java编写自定义异常类,统一异常处理

最新推荐文章于 2025-07-09 11:14:09 发布

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本文介绍了一种自定义异常处理机制的实现方式，通过创建MyBaseException类来封装错误信息，并利用GlobalExceptionHandler进行全局异常捕获，最后通过ResponseData统一响应格式。这种机制能够有效提升代码的健壮性和可维护性。

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/**
* 自定义异常类
*/
public class MyBaseException extends RuntimeException{

    private static final long serialVersionUID = 1L;

    public MyBaseException() {
    }

    public MyBaseException(String message) {
        super(message);
    }

}

程序中调用 throw new MyBaseException("异常信息");

@RestControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler(MyBaseException .class)
    public ResponseData exceptionHandler(DateException             
      exception){
       return handleErrorInfo(exception.getMessage(), "199", exception);
    }
}

private ResponseData<String> handleErrorInfo(String message, String code, Exception exception) {
        exception.printStackTrace();
        return ResponseData.error(code, message);
    }

@Getter
@AllArgsConstructor(access = AccessLevel.PROTECTED)
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@JsonInclude(JsonInclude.Include.NON_EMPTY)
public class ResponseData<T> implements Serializable {

    @ApiModelProperty(value="返回码-200成功",name="code",example="200", required=true)
    private String code;

    @ApiModelProperty(value="返回描述",name="msg",example="success", required=true)
    private String msg;

    @ApiModelProperty(value="返回数据",name="data")
    private T data;

    public static ResponseData success(){
        ResponseData responseData = new ResponseData();
        responseData.code = "200";
        responseData.msg = "success";
        return responseData;
    }

    public static ResponseData success(String message){
        ResponseData responseData = new ResponseData();
        responseData.code = "200";
        responseData.msg = message;
        return responseData;
    }

    public ResponseData setData(T t){
        this.data = t;
        return this;
    }

    public static ResponseData error(String errorMsg){
        ResponseData responseData = new ResponseData();
        responseData.code = "999";
        responseData.msg = errorMsg;
        return responseData;
    }

    public static ResponseData error(String code, String errorMsg){
        ResponseData responseData = new ResponseData();
        responseData.code = code;
        responseData.msg = errorMsg;
        return responseData;
    }
}