmployee=DaoFactory.getDaoEmployee();
}
@Test @Ignore public void save(){
……
}
@Test @Ignore public void find(){
List<Employee> employee = daoEmployee.findAllEmployees();
for(Employee e:employee){
System.out.println(e.getId()+":"+e.getRealname());
}
}
@Test @Ignore public void findEmployeeById(){
Employee e = daoEmployee.findEmployeeById(123);
if(e!=null){
System.out.println(e.getId()+":"+e.getRealname());
}else{
System.out.println("employee =null");
}
}
@Test public void updateEmployee(){
//模拟数据
Employee employee=new Employee();
employee.setId(1);
employee.setUsername("fandong");
employee.setPassword("111");
employee.setRealname("发到");
employee.setSex("男");
employee.setBirthday(java.sql.Date.valueOf("1990-09-08"));
employee.setEdu("大专");
employee.setMajor("电子");
employee.setDescription("很好");
employee.setHiredate(java.sql.Date.valueOf("1990-09-09"));
employee.setRole("经理");
daoEmployee.updateEmployee(employee);
}
}6、EditServlet.java
package cn.itcast.web;
import *;
public class EditServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
String path="";
try{//获取employee的id
String sid=request.getParameter("id");
Integer id=null;
if(sid!=null && !("".equals(sid.trim()))){
id=Integer.parseInt(sid);
}
//获取dao层的对象
DaoEmployee daoEmployee=DaoFactory.getDaoEmployee();
Employee employee = daoEmployee.findEmployeeById(id);
request.setAttribute("employee", employee);
path="/employees/edit.jsp";
}catch(Exception e){
e.printStackTrace();
request.setAttribute("errorMsg", "数据转换有错误！！！");
path="/error.jsp";
}
request.getRequestDispatcher(path).forward(request, response);
}
……7、edit.jsp
<%@ 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>
<meta http-equiv="content-type" content="html/text;charset=utf-8"/>
<script language="javascript" src="${pageContext.request.contextPath}/js/Calendar.js">
</script>
</head>
<body>
<div id="body">
员工信息编辑页面：
<div id="table">
<c:if test="${!empty employee}">
<form action="${pageContext.request.contextPath}/servlet/UpdateServlet" method="post">
<p>
<input type="hidden" name="id" value="${requestScope.employee.id}">
</p>
<table>
<tr>
<td class="td1">用户名：</td>
<td class="td2"><input type="text" name="username" value="${requestScope.employee.username}"></td>
</tr>
<tr>
<td class="td1">密码：</td>
<td class="td2"><input type="password" name="password" value="${employee.password}"></td>
</tr>
<tr>
<td class="td1">真实姓名：</td>
<td class="td2"><input type="text" size="40%" name="name" value="${requestScope.employee.realname}"></td>
</tr>
<tr>
<td class="td1">性别：</td>
<td class="td2">
<input type=radio name="sex" value="男"
<c:if test="${requestScope.employee.sex=='男'}">
checked
</c:if>
/>男
<input type=radio name="sex" value="女" ${requestScope.employee.sex=='女'?'checked':''} />女
</td>
</tr>
<tr>
<td class="td1">出生日期：</td>
<td class="td2">
<input type="text" id="time" name="birthday" value="${employee.birthday}">
<input type="button" onClick="MyCalendar.SetDate(this,document.getElementById('time'))" value="选择"/>
</td>
</tr>
<tr>
<td class="td1">学历：</td>
<td class="td2">
<select name="edu">
<option value="博士" ${employee.edu=='博士'?'selected':''}>博士</option>
<option value="硕士" ${employee.edu=='硕士'?'selected':''}>硕士</option>
<option value="本科生" ${employee.edu=='本科生'?'selected':''}>本科生</option>
<option value="大专" ${employee.edu=='大专'?'selected':''}>大专</option>
<option value="中专" ${employee.edu=='中专'?'selected':''}>中专</option>
<option value="高中" ${employee.edu=='高中'?'selected':''}>高中</option>
</select>
</td>
</tr>
<tr>
<td class="td1">专业：</td>
…….
