如何在spring boot中使用regex输入字段进行验证

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

import javax.validation.constraints.Pattern;

public class User {

    @Pattern(regexp = "^[A-Za-z0-9+_.-]+@(.+)$", message = "Invalid email format")
    private String email;

    // getters and setters
}

import org.springframework.validation.annotation.Validated;
import javax.validation.Valid;

@RestController
@Validated
public class UserController {

    @PostMapping("/users")
    public ResponseEntity<String> createUser(@Valid @RequestBody User user) {
        // 处理用户创建逻辑
        return ResponseEntity.ok("User created successfully");
    }
}

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;

@ControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<String> handleValidationExceptions(MethodArgumentNotValidException ex) {
        StringBuilder errors = new StringBuilder();
        ex.getBindingResult().getAllErrors().forEach((error) -> {
            String errorMessage = error.getDefaultMessage();
            errors.append(errorMessage).append("; ");
        });
        return new ResponseEntity<>(errors.toString(), HttpStatus.BAD_REQUEST);
    }
}