1. 数据校验。（后台校验 hibernate validate）.
- 引入jar包。
- 在相应的实体类中加入注解。
1 package com.zhiyou100.wc.bean; 2 3 import javax.validation.constraints.Pattern; 4 5 import org.hibernate.validator.constraints.Length; 6 import org.hibernate.validator.constraints.NotEmpty; 7 8 public class Users { 9 @NotEmpty(message="用户名不能为空") 10 private String uname; 11 @Length(min=6,max=12,message="密码长度在【6~12】之间") 12 private String password; 13 @Pattern(regexp="^((13[0-9])|(14[579])|(15([0-3,5-9]))|(16[6])|(17[0135678])|(18[0-9]|19[89]))\\d{8}$",message="手机格式不准确") 14 private String phone; 15 16 public Users() { 17 super(); 18 } 19 20 public String getUname() { 21 return uname; 22 } 23 24 public void setUname(String uname) { 25 this.uname = uname; 26 } 27 28 public String getPassword() { 29 return password; 30 } 31 32 public void setPassword(String password) { 33 this.password = password; 34 } 35 36 public String getPhone() { 37 return phone; 38 } 39 40 @Override 41 public String toString() { 42 return "Users [uname=" + uname + ", password=" + password + ", phone=" + phone + "]"; 43 } 44 45 public void setPhone(String phone) { 46 this.phone = phone; 47 } 48 49 50 }
- 在控制层接受参数时。
1 package com.zhiyou100.wc.controllter;
2
3 import java.util.HashMap;
4 import java.util.List;
5 import java.util.Map;
6
7 import javax.validation.Valid;
8
9 import org.springframework.stereotype.Controller;
10 import org.springframework.ui.Model;
11 import org.springframework.validation.BindingResult;
12 import org.springframework.validation.FieldError;
13 import org.springframework.web.bind.annotation.RequestMapping;
14 import org.springframework.web.bind.annotation.SessionAttributes;
15
16 import com.zhiyou100.wc.bean.Users;
17
18 @Controller
19 @RequestMapping("user")
20 @SessionAttributes(names= {"name","address"})//键名叫：name保存的作用域为session
21 public class UsersControllter {
22
23
24 @RequestMapping("register")
25 public String register(@Valid Users users,BindingResult br,Model model) {
26 if(br.hasErrors()) {
27 List<FieldError> fieldErrors= br.getFieldErrors();
28 Map<String,Object> errorMsg=new HashMap<>();
29 for(FieldError f:fieldErrors) {
30 errorMsg.put(f.getField(), f.getDefaultMessage());
31 }
32 model.addAttribute("errorMsg", errorMsg);
33 return "forward:../register.jsp";
34 }
35
36 return "list";
37 }
38
39
40 }
1 <%@ page language="java" contentType="text/html; charset=UTF-8"
2 pageEncoding="UTF-8"%>
3 <!DOCTYPE html>
4 <html>
5 <head>
6 <meta charset="UTF-8">
7 <title>注册</title>
8 </head>
9 <body>
10 <!-- <a href="user/register.do?name=zs">链接到List.do</a> -->
11
12 <form action="/Springmvc-0904/user/register" method="post">
13 姓名：<input type="text" name="uname"/>${errorMsg.uname }<br>
14 密码：<input type="text" name="password"/>${errorMsg.password }<br>
15 手机：<input type="text" name="phone"/>${errorMsg.phone }<br>
16 <input type="submit" value="提交"/>
17 </form>
18
19 </body>
20 </html>
原文地址：https://www.cnblogs.com/banzhuanlaowang/p/11462660.html
时间： 2024-07-29 09:59:26