Javaの例外処理スパイク戦闘-2-5

1.アイデアの実現

 注釈@ ControllerAdvice、@ ResponseBody修正とGlobleExceptionHandlerを作成、1.1

取得が結合した例外BindExcpetionのgetAllErrorsある場合、処理例外を定義@ExceptionHandler（値= Exception.class）は、異常な他の場合、CodeMsg.BIND_ERRORを返す、パラメータHttpServletRequestの要求、例外E、GlobalException instacneof着信例外のタイプを決定するに合格しますサーバーは、例外を返します。

package com.zengjx.miaosha.exception;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import com.zengjx.miaosha.result.CodeMsg;
import com.zengjx.miaosha.result.Result;
import org.springframework.validation.BindException;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;


@ControllerAdvice
@ResponseBody
public class GlobalExceptionHandler {
	@ExceptionHandler(value=Exception.class)
	public Result<String> exceptionHandler(HttpServletRequest request, Exception e){
		e.printStackTrace();
		if(e instanceof GlobalException) {
			GlobalException ex = (GlobalException)e;
			return Result.error(ex.getCm());
		}else if(e instanceof BindException) {
			BindException ex = (BindException)e;
			List<ObjectError> errors = ex.getAllErrors();
			ObjectError error = errors.get(0);
			String msg = error.getDefaultMessage();
			return Result.error(CodeMsg.BIND_ERROR.fillArgs(msg));
		}else {
			return Result.error(CodeMsg.SERVER_ERROR);
		}
	}
}

1.2。グローバル例外クラスGlobalException継承を定義してのRuntimeException  

package com.zengjx.miaosha.exception;

import com.zengjx.miaosha.result.CodeMsg;

public class GlobalException extends RuntimeException{

	private static final long serialVersionUID = 1L;
	
	private CodeMsg cm;
	
	public GlobalException(CodeMsg cm) {
		super(cm.toString());
		this.cm = cm;
	}

	public CodeMsg getCm() {
		return cm;
	}

}