前言

项目开发中异常捕获，抛出,记录，也是非常重要的，便于我们以后项目bug定位追踪，

Hibernate Validator 参数校验

通过整合spring-boot-starter-validation进行全局参数校验

  <!--参数校验-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>

具体使用请参考我这两篇文章

SpringBoot Validation优雅的全局参数校验

SpringBoot Validation详解自定校验和分组校验

全局异常捕获GlobalExceptionHandler

package cn.soboys.core;

import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.core.util.StrUtil;
import cn.soboys.core.authentication.AuthenticationException;
import cn.soboys.core.ret.Result;
import cn.soboys.core.ret.ResultCode;
import cn.soboys.core.ret.ResultResponse;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.NoHandlerFoundException;

import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import javax.validation.Path;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * @author kenx
 * @version 1.0
 * @date 2021/6/17 20:19
 * 全局异常统一处理
 */
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 处理 json 请求体调用接口对象参数校验失败抛出的异常
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public Result jsonParamsException(MethodArgumentNotValidException e) {
        BindingResult bindingResult = e.getBindingResult();
        List errorList = CollectionUtil.newArrayList();

        for (FieldError fieldError : bindingResult.getFieldErrors()) {
            String msg = String.format("%s%s；", fieldError.getField(), fieldError.getDefaultMessage());
            errorList.add(msg);
        }
        return ResultResponse.failure(ResultCode.PARAMS_IS_INVALID, errorList);
    }


    /**
     * 处理单个参数校验失败抛出的异常
     */
    @ExceptionHandler(ConstraintViolationException.class)
    public Result ParamsException(ConstraintViolationException e) {

        List errorList = CollectionUtil.newArrayList();
        Set<ConstraintViolation<?>> violations = e.getConstraintViolations();
        for (ConstraintViolation<?> violation : violations) {
            StringBuilder message = new StringBuilder();
            Path path = violation.getPropertyPath();
            String[] pathArr = StrUtil.splitToArray(path.toString(), ".");
            String msg = message.append(pathArr[1]).append(violation.getMessage()).toString();
            errorList.add(msg);
        }
        return ResultResponse.failure(ResultCode.PARAMS_IS_INVALID, errorList);
    }

    /**
     * @param e
     * @return 处理 form data方式调用接口对象参数校验失败抛出的异常
     */
    @ExceptionHandler(BindException.class)
    public Result formDaraParamsException(BindException e) {
        List<FieldError> fieldErrors = e.getBindingResult().getFieldErrors();
        List<String> collect = fieldErrors.stream()
                .map(o -> o.getField() + o.getDefaultMessage())
                .collect(Collectors.toList());
        return ResultResponse.failure(ResultCode.PARAMS_IS_INVALID, collect);
    }

    /**
     * 请求方法不被允许异常
     */
    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    public Result httpRequestMethodNotSupportedException(HttpRequestMethodNotSupportedException e) {
        return ResultResponse.failure(ResultCode.METHOD_NOT_ALLOWED);
    }

    /**
     * @param e
     * @return Content-Type/Accept 异常
     * application/json
     * application/x-www-form-urlencoded
     */
    @ExceptionHandler(HttpMediaTypeNotSupportedException.class)
    public Result httpMediaTypeNotSupportedException(HttpMediaTypeNotSupportedException e) {
        return ResultResponse.failure(ResultCode.BAD_REQUEST);
    }

    /**
     * handlerMapping  接口不存在跑出异常
     *
     * @param e
     * @return
     */
    @ExceptionHandler(NoHandlerFoundException.class)
    public Result noHandlerFoundException(NoHandlerFoundException e) {
        return ResultResponse.failure(ResultCode.NOT_FOUND, e.getMessage());
    }


    /**
     * 认证异常
     * @param e
     * @return
     */
    @ExceptionHandler(AuthenticationException.class)
    public Result UnNoException(AuthenticationException e) {
        return ResultResponse.failure(ResultCode.UNAUTHORIZED,e.getMessage());
    }

    /**
     *
     * @param e 未知异常捕获
     * @return
     */
    @ExceptionHandler(Exception.class)
    public Result UnNoException(Exception e) {
        return ResultResponse.failure(ResultCode.INTERNAL_SERVER_ERROR, e.getMessage());
    }
}

具体详细使用请参考我这篇文章 SpringBoot优雅的全局异常处理

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