spring boot GlobalExceptionHandler @RestControllerAdvice @ExceptionHandler

package me.zhengjie.common.exception.handler;

import lombok.extern.slf4j.Slf4j;
import me.zhengjie.common.exception.BadRequestException;
import me.zhengjie.common.exception.EntityExistException;
import me.zhengjie.common.exception.EntityNotFoundException;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import java.io.PrintWriter;
import java.io.StringWriter;
import static org.springframework.http.HttpStatus.BAD_REQUEST;
import static org.springframework.http.HttpStatus.FORBIDDEN;
import static org.springframework.http.HttpStatus.NOT_FOUND;

/**
 * @author jie
 * @date 2018-11-23
 */
@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 处理所有不可知的异常
     * @param e
     * @return
     */
    @ExceptionHandler(Exception.class)
    public ResponseEntity handleException(Exception e){
        // 打印堆栈信息
        log.error(getStackTrace(e));
        ApiError apiError = new ApiError(BAD_REQUEST.value(),e.getMessage());
        return buildResponseEntity(apiError);
    }

    /**
     * 处理 接口无权访问异常AccessDeniedException
     * @param e
     * @return
     */
    @ExceptionHandler(AccessDeniedException.class)
    public ResponseEntity handleAccessDeniedException(AccessDeniedException e){
        // 打印堆栈信息
        log.error(getStackTrace(e));
        ApiError apiError = new ApiError(FORBIDDEN.value(),e.getMessage());
        return buildResponseEntity(apiError);
    }

    /**
     * 处理自定义异常
     * @param e
     * @return
     */
    @ExceptionHandler(value = BadRequestException.class)
    public ResponseEntity<ApiError> badRequestException(BadRequestException e) {
        // 打印堆栈信息
        log.error(getStackTrace(e));
        ApiError apiError = new ApiError(e.getStatus(),e.getMessage());
        return buildResponseEntity(apiError);
    }

    /**
     * 处理 EntityExist
     * @param e
     * @return
     */
    @ExceptionHandler(value = EntityExistException.class)
    public ResponseEntity<ApiError> entityExistException(EntityExistException e) {
        // 打印堆栈信息
        log.error(getStackTrace(e));
        ApiError apiError = new ApiError(BAD_REQUEST.value(),e.getMessage());
        return buildResponseEntity(apiError);
    }

    /**
     * 处理 EntityNotFound
     * @param e
     * @return
     */
    @ExceptionHandler(value = EntityNotFoundException.class)
    public ResponseEntity<ApiError> entityNotFoundException(EntityNotFoundException e) {
        // 打印堆栈信息
        log.error(getStackTrace(e));
        ApiError apiError = new ApiError(NOT_FOUND.value(),e.getMessage());
        return buildResponseEntity(apiError);
    }

    /**
     * 处理所有接口数据验证异常
     * @param e
     * @returns
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<ApiError> handleMethodArgumentNotValidException(MethodArgumentNotValidException e){
        // 打印堆栈信息
        log.error(getStackTrace(e));
        String[] str = e.getBindingResult().getAllErrors().get(0).getCodes()[1].split("\.");
        StringBuffer msg = new StringBuffer(str[1]+":");
        msg.append(e.getBindingResult().getAllErrors().get(0).getDefaultMessage());
        ApiError apiError = new ApiError(BAD_REQUEST.value(),msg.toString());
        return buildResponseEntity(apiError);
    }

    /**
     * 统一返回
     * @param apiError
     * @return
     */
    private ResponseEntity<ApiError> buildResponseEntity(ApiError apiError) {
        return new ResponseEntity(apiError, HttpStatus.valueOf(apiError.getStatus()));
    }

    /**
     * 获取堆栈信息
     * @param throwable
     * @return
     */
    private String getStackTrace(Throwable throwable)
    {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        try {
            throwable.printStackTrace(pw);
            return "
"+sw.toString();
        } finally {
            pw.close();
        }
    }
}

package me.zhengjie.common.exception.handler;

import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;
import java.time.LocalDateTime;

/**
 * @author jie
 * @date 2018-11-23
 */
@Data
class ApiError {

    private Integer status;
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime timestamp;
    private String message;

    private ApiError() {
        timestamp = LocalDateTime.now();
    }

    public ApiError(Integer status,String message) {
        this();
        this.status = status;
        this.message = message;
    }
}