springboot项目实用插件

ResultJson.java（数据返回格式）

package com.example.server_assess.utils;

import com.example.server_assess.constants.Constant;

public class ResultJson<T> {

    private Integer code;
    private String msg;
    private T data;

    /**
     * 指定状态码和提示信息
     */
    public ResultJson(Integer code, String msg, T data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }

    public ResultJson() {
        this.code = Constant.SUCCESS_CODE;
        this.msg = Constant.SUCCESS_MSG;
    }

    public ResultJson(Integer code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    public ResultJson(T data) {
        this.data = data;
        this.code = Constant.SUCCESS_CODE;
        this.msg = Constant.SUCCESS_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;
    }

    public T getData() {
        return data;
    }

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

controller中使用：

@RestController
@RequestMapping("/demo")
public class DemoController {
	@Autowired
    DemoService demoService;
	@PostMapping("/getDemoList")
	public ResultJson getDemoList(@RequestBody Map<String, Object> params){
		List<Map<String, Object>> list = new ArrayList<>();
		// 失败返回
		return new ResultJson<>(404, "查询数据失败");
		// 成功返回
		return new ResultJson<>(list);
	}
}