1.java
1 package cn.gs.ly; 2 3 import java.util.HashMap; 4 import java.util.Map; 5 6 public class Register { 7 private String name; 8 private String age; 9 private String email; 10 private Map<String,String>errors = null; //存放登陆错误 提示信息 11 12 public Register() { 13 name=""; 14 age=""; 15 email=""; 16 errors = new HashMap<String, String>(); 17 } 18 //定义一个方法，数据验证操作 19 public boolean isValidate(){ 20 boolean flag = true; 21 if(!(this.name.matches("\w{2,6}"))){ //输入不符合正则表达式 22 flag = false; //触发flag 23 this.name=""; //name 赋空值 24 errors.put("errname", "请输入2~6位的**"); //登陆错误提示信息 放入集合 25 } 26 if(!(this.age.matches("\d{2}"))){ 27 flag = false; 28 this.age=""; 29 errors.put("errage", "请输入2位的数字"); 30 } 31 if(!(this.email.matches("[1-9]\d{4,10}@[qQ][qQ].com"))){ 32 flag = false; 33 this.email=""; 34 errors.put("erremail", "请输入正确的邮箱"); 35 } 36 return flag; 37 } 38 //定义一个语言 登陆错误提示信息 39 public String getErrorMsg(String key){ 40 String value = this.errors.get(key); 41 return value==null?"":value; //value为null赋空值 ，不为null 赋值value 42 } 43 44 public String getName() { 45 return name; 46 } 47 public void setName(String name) { 48 this.name= name; 49 } 50 public String getAge() { 51 return age; 52 } 53 public void setAge(String age) { 54 this.age = age; 55 } 56 public String getEmail() { 57 return email; 58 } 59 public void setEmail(String email) { 60 this.email = email; 61 } 62 63 }
1 package cn.gs.ly; 2 3 import java.util.HashMap; 4 import java.util.Map; 5 6 public class Register { 7 private String name; 8 private String age; 9 private String email; 10 private Map<String,String>errors = null; //存放登陆错误 提示信息 11 12 public Register() { 13 name=""; 14 age=""; 15 email=""; 16 errors = new HashMap<String, String>(); 17 } 18 //定义一个方法，数据验证操作 19 public boolean isValidate(){ 20 boolean flag = true; 21 if(!(this.name.matches("\w{2,6}"))){ //输入不符合正则表达式 22 flag = false; //触发flag 23 this.name=""; //name 赋空值 24 errors.put("errname", "请输入2~6位的**"); //登陆错误提示信息 放入集合 25 } 26 if(!(this.age.matches("\d{2}"))){ 27 flag = false; 28 this.age=""; 29 errors.put("errage", "请输入2位的数字"); 30 } 31 if(!(this.email.matches("[1-9]\d{4,10}@[qQ][qQ].com"))){ 32 flag = false; 33 this.email=""; 34 errors.put("erremail", "请输入正确的邮箱"); 35 } 36 return flag; 37 } 38 //定义一个语言 登陆错误提示信息 39 public String getErrorMsg(String key){ 40 String value = this.errors.get(key); 41 return value==null?"":value; //value为null赋空值 ，不为null 赋值value 42 } 43 44 public String getName() { 45 return name; 46 } 47 public void setName(String name) { 48 this.name= name; 49 } 50 public String getAge() { 51 return age; 52 } 53 public void setAge(String age) { 54 this.age = age; 55 } 56 public String getEmail() { 57 return email; 58 } 59 public void setEmail(String email) { 60 this.email = email; 61 } 62 63 }
2.jsp
1 <%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%> 2 <!DOCTYPE html> 3 <html> 4 <head> 5 <title>index</title> 6 </head> 7 <body> 8 <jsp:useBean id="reg" scope="request" class="cn.gs.ly.Register" ></jsp:useBean> 9 10 <form action="check.jsp" method="post"> 11 <table border="1" cellpadding="0" cellspacing="0"> 12 <tr> 13 <td>姓名：</td> 14 <td><input type="text" name="name" value='<jsp:getProperty property="name" name="reg" />'><%=reg.getErrorMsg("errname") %></td> 15 </tr> 16 <tr> 17 <td>年龄：</td> 18 <td><input type="text" name="age" value='<jsp:getProperty property="age" name="reg" />'><%=reg.getErrorMsg("errage") %> </td> 19 </tr> 20 <tr> 21 <td>邮箱：</td> 22 <td><input type="text" name="email" value='<jsp:getProperty property="email" name="reg" />'><%=reg.getErrorMsg("erremail")%> </td> 23 </tr> 24 </table> 25 <input type="submit" value="提交" /> 26 </form> 27 </body> 28 </html>
1 <%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%> 2 <!DOCTYPE html> 3 <html> 4 <head> 5 <title>check login</title> 6 </head> 7 <body> 8 <jsp:useBean id="reg" scope="request" class="cn.gs.ly.Register" ></jsp:useBean> 9 <jsp:setProperty name="reg" property="*" /> 10 <% 11 if(reg.isValidate()){ 12 %> 13 <jsp:forward page="success.jsp" /> 14 <% 15 }else{ 16 %> 17 <jsp:forward page="index.jsp" /> 18 <% 19 } 20 %> 21 </body> 22 </html>
1 <%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%> 2 <!DOCTYPE html> 3 <html> 4 <head> 5 <title>login success</title> 6 </head> 7 <body> 8 <% 9 request.setCharacterEncoding("UTF-8"); 10 response.setCharacterEncoding("UTF-8"); 11 %> 12 <jsp:useBean id="reg" scope="request" class="cn.gs.ly.Register" ></jsp:useBean> 13 <h1>登陆成功，登陆信息为:</h1><hr color="red"> 14 <h1>姓名:<jsp:getProperty property="name" name="reg" /></h1><hr color="red"> 15 <h1>年龄:<jsp:getProperty property="age" name="reg" /></h1><hr color="red"> 16 <h1>邮箱:<jsp:getProperty property="email" name="reg" /></h1><hr color="red"> 17 </body> 18 </html> 19