全局异常处理

package cn.com.dwr.common.exception;

import cn.com.dwr.common.lang.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.NoHandlerFoundException;

/**
 * 全局异常处理
 */
@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = HubException.class)
    public Result handler(HubException e){
        log.error("自定义异常 ----- {}", e.getMessage());
        return Result.fail(e.getMessage());
    }

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = RuntimeException.class)
    public Result handler(RuntimeException e){
        log.error("运行时异常 ----- {}", e.getMessage());
        // 打印错误到控制台
        e.printStackTrace();
        return Result.fail(e.getMessage());
    }

    @ResponseStatus(HttpStatus.NOT_FOUND)
    @ExceptionHandler(value = NoHandlerFoundException.class)
    public Result handler(NoHandlerFoundException e){
        log.error("路径不存在异常 ----- {}", e.getMessage());
        return Result.fail(e.getMessage());
    }

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = BindException.class)
    public Result handler(BindException e){
        BindingResult bindingResult = e.getBindingResult();
        ObjectError objectError = bindingResult.getAllErrors().stream().findFirst().get();

        log.error("实体校验异常 ----- {}", objectError.getDefaultMessage());
        return Result.fail(objectError.getDefaultMessage());
    }
}