- 首先，利用枚举，来定义异常类型。定义枚举ResultEnum：
package org.sqlb.enums;
/**
* 利用枚举来 指定错误码
*/
public enum ResultEnum {
SUCCESS_RESULT(1,"成功"),
ERROR_RESULT(2,"参数错误"),
;
private Integer status;
private String message;
ResultEnum(Integer status, String message) {
this.status = status;
this.message = message;
}
public Integer getStatus() {
return status;
}
public String getMessage() {
return message;
}
}
- 自定义异常，新建CustomException类：
package org.sqlb.exception;
import org.sqlb.enums.ResultEnum;
/**
* 自定义异常类，添加一个status字段
* 这里只能继承 RuntimeException 类，因为，spring只对该异常做了事物回滚
*/
public class CustomException extends RuntimeException {
private Integer status;
public CustomException(ResultEnum resultEnum) {
super(resultEnum.getMessage());
this.status = resultEnum.getStatus();
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
}
- 统一处理异常，定义ExceptionHandle类。之所以统一定义异常处理类，是因为，我们可以通过catch异常，来给前端提供一个规范的数据返回引导，便于前端对异常进行处理，从而给用户一个较好的体验。
package org.sqlb.handle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.sqlb.bean.Result;
import org.sqlb.exception.CustomException;
import org.sqlb.utils.ResultUtil;
/**
* 统一异常处理
*/
@ControllerAdvice
public class ExceptionHandle {
private static final Logger logger = LoggerFactory.getLogger(ExceptionHandle.class);
@ExceptionHandler(value = Exception.class)
@ResponseBody
public Result handle(Exception e) {
//在异常里面进行返回数据的处理
if (e instanceof CustomException) {
CustomException ex = (CustomException) e;
return ResultUtil.error(ex.getStatus(), e.getMessage());
}
logger.info("[系统异常]" ,e);
return ResultUtil.error(-1, "位置错误");
}
}
附录:
Result类：
package org.sqlb.bean;
/**
* 请求返回结果 统一结构 类
*/
public class Result<T> {
private Integer status;
private String message;
private T result;
public Result() {
}
public Result(Integer status, String message, T result) {
this.status = status;
this.message = message;
this.result = result;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public T getResult() {
return result;
}
public void setResult(T result) {
this.result = result;
}
}
ResultUtil类：
package org.sqlb.utils;
import org.sqlb.bean.Result;
/**
*统一处理response结果
*/
public class ResultUtil {
public static Result success(Object obj) {
Result result = new Result();
result.setResult(obj);
result.setStatus(1);
result.setMessage("成功");
return result;
}
public static Result success() {
return success(null);
}
public static Result error(Integer status,String message) {
Result result = new Result();
result.setStatus(status);
result.setMessage(message);
return result;
}
}
