JAVABEN+JSP登录

来源：互联网发布：三星怎么看网络电视编辑：程序博客网时间：2024/06/07 23:04

java

package cn.anli.demo;
import java.util.*; //导入包
public class Register
{
   private String name;
   private String age;
   private String email;
   private Map<String,String> errors=null;
   public Register(){
   this.name="";
   this.age="";
   this.email="";
   this.errors=new HashMap<String,String>();
   }
   public boolean isValidate(){
    boolean flag=true;
   if(!this.name.matches("\\w{6,15}")) //正则判断
   {
   flag=false;
   this.name="";
   this.errors.put("errorname","6-15");
   }
       if(!this.age.matches("\\d+"))
   {
   flag=false;
   this.age="";
   this.errors.put("errorage","must number");
   }
       if(!this.email.matches("\\w+@\\w+\\.\\w.\\w*"))
   {
   flag=false;
   this.email="";
   this.errors.put("erroremail","email is not user");
   }
   return flag;
   }
   public String getErrorMsg(String key){
    String value=this.errors.get(key);
   return value== null?"":value;
   }
    public void setName(String name){
    this.name=name;
   }
    public void setAge(String age){
   this.age=age;
   }
   public void setEmail(String email){
   this.email=email;
   }
   public String getName()
   {
      return this.name;
   }
   public String getAge()
   {
      return this.age;
   }
   public String getEmail()
   {
      return this.email;
   }
}

<%@ page contentType="text/html" pageEncoding="utf-8"%>
<html>
<head>
<title>
</title>
</head>
<body>
   <%
   request.setCharacterEncoding("utf-8");
   %>
   <jsp:useBean id="reg" scope="request" class="cn.anli.demo.Register"/>

<form action="check.jsp" method="post">
姓名：<input type="text" name="name" value="<jsp:getProperty name="reg" property="name"/>"/><%=reg.getErrorMsg("errorname")%>
</br>
年龄：<input type="text" name="age" value="<jsp:getProperty name="reg" property="age"/>"/><%=reg.getErrorMsg("errorage")%>
</br>
email：<input type="text" name="email" value="<jsp:getProperty name="reg" property="email"/>"/><%=reg.getErrorMsg("erroremail")%>
<br>
<input type="submit" value="提交"/> <input type="reset" value="重置"/>
</form>
</body>
</html>

check

<%@ page contentType="text/html" pageEncoding="utf-8"%>
<html>
<head>
<title>
</title>
</head>
<body>
   <%
   request.setCharacterEncoding("utf-8");
   %>
   <jsp:useBean id="reg" scope="request" class="cn.anli.demo.Register"/>

<jsp:setProperty name="reg" property="*"/>
<%
if(reg.isValidate())
{%>

   <jsp:forward page="success.jsp"/>
   <%
}
else
{
%>
    <jsp:forward page="login.jsp"/>

<%
}
%>
</body>
</html>

success

<%@ page contentType="text/html" pageEncoding="utf-8"%>
<html>
<head>
<title>
</title>
</head>
<body>
   <%
   request.setCharacterEncoding("utf-8");
   %>
   <jsp:useBean id="reg" scope="request" class="cn.anli.demo.Register"/>

姓名：<jsp:getProperty name="reg" property="name"/>
</br>
年龄：<jsp:getProperty name="reg" property="age"/>
</br>
email：<jsp:getProperty name="reg" property="email"/>
<br>

</body>
</html>