1.pom引入

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

2.实体类定义校验规则

public class User {

	@NotEmpty(message = "不能为空")
	private String name;
	@Pattern(regexp = "[0-9]*[a-z]*[0-9]*",message = "格式错误")
	private String pwd;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPwd() {
		return pwd;
	}

	public void setPwd(String pwd) {
		this.pwd = pwd;
	}

}

3.控制类入参加上注解

@RestController
public class TestController {

	@RequestMapping("/valid")
	public String valid(@Validated User user) throws Exception {
		return "";
	}

}

4.定义全局异常处理类

@RestControllerAdvice
public class GlobalExceptionHandle {

	/**
	 * 处理全局异常
	 *
	 * @param e 异常信息
	 * @return
	 */
	@ExceptionHandler(MethodArgumentNotValidException.class)
	public Result customHandler(MethodArgumentNotValidException e) {
		BindingResult bindingResult = e.getBindingResult();
		for (FieldError fieldError : bindingResult.getFieldErrors()) {
			return Result.ofFail(-1, fieldError.getDefaultMessage());
		}
		return Result.ofSuccessMsg("");
	}

}

不定义全局异常处理 进行校验的方式

在方法入参最后加上 BindingResult bindingResult ，然后从bindingResult中获取异常，并进行处理

	@RequestMapping("/valid")
	public String valid(@Validated User user, BindingResult bindingResult) throws Exception {
	if (bindingResult.hasErrors()) {
            for (FieldError fieldError : bindingResult.getFieldErrors()) {
                throw new EarthquakeException(-1, fieldError.getDefaultMessage());
            }
        }
		return "";
	}