Result类(返回类)

原创已于 2023-06-13 09:25:43 修改 · 879 阅读

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#java #数学建模 #mybatis

于 2023-05-24 16:27:11 首次发布

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该文章展示了一个使用Lombok库的@Data注解创建的Java类ReturnResult，用于构建统一的API响应。类包含了状态码(code)，消息(msg)和数据(data)字段，并提供了多个静态工厂方法来方便创建成功或错误的响应实例。

import lombok.Data;

/**
 * 自定义响应结构
 */
@Data
public class ReturnResult<T> {

    private int code;
    private String msg;
    private T data;

    public static <T> ReturnResult<T> success() {
        ReturnResult result = new ReturnResult<T>();
        result.setCode(200);
        result.setMsg("成功");
        return result;
    }

    public static <T> ReturnResult<T> success(T data) {
        ReturnResult result = new ReturnResult<T>(data);
        result.setCode(200);
        result.setMsg("成功");
        return result;
    }


    public static <T> ReturnResult<T> error() {
        ReturnResult result = new ReturnResult<T>();
        result.setCode(2000);
        result.setMsg("服务端异常");
        return result;
    }

    public static <T> ReturnResult<T> error(String msg) {
        ReturnResult result = new ReturnResult<T>(msg);
        result.setCode(2000);
        return result;
    }

    public static <T> ReturnResult<T> error(Integer code, String msg) {
        return new ReturnResult<T>(code, msg);
    }

    public static <T> ReturnResult<T> error(Integer code, String msg, T data) {
        return new ReturnResult<T>(code, msg, data);
    }


    private ReturnResult() {
    }

    private ReturnResult(String msg) {
        this.msg = msg;
        this.data = null;
    }

    private ReturnResult(T data) {
        this.data = data;
    }

    private ReturnResult(Integer code, String msg) {
        this.code = code;
        this.msg = msg;
        this.data = null;
    }

    private ReturnResult(Integer code, String msg, T data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }
}