异常处理，对外接口封装

异常统一捕获和处理，还有数据统一的封装。这个是在项目里面经常会用到。所以我写了一个。以供自己方便使用。当一个笔记的编写。

1、BaseExcpetion，是异常基本运行时异常。

package com.test.cn;


/**
 * 封装运行时异常
 * 
 * @author BlockChain
 *
 */
public class BaseException extends RuntimeException {
	private static final long serialVersionUID = -6693895810786471043L;
	
	/**
	 * 错误码，相关定义规范请参考《异常定义规范》
	 */
	private String errorcode;

	public BaseException(String errorcode,String message,Throwable e) {
		super(message,e);
		this.errorcode = errorcode;
	}

	public String getErrorcode() {
		return errorcode;
	}
}

2、BusinessException是业务性异常。

package com.test.cn;

/**
 * 封装业务异常，一般在正常情况下产生， 开发人员需要根据情况分别处理
 */
public class BusinessException extends Exception {
	private static final long serialVersionUID = -1986655358889488649L;
	/**
	 * 错误码，相关定义规范请参考《异常定义规范》
	 */
	private String errorcode;

	public BusinessException(String errorcode,String message,Throwable e) {
		super(message,e);
		this.errorcode = errorcode;
	}

	public String getErrorcode() {
		return errorcode;
	}
}

3、ResponseBaseObject， 是一个定义的基本类。

package com.test.cn;

import java.io.Serializable;

/**
 * 对外返值的基本类
 * @author BlockChain
 *
 * @param 
 */
public class ResponseBaseObject implements Serializable {

	/**
	 * 
	 */
	private static final long serialVersionUID = 5727186334451864680L;
	
	private String code;
	private Boolean success;
	private String msg;
	private T data;
	public String getCode() {
		return code;
	}
	public void setCode(String code) {
		this.code = code;
	}
	public Boolean getSuccess() {
		return success;
	}
	public void setSuccess(Boolean success) {
		this.success = success;
	}
	public String getMsg() {
		return msg;
	}
	public void setMsg(String msg) {
		this.msg = msg;
	}
	public T getData() {
		return data;
	}
	public void setData(T data) {
		this.data = data;
	}
}

4、 ResponseObject，对异常和返回值进行封装。

package com.test.cn;

/**
 * 
 * 
 * @author BlockChain
 *
 * @param 
 */
public class ResponseObject extends ResponseBaseObject {

	/**
	 * 
	 */
	private static final long serialVersionUID = 5981132252304075190L;

	protected static final String SUCCESS_CODE = "0";//成功
	//无参构造，专门做框架时候要用到，其实这里可以指定为private 但是有可能有特殊的情况，所以为了方便就该成了公开的权限了
	public ResponseObject() {}
	//有参数的构造也是。。尽量使用下面的静态方法
	public ResponseObject(Boolean issucce,String code,String msg,T resultObj) {
		if (issucce) {
			this.setCode(code);
		}else {
			this.setCode(code);
			this.setMsg(msg);
		}
		this.setCode(code);
		this.setData(resultObj);
	}
	//成功
	public static  ResponseObject success(){
		return new ResponseObject(true, SUCCESS_CODE, null, null);
	}
	
	/**
	 * 成功 
	 * 
	 * @param data
	 * @return
	 */
	public static  ResponseObject success(T resultObj){
		return new ResponseObject(true, SUCCESS_CODE, null, resultObj);
	}
	
	
	/**
	 * 运行时，业务异常
	 * 
	 * @param e
	 * @return
	 */
	public static  ResponseObject failBaseRuntimeException(BaseException e){
		return new ResponseObject(false, e.getErrorcode(), e.getMessage(), null);
	}
	
	/**
	 * 返回失败，未被定义的业务错误
	 * 
	 * @param e
	 * @return
	 */
	public static  ResponseObject failRuntimeException(RuntimeException e){
		if (e instanceof BaseException) {
			return failBaseRuntimeException((BaseException)e);
		}else {
			return new ResponseObject(false, "EX101", e.getMessage(), null);
		}
	}
	
	public static void checkBusinessException(ResponseObject resp)throws BusinessException{
		if(!resp.getSuccess()&&!"0".equals(resp.getCode())) {
			String errorCode = resp.getCode()+"";
			if (errorCode.startsWith("EX")) {
				throw new BaseException(errorCode, resp.getMsg(), null);
			}else {
				throw new BusinessException(errorCode, resp.getMsg(), null);
			}
		}
	}
	
	public static void checkRuntimeException(ResponseObject resp) {
		if (!resp.getSuccess()&&!"0".equals(resp.getCode())) {
			String errorCode = resp.getCode()+"";
			if (errorCode.startsWith("EX")) {
				throw new BaseException(errorCode, resp.getMsg(), null);
			}else {
				BusinessException businessException = new BusinessException(errorCode, resp.getMsg(), null);
				throw new BaseException(errorCode, "EX201", businessException);
			}
		}
	}
	
	public static Exception getThrowException(ResponseObject resp) {
		if (!resp.getSuccess()&&!"0".equals(resp.getCode())) {
			String errorCode = resp.getCode()+"";
			if (errorCode.startsWith("EX")) {
				return new BaseException(errorCode, resp.getMsg(), null);
			}else {
				return new BusinessException(errorCode, resp.getMsg(), null);
			}
		}else {
			return null;
		}
	}
}