</td>
</tr>
<tr>
<td class="td1">职位描述：</td>
<td class="td2">
<textarea cols="40" rows="5" name="description" style="overflow:auto">
${employee.description}
</textarea>
</td>
</tr>
<tr>
<td class="td1">入职时间：</td>
……
</tr>
<tr>
<td class="td1">所属角色：</td>
<td class="td2">
<select name="role">
……
</select>
</td>
</tr>
<tr>
<td>
<div id="que">
<input type="submit" size="10%" value="更新">
</div>
</td>
</tr>
</table>
</form>
</c:if>
<c:if test="${empty employee}">
您编辑的员工信息不存在！
</c:if>
</div>
</div>
</body>
</html>8、UpdateServlet.java
package cn.itcast.web;
import *;
public class UpdateServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
String path="";
try{
//获取表单数据
String sid=request.getParameter("id");
String username=request.getParameter("username");
String password=request.getParameter("password");
String realname=request.getParameter("name");
String sex=request.getParameter("sex");
String sbirthday=request.getParameter("birthday");
String edu=request.getParameter("edu");
String major=request.getParameter("major");
String description=request.getParameter("description");
String shiredate=request.getParameter("hiredate");
String role=request.getParameter("role");
//封装到javabean中
Employee employee=new Employee();
employee.setUsername(username);
employee.setPassword(password);
employee.setRealname(realname);
employee.setSex(sex);
employee.setEdu(edu);
employee.setMajor(major);
employee.setDescription(description);
employee.setRole(role);
Integer id=null;
if(sid!=null&& !("".equals(sid.trim()))){
id=Integer.parseInt(sid);
}
employee.setId(id);
//处理日期(""和格式书写正确)
Date birthday=null;
Date hiredate=null;
if(sbirthday!=null&& !("".equals(sbirthday.trim()))){
birthday=java.sql.Date.valueOf(sbirthday.trim());
}
if(shiredate!=null&& !("".equals(shiredate.trim()))){
hiredate=java.sql.Date.valueOf(shiredate.trim());
}
employee.setBirthday(birthday);
employee.setHiredate(hiredate);
//调用工厂获取dao层对象
DaoEmployee daoEmployee=DaoFactory.getDaoEmployee();
//调用dao保存员工信息的方法
daoEmployee.updateEmployee(employee);
//保存成功****转到重新添加页面
path="/servlet/ListServlet";
/**
* 怎样看应该转到那个页面：在浏览器中在要转到的页面对应的超链接上面点击右键-->属性，就能看到了
*/
}catch(Exception e){
e.printStackTrace();
path="/error.jsp";
request.setAttribute("errorMsg", "数据转换异常");
}
//转发
request.getRequestDispatcher(path).forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}第三部分、查询
1、left.jsp
……
<p>
图书信息管理<br/>
<a href="${pageContext.request.contextPath}/employees/add.jsp" target="right">员工信息录入</a><br/>
<a href="${pageContext.request.contextPath}/servlet/ListServlet" target="right">员工信息查询</a><br/>
<a href="${pageContext.request.contextPath}/employees/listCondition.jsp" target="right">高级查询</a>
……2、list.jsp
……
.td1{
text-align:center;
font-size:14px;
width:70px}
.td2{
text-align:center;
font-size:14px;
width:240px;
……
<div id="table">
<c:choose>
<c:when test="${!empty list}">
<table border="1">
<tr>
<td><div class="td1">用户名</div></td>
<td><div class="td1">密码</div></td>
<td><div class="td1">真实姓名</div></td>
<td><div class="td1">性别</div></td>
<td><div class="td1">出生日期</div></td>
<td><div class="td1">学历</div></td>
<td><div class="td1">专业</div></td>
<td><div class="td1">职位描述</div></td>
<td><div class="td1">入职时间</div></td>
<td><div class="td1">所属角色</div></td>
<td><div class="td1" colspan="3">操作</div></td>
</tr>
<c:forEach items="${list}" var="employee">
<tr>
<td>${employee.username}</td>
<td>${employee.password}</td>
<td>${employee.realname}</td>
<td>${employee.sex}</td>
<td>${employee.birthday}</td>
<td>${employee.edu}</td>
<td>${employee.major}</td>
<td>${employee.description}</td>
<td>${employee.hiredate}</td>
<td>${employee.role}</td>
<td>
<a href="">查看</a>
<a href="${pageContext.request.contextPath}/servlet/EditServlet?id=${employee.id}">编辑</a>
<a href="">删除</a>
</td>
</tr>
</c:forEach>
</table>
</c:when>
<c:otherwise>
没有您要查询的数据!!!
</c:otherwise>
</c:choose>
……3、ListConditionServlet.java
package cn.itcast.web;
import *;
public class ListConditionServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws Exception {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
String path="";
try{
//获取查询条件
String username=request.getParameter("username");
String realname=request.getParameter("realname");
String sex=request.getParameter("sex");
String sbeginhiredate=request.getParameter("beginhiredate");
String sendhiredate=request.getParameter("endhiredate");
String edu=request.getParameter("edu");
//封装到javabean
SearchEmployee searchEmployee=new SearchEmployee();
searchEmployee.setUsername(username);
searchEmployee.setRealname(realname);
searchEmployee.setSex(sex);
searchEmployee.setEdu(edu);
Date beginHiredate=null;
if(sbeginhiredate!=null&& !("".equals(sbeginhiredate.trim()))){
beginHiredate=java.sql.Date.valueOf(sbeginhiredate);
}
searchEmployee.setBeginHiredate(beginHiredate);
Date endHiredate=null;
if(sendhiredate!=null&& !("".equals(sendhiredate.trim()))){
endHiredate=java.sql.Date.valueOf(sendhiredate);
}
searchEmployee.setEndHiredate(endHiredate);
//获取dao对象
DaoEmployee daoEmployee=DaoFactory.getDaoEmployee();
//调用查询方法
List<Employee> list=daoEmployee.findEmployeesByCondition(searchEmployee);
request.setAttribute("list", list);
path="/employees/listCondition.jsp";
}catch(Exception e){
e.printStackTrace();
path="/error.jsp";
request.setAttribute("errorMsg", "查询输入条件有误！");
}
request.getRequestDispatcher(path).forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}4、SearchEmployee.java
package cn.itcast.bean;
import java.sql.Date;
public class SearchEmployee {
private String username;
private String sex;
private String realname;
private Date beginHiredate;
private Date endHiredate;
private String edu;
……
}5、DaoEmployee.java
package cn.itcast.dao;
import *;
public interface DaoEmployee {
/*
* 保存员工信息到数据库中
*/
void saveEmployee(Employee employee);
/*
* 查询所有员工的信息
*/
List<Employee> findAllEmployees();
/*
* 通过id查询员工信息
*/
Employee findEmployeeById(Integer id);
/*
* 通过id修改员工信息
*/
void updateEmployee(Employee employee);
/*
* 通过条件查询员工信息
*/
List<Employee> findEmployeesByCondition(SearchEmployee searchEmployee);
}6、DaoEmployeeImpl.java
package cn.itcast.daoIml;
import *;
public class DaoEmployeeImpl implements DaoEmployee {
……
public List<Employee> findEmployeesByCondition(SearchEmployee searchEmployee) {
Connection conn=null;
ResultSet rs=null;
PreparedStatement pstatement=null;
DBManager dbManager=new DBManager();
conn=dbManager.getConnection();
List<Employee> list=new ArrayList<Employee>();
//组织SQL语句
String sql="SELECT id,username,pasw,realname,sex,birthday,edu,major,des,hiredate,role FROM employees WHERE 1=1";
//组织查询条件
//封装sql语句
StringBuffer whereSql=new StringBuffer();
//?的值
List<Object> paramList=new ArrayList<Object>();
//用户名用like查询
if(searchEmployee.getUsername()!=null && !("".equals(searchEmployee.getUsername().trim()))){
whereSql.append(" and username like ?");
paramList.add("%"+searchEmployee.getUsername().trim()+"%");
}
//真实姓名用like查询
if(searchEmployee.getRealname()!=null && !("".equals(searchEmployee.getRealname().trim()))){
whereSql.append(" and realname like ?");
//注意下面的代码，不能有单引号
paramList.add("%"+searchEmployee.getRealname().trim()+"%".trim());
}
//性别用=查询
if(searchEmployee.getSex()!=null && !("".equals(searchEmployee.getSex().trim()))){
whereSql.append(" and sex=?");
paramList.add(searchEmployee.getSex().trim().trim());
}
//学历=查询
if(searchEmployee.getEdu()!=null && !("".equals(searchEmployee.getEdu().trim()))){
