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一、异常处理类

/*** 异常处理类*/
@ControllerAdvice//全局异常处理
public class CustomExceptionHandler {//记录日志private final static Logger logger = LoggerFactory.getLogger(CustomExceptionHandler.class);@ExceptionHandler(value = Exception.class)//处理那类的异常@ResponseBody//响应数据给前端public JsonData handle(Exception e) {logger.error("[ 系统异常 ]{}", e);//如果除了异常则记录if (e instanceof LCYException) {//如果属于自定义异常（XDException为我们自己设置的异常）LCYException lcyException = (LCYException) e;//扔出自定义的jsondata的code值和msgreturn JsonData.buildError(lcyException.getCode(), lcyException.getMsg());} else {return JsonData.buildError("全局异常，未知错误");//全局异常则扔出错误信息因为code已被定义}}
}

二、自定义异常类

/*** 自定义异常类*/
public class LCYException extends RuntimeException {private Integer code;private String msg;public LCYException(Integer code, String msg) {this.code = code;this.msg = msg;}public Integer getCode() {return code;}public void setCode(Integer code) {this.code = code;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}
}