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学习实例.文章管理.文章类.Article.java

2012-08-01 14:34 190 查看
package business;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.text.*;
import java.sql.ResultSet;

public class Article extends HttpServlet {
String ID,Title,Content,Author,AddDate;
private static final long serialVersionUID = 3617859655330969141L;
//数据库操作对象
DBUtil Conn;

/**
* Constructor of the object.
*/
public Article() {
super();
Conn = new DBUtil();
}

public String getAddDate() {
return AddDate;
}

public void setAddDate(String addDate) {
AddDate = addDate;
}

public String getAuthor() {
return Author;
}

public void setAuthor(String author) {
Author = author;
}

public String getContent() {
return Content;
}

public void setContent(String content) {
Content = content;
}

public String getTitle() {
return Title;
}

public void setTitle(String title) {
Title = title;
}

public String getID() {
return ID;
}

public void setID(String id) {
ID = id;
}

/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
Conn.destroy();
}

/**

*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try{
request.setCharacterEncoding("GBK");
response.setContentType("text/html");
response.setCharacterEncoding("GBK");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println("  <HEAD><TITLE>保存文章</TITLE></HEAD>");
out.println("  <BODY>");
String Action=request.getParameter("Action");
ID = request.getParameter("ID");
if(Action=="Del"){
if(!ID.matches("[0-9]+")){
out.print("参数错误！");
}
boolean blnTemp = delete();
if(blnTemp){

}
}else{
out.print("错误的请求！");
}
out.println("  </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}catch(Exception e){
System.out.print("Article doGet:" + e.getMessage());
}
}

/**
POST取值
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try{

request.setCharacterEncoding("GBK");
response.setCharacterEncoding("GBK");
response.setContentType("text/html");
PrintWriter out = response.getWriter();
//取得客户端数据
String Action=request.getParameter("Action");
ID = request.getParameter("ID");
Title = request.getParameter("Title");
Content = request.getParameter("Content");
Author = request.getParameter("Author");
AddDate = GetDate();
//根据Action执行操作
int intTemp = 0;
if(Action.equals("SaveAdd")){
intTemp = Insert(request);
}else if(Action.equals("SaveEdit")){
if(ID.matches("[0-9]+")){
intTemp = Update(request);
}
}
//输出结果
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println("  <HEAD><TITLE>保存文章</TITLE></HEAD>");
out.println("  <BODY>");

if(intTemp>0){
out.print("保存数据成功！");
out.print("<a href=../index.jsp>返回</a>");
}else{

}
out.println("  </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}catch(Exception e){
System.out.print("Article doPost:" + e.getMessage());
}
}
//写入
private int Insert(HttpServletRequest request){
String sql;
int intTemp=0;
sql = "";
try{
request.setCharacterEncoding("GBK");
sql = "Insert Into Articles (Title,Content,Author,AddDate) Values ('";
sql += Title;
sql += "','" + Content;
sql += "','" + Author;
sql += "','" + AddDate;
sql += "')";
intTemp = Conn.Update(sql);
}catch(Exception e){
System.out.print("Article Insert:" + e.getMessage());
}
return intTemp;
}
//更新
private int Update(HttpServletRequest request){
String sql;
int intTemp=0;
try{
request.setCharacterEncoding("GBK");
sql = "Update Articles Set ";
sql += "Title='" + Title;
sql += "',Content='" + Content;
sql += "',Author='" + Author;
sql += "' where ID=" + ID;
intTemp = Conn.Update(sql);
}catch(Exception e){
System.out.print("Article Insert:" + e.getMessage());
}
return intTemp;
}
//删除
private boolean delete() throws Exception{
boolean blnTemp = false;
select();
if(Title!=null){
String sql = "delete From Articles where ID=" + ID;
int intTemp = 0;
intTemp = Conn.Execute(sql, intTemp);
if(intTemp>0){blnTemp = true;}
}
return blnTemp;
}
//查询
public void select(){
try{
String sql;
sql = "select * From Articles where ID=" + ID;
ResultSet rs = Conn.Execute(sql);
while(rs.next()){
ID = rs.getString("ID");
Title = rs.getString("Title");
Content = rs.getString("Content");
Author = rs.getString("Author");
}
}catch(Exception e){
System.out.print("Article Select:" + e.getMessage());
}
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init() throws ServletException {
try{

}catch(Exception e){
System.out.print("Article Init:" + e.getMessage());
}
}
private String GetDate(){
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
java.util.Date currentTime = new java.util.Date();//得到当前系统时间
String str_date1 = formatter.format(currentTime); //将日期时间格式化
//String str_date2 = currentTime.toString(); //将Date型日期时间转换成字符串形式
return str_date1;
}
}
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