package net.cyb.demo.handler;

import net.cyb.demo.utils.JsonData;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.servlet.http.HttpServletRequest;

/**
 * 标记这是一个异常处理类
 */
@RestControllerAdvice
public class CustomExtHandler {
    @ExceptionHandler(value = Exception.class)
    JsonData HandlerException(Exception e, HttpServletRequest request){
        return JsonData.buildError(-2,"服务端出问题了");
    }
}

package net.cyb.demo.utils;

/**
 * 接口返回工具类
 */
public class JsonData {
    private int code;
    private Object data;
    private String msg;

    public JsonData() {
    }

    public JsonData(int code, Object data) {
        this.code = code;
        this.data = data;
    }

    public JsonData(int code, Object data, String msg) {
        this.code = code;
        this.data = data;
        this.msg = msg;
    }

    public static JsonData buildSuccess(Object data) {
        return new JsonData(0, data);
    }

    public static JsonData buildError(String msg) {
        return new JsonData(-1, "", msg);
    }

    public static JsonData buildError(int code, String msg) {
        return new JsonData(code, "", msg);
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    @Override
    public String toString() {
        return "JsonData{" +
                "code=" + code +
                ", data=" + data +
                ", msg=‘" + msg + ‘\‘‘ +
                ‘}‘;
    }
}