springMVC（八）——数据校验（后台校验 hibernate validate）.

数据校验（后台校验 hibernate validate）

1、首先要导入jar包

 

<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>1.1.0.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml/classmate -->
<dependency>
    <groupId>com.fasterxml</groupId>
    <artifactId>classmate</artifactId>
    <version>1.0.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.1.3.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jboss.logging/jboss-logging -->
<dependency>
    <groupId>org.jboss.logging</groupId>
    <artifactId>jboss-logging</artifactId>
    <version>3.1.3.GA</version>
</dependency>

 

 

2、在相应的实体类中加入注解

package com.zhiyou100.zjc.bean;

import javax.validation.constraints.Pattern;

import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotEmpty;

public class User {
    @NotEmpty(message = "用户名不为空")
    private String username;
    @Length(min = 6,max = 18,message = "密码长度在6~18之间")
    private String password;
    @Pattern(regexp = "/^1([38][0-9]|4[579]|5[0-3,5-9]|6[6]|7[0135678]|9[89])\\d{8}$/",message = "手机号格式不正确")
    private String phone;
    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 getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }

}

 

 下图为各个注解的意思：

 3、在控制层接受参数时

package com.zhiyou100.zjc.controller;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.RequestMapping;

import com.zhiyou100.zjc.bean.User;

@Controller
public class UserController {
    
    @RequestMapping("login")//如果没有登录，那么访问该请求地址是被打倒登录界面
    //@Valid:校验该参数对象
    //BindingResult:封装所有的验证错误信息
    public String login(@Valid User user,BindingResult br,Model model) {
        if(br.hasErrors()) {//判断有没有错误信息
            List<FieldError> fieldErrors = br.getFieldErrors();//等到所有的错误信息
            Map<String, Object> errormsg = new HashMap<String, Object>();
            for(FieldError errors:fieldErrors) {
                //getField()得到错误的字段         getDefaultMessage()得到错误的提示信息
                errormsg.put(errors.getField(), errors.getDefaultMessage());
                System.out.println(errors.getField()+"----"+errors.getDefaultMessage());
            }
            model.addAttribute("msg", errormsg);
            return "forward:index.jsp";
        }
        return "list";
    }
}

 前端代码

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="login" method="post">
        用户名:<input type="text" name="username"/>${msg.username }<br>
        密码:<input type="text" name="password">${msg.password }<br>
        电话:<input type="text" name="phone">${msg.phone }<br>
        <input type="submit" value="登录">
    </form>
</body>
</html>

 

点击登录时，测试效果

 

 

posted @ 2019-09-04 23:55  小成~  阅读(297)  评论(0)  编辑  收藏  举报