(一)美化管理系统界面，完善页面
软件：
playcolor——得到颜色配置
Sothink Logo Maker——制作网页logo
(二)管理系统功能改进
1.删除用户
（1）wel.java中添加
pw.println("<td><a href="DelUserCl?userid=" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" mce_href="DelUserCl?userid=" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" "+ub.getUserId()+" οnclick=/"return window.confirm('您确认删除该用户吗？')/">删除用户</a></td>");
（2）编写DelUserCl.java（删除处理页面）
//处理删除某个用户
package com.tsinghua;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class DelUserCl extends HttpServlet {
public void init() throws ServletException{}
public void process(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
try{
res.setContentType("text/html;charset=UTF-8"); //中文乱码解决
//调用userBeanCl的删除用户的方法，完成删除
UserBeanCl ubc=new UserBeanCl();
//接收从Wel.java中传递的id
String id=req.getParameter("userid");
if( ubc.delUser(id)){
//删除成功
res.sendRedirect("Ok");
}else{
//删除失败
res.sendRedirect("Erro");
}
}catch(Exception ex){
ex.printStackTrace();
}
}
public void doGet(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
process(req,res);
}
public void doPost(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
process(req,res);
}
public void destroy(){
super.destroy();
}
}
（3）编写Erro.java（删除失败）
//操作失败页面
package com.tsinghua;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class Erro extends HttpServlet {
public void init() throws ServletException{}
public void process(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
try{
//中文乱码解决
res.setContentType("text/html;charset=UTF-8");
//业务逻辑
PrintWriter pw=res.getWriter();
//返回登录界面
pw.println("<html>");
pw.println("<body bgcolor=#345D6E>");
pw.println("<img src="images/lola.gif" mce_src="images/lola.gif"><hr><center>");
pw.println("<h1>很遗憾，操作失败！</h1>");
pw.println("<a href="main" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" mce_href="main" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" >返回主界面</a> <a href="welcome" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" mce_href="welcome" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" >继续删除/修改用户</a>");
pw.println("</center><hr><img src="images/mylogo.bmp" mce_src="images/mylogo.bmp">");
pw.println("</body>");
pw.println("</html>");
}catch(Exception ex){
ex.printStackTrace();
}
}
public void doGet(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
process(req,res);
}
public void doPost(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
process(req,res);
}
public void destroy(){
super.destroy();
}
}
（4）编写Ok.java（删除成功页面）
//操作成功页面
package com.tsinghua;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class Ok extends HttpServlet {
public void init() throws ServletException{}
public void process(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
try{
//中文乱码解决
res.setContentType("text/html;charset=UTF-8");
//业务逻辑
PrintWriter pw=res.getWriter();
//返回登录界面
pw.println("<html>");
pw.println("<body bgcolor=#345D6E>");
pw.println("<img src="images/lola.gif" mce_src="images/lola.gif"><hr><center>");
pw.println("<h1>恭喜你，操作成功</h1>");
pw.println("<a href="main" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" mce_href="main" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" >返回主界面</a> <a href="welcome" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" mce_href="welcome" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" >继续删除/修改用户</a>");
pw.println("</center><hr><img src="images/mylogo.bmp" mce_src="images/mylogo.bmp">");
pw.println("</body>");
pw.println("</html>");
}catch(Exception ex){
ex.printStackTrace();
}
}
public void doGet(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
process(req,res);
}
public void doPost(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
process(req,res);
}
public void destroy(){
super.destroy();
}
}
2.显示用户的头像
（1）数据库添加字段：
alter table users add column myPic varchar(50);
insert into users(myPic) values('1.gif');//添加记录
（2）在images中加入头像
（3）添加代码：
pw.println("<img src="images/lola.gif" mce_src="images/lola.gif"> 欢迎您："+myName+"<img src="images/1.gif" mce_src="images/1.gif"><hr><center>");
3.指定跳转到某一页
清楚servlet和html表单提交原理
Wel.java中加入：
pw.println("请输入需要跳转的页面");
pw.println("<form action=welcome>");
pw.println("<input type=text name=pageNow>");
pw.println("<input type=submit value=go>");
pw.println("</form>");
3.精确查找和模糊查找
//查询用户使用表单
pw.println("<form method=post action=search>");
pw.println("请输入用户名：<input type=text name=uname>");
pw.println("<input type=submit value=搜><br><br>");
pw.println("<input type=radio name=sType value=mo checked>模糊查询");
pw.println("<input tyep=radio name=sType value=zhu>精确查询");
pw.println("</form>");
//得到搜索的类型
String type=req.getParameter("sType");
String con=req.getParameter("uname");
if(con!=null){
String sql="";
if(type.equals("mo")){
sql="select * from users where username like '%'"+con+"%'";//模糊查找
}else{
sql="select * from users where username='"+con+"'";// 精确查找
}
}
（三）终极框架图
![使用Windbg调试.Net应用程序[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)