一、Person类
package com.jms.pojo;
import lombok.Data;
import javax.validation.constraints.*;
@Data
public class Person {
@NotBlank(message = "姓名不能为空")
private String name;
@Max(value = 100, message = "年龄不能超过100")
@Min(0)
private String age;
private String phone;
private String email;
}
二、Controller
package com.jms.controller;
import com.jms.pojo.Person;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.*;
import javax.validation.Valid;
@Controller
public class PersonController {
@GetMapping("/")
public String index(Model model) {
model.addAttribute("person", new Person());
return "index";
}
@PostMapping("/")
public String getPerson(@Valid Person person, Errors errors) {
if (errors.hasErrors()) return "index";
else return "person";
}
}
三、thymeleaf页面
index.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>主页面</title>
</head>
<body>
<form method="post" th:action="@{/}" th:object="${person}">
<div>
<input type="text" th:field="*{name}">
<span th:if="${#fields.hasErrors('name')}" th:errors="*{name}">错误提示</span>
</div>
<div>
<input type="text" th:field="*{age}">
<span th:if="${#fields.hasErrors('age')}"
th:errors="*{age}">
</span>
</div>
<div>
<input type="text" th:field="*{phone}">
<span th:if="${#fields.hasErrors('phone')}"
th:errors="*{phone}">
</span>
</div>
<div>
<input type="text" th:field="*{email}">
<span th:if="${#fields.hasErrors('email')}"
th:errors="*{email}">
</span>
</div>
<input type="submit" value="提交">
</form>
</body>
</html>
person.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>person</title>
</head>
<body>
<P>没有错误</P>
</form>
</body>
</html>
四、测试
没有错误后成功跳转person.html
（本文仅作个人学习记录用，如有纰漏敬请指正）
标签：String,Person,JSR303,private,person,thymeleaf,import,public,SpringBoot From： https://www.cnblogs.com/jmsstudy/p/17185399.html