springBoot之自定义异常，返回对象

最新推荐文章于 2023-03-30 08:00:00 发布

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最新推荐文章于 2023-03-30 08:00:00 发布

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分类专栏： spring boot

本文链接：https://blog.youkuaiyun.com/samHuangLiang/article/details/88530834

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本文介绍了一种自定义异常类MyException及其在Spring MVC控制器中的应用，通过UserController类展示了如何使用自定义异常来处理业务逻辑错误，并返回带有错误信息的响应对象MyResponse。此外，还介绍了MyResponse类的实现，用于统一API接口的响应格式。

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package com.huangliang.test.core;

public class MyException extends RuntimeException {
    private String errorCode;
    private String msg;

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

    public MyException(String errorCode, String msg) {
        this.errorCode = errorCode;
        this.msg = msg;
    }

    public String getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(String errorCode) {
        this.errorCode = errorCode;
    }

    public String getMsg() {
        return msg;
    }

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

package com.huangliang.test.core;

public class MyResponse<T> {
    private String code;
    private String msg;
    private String error;
    private T data;

    public MyResponse(T data) {
        this.code = "200";
        this.msg = "获取成功";
        this.error = "";
        this.data = data;
    }

    public MyResponse(String code, String msg, String error, T data) {
        this.code = code;
        this.msg = msg;
        this.error = error;
        this.data = data;
    }

    public String getCode() {
        return code;
    }

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

    public String getMsg() {
        return msg;
    }

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

    public String getError() {
        return error;
    }

    public void setError(String error) {
        this.error = error;
    }

    public T getData() {
        return data;
    }

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


}

package com.huangliang.test.modules.user.controller;

import com.huangliang.test.core.MyException;
import com.huangliang.test.core.MyResponse;
import com.huangliang.test.modules.user.domain.User;
import com.huangliang.test.modules.user.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
public class UserController {
    @Autowired
    private UserService userService;


    @RequestMapping(name = "/user/list", method = RequestMethod.GET)
    @ResponseBody
    public MyResponse getUserList() {
        List<User> list = userService.getUserList();
        if (list == null) {
            throw new MyException("获取对象为空");
        }
        return new MyResponse(list);
    }
}

返回数据：

{
    "code": "200",
    "msg": "获取成功",
    "error": "",
    "data": [
        {
            "id": 1,
            "name": "sam",
            "phone": "15928005689",
            "age": 22
        },
        {
            "id": 2,
            "name": "summer",
            "phone": "18302895614",
            "age": 25
        },
        {
            "id": 3,
            "name": "wang",
            "phone": "18756894422",
            "age": 24
        }
    ]
}