Spring Boot技术知识点：如何使用@Validated注解来对邮箱字段进行数据校验

package com.fm.validated.email.controller; import com.fm.validated.email.entity.User; import org.springframework.validation.BindingResult; import org.springframework.validation.FieldError; import org.springframework.validation.annotation.Validated; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.ArrayList; import java.util.List; /** * @author 未来码匠 */ @RestController @RequestMapping("user") public class UserController { @PostMapping("test") public Object testUser(@Validated @RequestBody User user, BindingResult result) { //得到所有错误信息计数 int errorCount = result.getErrorCount(); if (errorCount>0) { //得到所有错误 List<FieldError> fieldErrors = result.getFieldErrors(); List<String> allErrorMessages = new ArrayList<>(); fieldErrors.forEach((fieldError) -> { //错误信息 String field = fieldError.getField(); allErrorMessages.add(String.format("属性：%s,传来的值：%s,出错信息：%s",field, fieldError.getRejectedValue(), fieldError.getDefaultMessage())); }); return allErrorMessages; } return user; } }