whereSql.append(" and edu=?");
paramList.add(searchEmployee.getEdu().trim());
}
//雇用日期查询用between and查询
if(searchEmployee.getBeginHiredate()!=null &&searchEmployee.getEndHiredate()!=null){
whereSql.append(" and hiredate between ? and ?");
paramList.add(searchEmployee.getBeginHiredate());
paramList.add(searchEmployee.getEndHiredate());
}
//组合SQL语句和查询条件
sql=sql+whereSql.toString();
//组合SQL语句和排序
sql=sql+" ORDER BY id asc";
System.out.println(sql);
Object[] params=paramList.toArray();
//开始查询
try {
pstatement=conn.prepareStatement(sql);
//设置参数
if(params!=null&¶ms.length>0){
for(int i=0;i<params.length;i++){
pstatement.setObject((i+1), params[i]);
System.out.println("params数组中的元素:"+params[i]);
}
}
rs=pstatement.executeQuery();
while(rs.next()){
Employee employee=new Employee();
employee.setId((Integer)rs.getObject(1));
employee.setUsername((String)rs.getObject(2));
employee.setPassword((String)rs.getObject(3));
employee.setRealname((String)rs.getObject(4));
employee.setSex((String)rs.getObject(5));
employee.setBirthday((java.sql.Date)rs.getObject(6));
employee.setEdu((String)rs.getObject(7));
employee.setMajor((String)rs.getObject(8));
employee.setDescription((String)rs.getObject(9));
employee.setHiredate((java.sql.Date)rs.getObject(10));
employee.setRole((String)rs.getObject(11));
list.add(employee);
System.out.println("添加完毕");
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
if(dbManager!=null){
dbManager.closeResource(conn, pstatement, rs);
}
}
return list;
}
/*public List<Employee> findEmployeesByCondition(SearchEmployee searchEmployee) {
Connection conn=null;
ResultSet rs=null;
Statement statement=null;
DBManager dbManager=new DBManager();
conn=dbManager.getConnection();
List<Employee> list=new ArrayList<Employee>();
//组织SQL语句
String sql="SELECT id,username,pasw,realname,sex,birthday,edu,major,des,hiredate,role FROM employees WHERE 1=1";
StringBuffer whereSql=new StringBuffer("");
String username=searchEmployee.getUsername();
if(username!=null&& !("".equals(username.trim()))){
whereSql.append(" and username like "+"'%"+username+"%'");
}
if(searchEmployee.getRealname()!=null&& !("".equals(searchEmployee.getRealname().trim()))){
whereSql.append(" and realname like "+"'%"+searchEmployee.getRealname()+"%'");
}
if(searchEmployee.getSex()!=null&& !("".equals(searchEmployee.getSex().trim()))){
whereSql.append(" and sex='"+searchEmployee.getSex()+"'");
}
if(searchEmployee.getEdu()!=null&& !("".equals(searchEmployee.getEdu().trim()))){
whereSql.append(" and edu='"+searchEmployee.getEdu()+"'");
}
if(searchEmployee.getBeginHiredate()!=null&& searchEmployee.getEndHiredate()!=null){
whereSql.append(" and hiredate between '"+searchEmployee.getBeginHiredate()
+"'"+" and '"+searchEmployee.getEndHiredate()+"'");
}
whereSql.append(" order by id asc");
sql=sql+whereSql.toString();
//System.out.println(sql);
try {
statement=conn.createStatement();
rs = statement.executeQuery(sql);
while(rs.next()){
Employee employee=new Employee();
employee.setId(rs.getInt("id"));
employee.setUsername(rs.getString(2));
employee.setPassword(rs.getString(3));
employee.setRealname(rs.getString(4));
employee.setSex(rs.getString("sex"));
employee.setBirthday(rs.getDate(6));
employee.setEdu(rs.getString("edu"));
employee.setMajor(rs.getString("major"));
employee.setDescription(rs.getString(9));
employee.setHiredate(rs.getDate(10));
employee.setRole(rs.getString("role"));
list.add(employee);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(dbManager!=null){
dbManager.closeResource(conn, statement, rs);
}
}
return list;
}
*/
}7、TestEmployee.java
