【第13章】spring-mvc之validator

news2025/1/15 6:41:50

文章目录

前言
一、准备
- 1. 引入库
- 2. add.jsp
- 3. show.jsp
二、代码部分
- 1.实体类
- 2. 控制器类
- 3. 效果
- 4. 展示
总结

前言

【第20章】spring-validator

虽然前面已经在spring介绍过，但是为了保证代码可用，还是会从头讲到尾，尽量把关键点列出来讲给大家。

一、准备

1. 引入库

<!-- https://mvnrepository.com/artifact/org.hibernate.validator/hibernate-validator -->
 <dependency>
     <groupId>org.hibernate.validator</groupId>
     <artifactId>hibernate-validator</artifactId>
     <version>8.0.1.Final</version>
 </dependency>
 <!-- https://mvnrepository.com/artifact/org.glassfish/jakarta.el -->
 <dependency>
     <groupId>org.glassfish</groupId>
     <artifactId>jakarta.el</artifactId>
     <version>4.0.2</version>
     <scope>test</scope>
 </dependency>

2. add.jsp

<%--
  Created by IntelliJ IDEA.
  User: 张军国001
  Date: 2024/5/2
  Time: 17:53
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>增加用户</title>
</head>
<body>
<form action="/user" method="post">
    <span>姓名:</span><input name="name">${name}<br>
    <span>年龄:</span><input name="age">${age}<br>
    <span>出生日期:</span><input name="brith">${brith}<br>
    <span>手机号:</span><input name="phone">${phone}<br>
    <span>邮箱:</span><input name="email">${email}<br>
    <button type="submit">增加</button>
</form>
</body>
</html>

3. show.jsp

<%--
  Created by IntelliJ IDEA.
  User: 张军国001
  Date: 2024/5/2
  Time: 17:53
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<html>
<head>
    <title>结果展示</title>
</head>
<body>
<span>姓名:</span>${user.name}<br>
<span>年龄:</span>${user.age}<br>
<span>出生日期:</span><spring:eval expression="user.brith"/><br>
<span>手机号:</span>${user.phone}<br>
<span>邮箱:</span>${user.email}<br>
</body>
</html>

二、代码部分

1.实体类

package org.example.springmvc.validator.po;

import jakarta.validation.constraints.Email;
import jakarta.validation.constraints.Max;
import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.NotEmpty;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Past;
import jakarta.validation.constraints.Pattern;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.springframework.format.annotation.DateTimeFormat;
import java.util.Date;

/**
 * Create by zjg on 2024/5/2
 */
@Getter
@Setter
@ToString
public class User {
        @NotEmpty(message = "name is not null")
        private String name;
        @NotNull(message = "Age is not null")
        @Min(value=0,message = "Age range required to be between 0-130")
        @Max(value=130,message = "Age range required to be between 0-130")
        private Integer age;
        @NotNull(message = "brith is not null")
        @DateTimeFormat(pattern = "yyyyMMdd")
        @Past(message = "Birth date must be before the current date")
        private Date brith;
        @NotEmpty(message = "phone  is not null")
        @Pattern(regexp = "^1[3-9]\\d{9}$",message="请输入11位正确的手机号码")
        private String phone;
        @Email
        @NotEmpty(message = "email  is not null")
        private String email;
}

2. 控制器类

package org.example.springmvc.validator.controller;

import jakarta.validation.Valid;
import org.example.springmvc.validator.po.User;
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.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Create by zjg on 2024/5/2
 */
@Controller
public class ValidatorController {
    @RequestMapping("hello-vaildator")
    public String hello(){
        return "validator/add";
    }
    @PostMapping("/user")
    public String add(@Valid User user, BindingResult bindingResult, Model model){
        System.out.println(user);
        if(bindingResult.hasFieldErrors()){
            for (FieldError fieldError:bindingResult.getFieldErrors()){
                model.addAttribute(fieldError.getField(),fieldError.getDefaultMessage());
            }
            return "validator/add";
        }
        return "validator/show";
    }
}