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>