Java后端数据返回通用类

第一种（简单定义）

import lombok.Data;
import java.util.HashMap;
import java.util.Map;

/**
 * 结果数据返回通用类
 * @author : 其然乐衣Letitbe
 * @date : 2022/7/20
 */

@Data
public class JsonResult<T> {
    /**
     *  编码：200成功，500和其它数字为失败或其他异常情况
     **/
    private Integer code;
    /**
     * 返回描述信息
     **/
    private String msg;
    /**
     * 信息返回数据
     **/
    private T data;
    /**
     *  动态数据
     **/

    private Map map = new HashMap();

    public JsonResult() {

    }

    public JsonResult(Integer code) {
        this.code = code;
    }

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

    public static <T> JsonResult<T> success(String msg, T object) {
        JsonResult<T> result = new JsonResult<T>();
        result.msg = msg;
        result.data = object;
        result.code = 200;
        return result;
    }

    public static <T> JsonResult<T> success(String msg, Integer code) {
        JsonResult result = new JsonResult();
        result.msg = msg;
        result.code = code;
        return result;
    }

    public static <T> JsonResult<T> success( Integer code) {
        JsonResult result = new JsonResult();
        result.code = code;
        return result;
    }

    public static <T> JsonResult<T> success(String msg) {
        JsonResult<T> result = new JsonResult<T>();
        result.msg = msg;
        result.code = 200;
        return result;
    }

    public static <T> JsonResult<T> success() {
        JsonResult<T> result = new JsonResult<T>();
        result.code = 200;
        return result;
    }

    public static <T> JsonResult<T> error(String msg, Integer code) {
        JsonResult result = new JsonResult();
        result.msg = msg;
        result.code = code;
        return result;
    }

    public static <T> JsonResult<T> error(Integer code) {
        JsonResult result = new JsonResult();
        result.code = code;
        return result;
    }

    public static <T> JsonResult<T> error() {
        JsonResult result = new JsonResult();
        result.code = 500;
        return result;
    }

    public JsonResult<T> add(String key, Object value) {
        this.map.put(key, value);
        return this;
    }
}

第二种

导入依赖

<dependency>
            <groupId>io.swagger</groupId>
            <artifactId>swagger-annotations</artifactId>
            <version>1.5.13</version>
            <scope>compile</scope>
</dependency>

编写结果数据通用类

import com.fasterxml.jackson.annotation.JsonInclude;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

import java.io.Serializable;

/**
 * todo JsonInclude 注解忽略 null值 看业务需求添加
 */
@ApiModel("分页响应参数")
@JsonInclude(value = JsonInclude.Include.NON_EMPTY)
@Data
public class JsonResult<T> implements Serializable {
    private static final long serialVersionUID = 1L;

    @ApiModelProperty(value = "结果状态", example = "200")
    private Integer code = 200;
    @ApiModelProperty(value = "结果数据")
    private T data;
    @ApiModelProperty(value = "结果描述", example = "成功")
    private String message = "ok";

    public JsonResult() {
    }

    public JsonResult(Integer code) {
        this();
        this.code = code;
    }

    public JsonResult(Integer code, T data) {
        this(code);
        this.data = data;
    }

    public JsonResult(Integer code, String message) {
        this(code);
        this.message = message;
    }

    public JsonResult(Integer code, String message, T data) {
        this(code, message);
        this.data = data;
    }

    public static <T> JsonResult<T> success() {
        return new JsonResult(200);
    }

    public static <T> JsonResult<T> success(T data) {
        return new JsonResult(200, data);
    }

    public static <T> JsonResult<T> success(String message, T data) {
        return new JsonResult(200, message, data);
    }

    public static <T> JsonResult<T> success(Integer code, String message, T data) {
        return new JsonResult(code, message, data);
    }

    public static JsonResult<String> error() {
        return new JsonResult(500);
    }

    public static <T> JsonResult<T> error(String message) {
        return new JsonResult(500, message);
    }

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

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


}