Java实现验证码 - JAVA - 编程开发网

sion().get("randomStr"); if(code.trim().equalsIgnoreCase(randomStr)){ if("admin".equals(userName.trim())&&"admin".equals(password.trim())){ //成功 inputStream=new ByteArrayInputStream("1".getBytes("UTF-8")); }else{ //用户名或密码错误 inputStream=new ByteArrayInputStream("2".getBytes("UTF-8")); } }else{ //验证码错误 inputStream=new ByteArrayInputStream("0".getBytes("UTF-8")); } return "result"; } 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 getCode() { return code; } public void setCode(String code) { this.code = code; } }

4、配置struts.xml、web.xml文件

    


    	
	
      
       
        
       
        success.jsp
        
        
        
        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

5、编写测试页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>


  
    
    
    My JSP 'index.jsp' starting page
	<script type="text/java script" src="js/jquery-1.10.2.min.js">
	<script type="text/java script" src="js/jquery.form.js">
	<script type="text/java script">
		$(document).ready(function(){
			CODE.initCode();
			//验证输入
			function checkInput(){
				if($('#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:

成功页面就部贴出来了，就是一段文字而已
显示结果：

Java实现验证码(二)