异常分为以下三种
下面具体说明如何分类处理,从而保证无论触发什么异常均可返回理想的自定义数据格式
/**
* Created by mrt on 2018/3/5.
* 10000-- 通用错误代码
* 22000-- 媒资错误代码
* 23000-- 用户中心错误代码
* 24000-- cms错误代码
* 25000-- 文件系统
*/
public interface ResultCode {
//操作是否成功,true为成功,false操作失败
boolean success();
//操作代码
int code();
//提示信息
String message();
}
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
@Data
@ToString
@NoArgsConstructor
public class ResponseResult implements Response {
//操作是否成功
boolean success = SUCCESS;
//操作代码
int code = SUCCESS_CODE;
//提示信息
String message;
public ResponseResult(ResultCode resultCode) {
this.success = resultCode.success();
this.code = resultCode.code();
this.message = resultCode.message();
}
public static ResponseResult SUCCESS() {
return new ResponseResult(CommonCode.SUCCESS);
}
public static ResponseResult FAIL() {
return new ResponseResult(CommonCode.FAIL);
}
}
import com.xuecheng.framework.model.response.ResultCode;
/**
* 自定义异常
*
* @author john
* @date 2019/12/20 - 10:57
*/
public class CustomException extends RuntimeException {
private ResultCode resultCode;
public CustomException(ResultCode resultCode) {
//异常信息为错误代码+异常信息
super("错误代码:" + resultCode.code() + "错误信息:" + resultCode.message());
this.resultCode = resultCode;
}
public ResultCode getResultCode() {
return this.resultCode;
}
}
import lombok.ToString;
@ToString
public enum CommonCode implements ResultCode{
INVALID_METHOD(false,10004,"非法方法!"),
INVALID_PARAM(false,10003,"非法参数!"),
SUCCESS(true,10000,"操作成功!"),
FAIL(false,11111,"操作失败!"),
UNAUTHENTICATED(false,10001,"此操作需要登陆系统!"),
UNAUTHORISE(false,10002,"权限不足,无权操作!"),
SERVER_ERROR(false,99999,"抱歉,系统繁忙,请稍后重试!");
// private static ImmutableMap<Integer, CommonCode> codes ;
//操作是否成功
boolean success;
//操作代码
int code;
//提示信息
String message;
private CommonCode(boolean success,int code, String message){
this.success = success;
this.code = code;
this.message = message;
}
@Override
public boolean success() {
return success;
}
@Override
public int code() {
return code;
}
@Override
public String message() {
return message;
}
}
import com.google.common.collect.ImmutableMap;
import com.xuecheng.framework.model.response.CommonCode;
import com.xuecheng.framework.model.response.ResponseResult;
import com.xuecheng.framework.model.response.ResultCode;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* @author john
* @date 2019/12/20 - 11:01
*/
@Slf4j
@ControllerAdvice
public class ExceptionCatch {
//使用EXCEPTIONS存放异常类型和错误代码的映射,ImmutableMap的特点的一旦创建不可改变,并且线程安全
private static ImmutableMap<Class<? extends Throwable>, ResultCode> EXCEPTIONS;
//使用builder来构建一个异常类型和错误代码的异常
protected static ImmutableMap.Builder<Class<? extends Throwable>, ResultCode> builder =
ImmutableMap.builder();
static {
//在这里加入一些基础的异常类型判断---异常存在非自定义异常
// 参数异常
// 请求方法异常
builder.put(HttpMessageNotReadableException.class, CommonCode.INVALID_PARAM);
builder.put(HttpRequestMethodNotSupportedException.class, CommonCode.INVALID_METHOD);
}
//捕获 CustomException异常
@ExceptionHandler(CustomException.class)
@ResponseBody
public ResponseResult customException(CustomException e) {
log.error("catch exception : {}\r\nexception: ", e.getMessage(), e);
ResultCode resultCode = e.getResultCode();
return new ResponseResult(resultCode);
}
//捕获Exception异常---非自定义异常
@ResponseBody
@ExceptionHandler(Exception.class)
public ResponseResult exception(Exception e) {
log.error("catch exception : {}\r\nexception: ", e.getMessage(), e);
if (EXCEPTIONS == null)
EXCEPTIONS = builder.build();
// 查看异常是否被定义返回格式---没有就返回默认错误格式
final ResultCode resultCode = EXCEPTIONS.get(e.getClass());
final ResponseResult responseResult;
if (resultCode != null) {
responseResult = new ResponseResult(resultCode);
} else {
responseResult = new ResponseResult(CommonCode.SERVER_ERROR);
}
return responseResult;
}
}
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