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

    /**
     * 學(xué)生姓名
     */
    @NotBlank(message = "{name.notBlank}")
    @Length(min = 2,max = 19,message="{name.length}")
    private String name;

@RestController
@RequestMapping("/test")
@Validated
public class TestController {
    @PostMapping("/user")
    public ResponseResult<String> user(@Valid @RequestBody Student student) {
        return new ResponseResult<>("userToken");
    }
}

import com.example.demo.util.HttpCodeEnum;
import com.example.demo.util.ResponseResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.util.CollectionUtils;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
@RestControllerAdvice
public class GlobalExceptionHandler {
    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
    @Autowired
    private HttpServletRequest httpServletRequest;
    private final String sysError="系統(tǒng)出錯(cuò)";
    // get請(qǐng)求的對(duì)象參數(shù)校驗(yàn)異常
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler({MissingServletRequestParameterException.class})
    public ResponseResult bindExceptionHandler(MissingServletRequestParameterException e) {
        String requestURI = httpServletRequest.getRequestURI();
        log.error("請(qǐng)求地址'{}',get方式請(qǐng)求參數(shù)'{}'必傳", requestURI,e.getParameterName());
        return ResponseResult.errorResult(HttpCodeEnum.SYSTEM_ERROR.getCode(), e.getMessage());
    }
    // post請(qǐng)求的對(duì)象參數(shù)校驗(yàn)異常
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler({MethodArgumentNotValidException.class})
    public ResponseResult methodArgumentNotValidHandler(MethodArgumentNotValidException e) {
        String requestURI = httpServletRequest.getRequestURI();
        log.error("請(qǐng)求地址'{}',post方式請(qǐng)求參數(shù)異常'{}'", requestURI, e.getMessage());
        List<ObjectError> allErrors = e.getBindingResult().getAllErrors();
        return ResponseResult.errorResult(HttpCodeEnum.SYSTEM_ERROR.getCode(), getValidExceptionMsg(allErrors));
    }
    private String getValidExceptionMsg(List<ObjectError> errors) {
        if(!CollectionUtils.isEmpty(errors)){
            StringBuilder sb = new StringBuilder();
            errors.forEach(error -> {
                if (error instanceof FieldError) {
                    sb.append(((FieldError)error).getField()).append(":");
                }
                sb.append(error.getDefaultMessage()).append(";");
            });
            String msg = sb.toString();
            msg = msg.substring(0, msg.length() -1);
            return msg;
        }
        return null;
    }
}