package cn.itcast.test;
import *;
public class TestDaoEmployee {
static DaoEmployee daoEmployee;
@BeforeClass public static void beforeClass(){
daoEmployee=DaoFactory.getDaoEmployee();
}
@Test public void TestFindEmployeesByCondition(){
SearchEmployee searchEmployee=new SearchEmployee();
searchEmployee.setUsername("f");
searchEmployee.setRealname("");
searchEmployee.setSex("");
searchEmployee.setEdu("");
/*searchEmployee.setBeginHiredate(java.sql.Date.valueOf("1990-01-01"));
searchEmployee.setEndHiredate(java.sql.Date.valueOf("2009-01-01"));*/
List list = daoEmployee.findEmployeesByCondition(searchEmployee);
System.out.println(list);
}
}8、listCondition.jsp
<%@ 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>
…….td1{
border:#00C solid 0px;
text-align:center;
width: 80px;
}
.td2{
border:#00C solid 0px;
text-align:center;
width: 120px;
}
</head>
<body>
<div id="body">
<div id="head"><h2>条件查询：</h2></div>
<div id="table">
<form action="${pageContext.request.contextPath}/servlet/ListConditionServlet" method="post">
<table>
<tr>
<td style="text-align: right">用户名：</td>
<td ><input type="text" size="40%" name="username"></td>
</tr>
<tr>
<td style="text-align: right">真实姓名：</td>
<td><input type="text" size="40%" name="realname"></td>
</tr>
<tr>
<td style="text-align: right">性别：</td>
<td class="td1">
<input type=radio name="sex" value="男">男
<input type=radio name="sex" value="女">女
</td>
</tr>
<tr>
<td style="text-align: right">开始雇用日期：</td>
<td>
<input type="text" id="time1" name="beginhiredate" value="1990-09-09">
<input type="button" onClick="MyCalendar.SetDate(this,document.getElementById('time1'))" value="选择"/>
</td>
</tr>
<tr>
<td style="text-align: right">结束雇用日期：</td>
<td>
<input type="text" id="time2" name="endhiredate" value="2009-09-01">
<input type="button" onClick="MyCalendar.SetDate(this,document.getElementById('time2'))" value="选择"/>
</td>
</tr>
<tr>
<td style="text-align: right">学历：</td>
<td>
<select name="edu">
<option value="" selected>请选择
<option value="博士">博士
<option value="硕士">硕士
<option value="本科">本科
<option value="大专">大专
<option value="中专">中专
<option value="高中">高中
</select>
</td>
</tr>
<tr>
<td>
<div id="que">
<input type="submit" size="10%" value="提交">
</div>
</td>
<td>
<div id="chong">
<input type="reset" size="10%" value="重置">
</div>
</td>
</tr>
</table>
</form>
</div>
<div id="resulttitle">
<h4>查询结果为：</h4>
</div>
<div id="table">
<c:choose>
<c:when test="${!empty list}">
<table border="1">
<tr>
<td><div class="td1">编号</div></td>
<td><div class="td1">用户名</div></td>
<td><div class="td1">密码</div></td>
<td><div class="td1">真实姓名</div></td>
<td><div class="td1">性别</div></td>
<td><div class="td1">出生日期</div></td>
<td><div class="td1">学历</div></td>
<td><div class="td1">专业</div></td>
<td><div class="td2">职位描述</div></td>
<td><div class="td2">入职时间</div></td>
<td><div class="td1">所属角色</div></td>
<td><div class="td2" colspan="3">操作</div></td>
</tr>
<c:forEach items="${list}" var="employee">
<tr>
<td>${employee.id}</td>
<td>${employee.username}</td>
<td>${employee.password}</td>
<td>${employee.realname}</td>
<td>${employee.sex}</td>
<td>${employee.birthday}</td>
<td>${employee.edu}</td>
<td>${employee.major}</td>
<td>${employee.description}</td>
<td>${employee.hiredate}</td>
<td>${employee.role}</td>
<td>
<a href="">查看</a>
<a href="${pageContext.request.contextPath}/servlet/EditServlet?id=${employee.id}">编辑</a>
<a href="">删除</a>
</td>
</tr>
</c:forEach>
</table>
</c:when>
<c:otherwise>
没有您要查询的数据！！！
</c:otherwise>
</c:choose>
……
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