package com.tenghu.code;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;
import javax.imageio.ImageIO;

/**
 * 验证码生成类
 * @author xiaohu
 *
 */
public class RandomImageGenerator {
 //创建Random对象
 static Random random=new Random();
 //随机生成包含验证码字符串
 public static String random(int num){
  //初始化种子
  String[] str={"0","1","2","3","4","5","6","7","8","9",
       "a","b","c","d","e","f","g","h","i","j",
       "k","l","m","n","p","q","r","s","t"};
  int number=str.length;
  //接收随机字符
  String text = "";
  //随机产生4个字符的字符串
  for(int i=0;i
   
    text/html
    result
   
  
 

 
    This is the description of my J2EE component
    This is the display name of my J2EE component
    RandomImageServlet
    com.tenghu.code.servlet.RandomImageServlet
   
   
     width
     130
   
   
   
     height
     40
   
   
   
     num
     4
   
 

 
    RandomImageServlet
    /verification.do
 
 
 
   struts2
   org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
 
 
   struts2
   /*
 
 
    index.jsp
 

 
   

    My JSP 'index.jsp' starting page
 
 
 
  $(document).ready(function(){
   CODE.initCode();
   //验证输入
   function checkInput(){
    if($('#userName').val()==''){
     alert('用户名不能为空！');
     return false;
    }
    if($('#password').val()==''){
     alert('密码不能为空！');
     return false;
    }
    if($('#code').val()==''){
     alert('验证码不能为空！');
     return false;
    }
    return true;
   }

   //点击按钮
   $('#btn').click(function(){
    if(checkInput()==true){
     $('#login_request').ajaxSubmit({
      url:'login!testLogin',
      cache:false,
      type:'POST',
      success:function(data){
       if(data==0){
        alert('验证码错误！');
        //改变验证码
        CODE.initCode();
       }else if(data==1){
        alert('登录成功！');
        //提交到登录成功页面
        $('#login_request')[0].submit();
       }else if(data==2){
        alert('用户名或密码错误！');
        //改变验证码
        CODE.initCode();
       }
      },
      error:function(e){
       alert('出错了！');
      }
     });
     }
   });
  });
  var CODE={
    //初始化化验证码
    initCode:function(){
     $("#code_img").attr("src","verification.do?rmd="+new Date().getTime())//如果需要点击图片改变图片的内容，则必须添加时间搓
     .click(function(){
      $(this).attr("src","verification.do?rmd="+new Date().getTime());
     }); 
    }};
 
 

 
   
    UserName:

    Password:

    Verification_Code: