异常拦截

1.全局参数、异常拦截

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {
//    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 拦截表单参数校验
     */
    @ResponseStatus(HttpStatus.OK)
    @ExceptionHandler({BindException.class})
    public CommonResult bindException(BindException e) {
        BindingResult bindingResult = e.getBindingResult();
        return CommonResult.failed(ExceptionCodeEnum.VALIDATE_FAILED, Objects.requireNonNull(bindingResult.getFieldError()).getDefaultMessage());
    }

    /**
     * 拦截JSON参数校验
     */
    @ResponseStatus(HttpStatus.OK)
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public CommonResult bindException(MethodArgumentNotValidException e) {
        BindingResult bindingResult = e.getBindingResult();
        return CommonResult.failed(ExceptionCodeEnum.VALIDATE_FAILED,Objects.requireNonNull(bindingResult.getFieldError()).getDefaultMessage());
    }

    /**
     * 拦截参数类型不正确
     * @param e
     * @return
     */
    @ResponseStatus(HttpStatus.OK)
    @ExceptionHandler(HttpMediaTypeNotSupportedException.class)
    public CommonResult bindException(HttpMediaTypeNotSupportedException e){
        return CommonResult.failed(ExceptionCodeEnum.PRAM_NOT_MATCH,Objects.requireNonNull(e.getMessage()));
    }


    //声明要捕获的异常
    @ResponseStatus(HttpStatus.OK)
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public <T> CommonResult<?> defaultExceptionHandler(Exception e) {
        e.printStackTrace();
        if(e instanceof CrmebException) {
            return CommonResult.failed(ExceptionCodeEnum.FAILED,Objects.requireNonNull(e.getMessage()));
        }
        if(e instanceof MissingServletRequestParameterException){
            return CommonResult.failed(ExceptionCodeEnum.PRAM_NOT_MATCH, Objects.requireNonNull(e.getMessage()));
        }
        //未知错误
        return CommonResult.failed(ExceptionCodeEnum.ERROR,e.getMessage());
    }
}

 

业务异常

@Slf4j
@RestControllerAdvice
public class CrmebException extends RuntimeException {

    private static final long serialVersionUID = 1L;

    public CrmebException() {}

    public CrmebException(String message) {
        super(message);
    }
}

commonResult

import ExceptionCodeEnum;
import ExceptionHandler;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;


public class CommonResult<T> {
    private long code;
    private String message;
    private T data;

    protected CommonResult() {
    }

    protected CommonResult(long code, String message, T data) {
        this.code = code;
        this.message = message;
        this.data = data;
    }

    /**
     * 成功返回结果
     */
    public static <T> CommonResult<T> success() {
        return new CommonResult<T>(ExceptionCodeEnum.SUCCESS.getCode(), ExceptionCodeEnum.SUCCESS.getMessage(), null);
    }

    /**
     * 成功返回结果
     */
    public static <T> CommonResult<T> success(String message) {
        return new CommonResult<T>(ExceptionCodeEnum.SUCCESS.getCode(), message, null);
    }

    /**
     * 成功返回结果
     *
     * @param data 获取的数据
     */
    public static <T> CommonResult<T> success(T data) {
        return new CommonResult<T>(ExceptionCodeEnum.SUCCESS.getCode(), ExceptionCodeEnum.SUCCESS.getMessage(), data);
    }
/**
     * 成功返回结果
     *
     * @param data 获取的数据
     * @param  message 提示信息
     */
    public static <T> CommonResult<T> success(T data, String message) {
        return new CommonResult<T>(ExceptionCodeEnum.SUCCESS.getCode(), message, data);
    }

    /**
     * 失败返回结果
     * @param errorCode 错误码
     */
    public static <T> CommonResult<T> failed(ExceptionHandler errorCode) {
        System.out.println("errorCode1:" + errorCode);
        return new CommonResult<T>(errorCode.getCode(), errorCode.getMessage(), null);
    }

    /**
     * 失败返回结果
     * @param errorCode 错误码
     * @param message 错误信息
     */
    public static <T> CommonResult<T> failed(ExceptionHandler errorCode,String message) {
        System.out.println("errorCode2:" + errorCode);
        return new CommonResult<T>(errorCode.getCode(), message, null);
    }

    /**
     * 失败返回结果
     * @param message 提示信息
     */
    public static <T> CommonResult<T> failed(String message) {
        return new CommonResult<T>(ExceptionCodeEnum.FAILED.getCode(), message, null);
    }

    /**
     * 失败返回结果
     */
    public static <T> CommonResult<T> failed() {
        return failed(ExceptionCodeEnum.FAILED);
    }

    /**
     * 参数验证失败返回结果
     */
    public static <T> CommonResult<T> validateFailed() {
        return failed(ExceptionCodeEnum.VALIDATE_FAILED);
    }

    /**
     * 参数验证失败返回结果
     * @param message 提示信息
     */
    public static <T> CommonResult<T> validateFailed(String message) {
        return new CommonResult<T>(ExceptionCodeEnum.VALIDATE_FAILED.getCode(), message, null);
    }

    /**
     * 未登录返回结果
     */
    public static <T> CommonResult<T> unauthorized(T data) {
        return new CommonResult<T>(ExceptionCodeEnum.UNAUTHORIZED.getCode(), ExceptionCodeEnum.UNAUTHORIZED.getMessage(), data);
    }

    /**
     * 未登录返回结果
     */
    public static <T> CommonResult<T> unauthorized() {
        return new CommonResult<T>(ExceptionCodeEnum.UNAUTHORIZED.getCode(), ExceptionCodeEnum.UNAUTHORIZED.getMessage(), null);
    }

    /**
     * 没有权限查看
     */
    public static <T> CommonResult<T> forbidden() {
        return new CommonResult<T>(ExceptionCodeEnum.FORBIDDEN.getCode(), ExceptionCodeEnum.FORBIDDEN.getMessage(), null);
    }

    /**
     * 未授权返回结果
     */
    public static <T> CommonResult<T> forbidden(T data) {
        return new CommonResult<T>(ExceptionCodeEnum.FORBIDDEN.getCode(), ExceptionCodeEnum.FORBIDDEN.getMessage(), data);
    }

    public long getCode() {
        return code;
    }

    public void setCode(long code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

异常结果

public enum ExceptionCodeEnum implements ExceptionHandler{
    // 数据操作错误定义
    SUCCESS(200, "操作成功"),
    FAILED(500, "操作失败"),
    PRAM_NOT_MATCH(400, "参数不正确"),
    VALIDATE_FAILED(400, "参数检验失败"),
    UNAUTHORIZED(401, "未登录或token过期，请登录！"),
    FORBIDDEN(403, "没有相关权限"),
    NOT_FOUND(404, "没有找到相关数据"),
    ERROR(500, "系统异常"),
    ;

    private long code;
    private String message;

    private ExceptionCodeEnum(long code, String message){
        this.code = code;
        this.message = message;
    }

    @Override
    public long getCode() {
        return code;
    }

    @Override
    public String getMessage() {
        return message;
    }
}

public interface ExceptionHandler {

    long getCode();

    String getMessage();
}