接口相應返回的json格式工具類

public class ResultDate implements Serializable{

    // 定義jackson對象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    // 響應業務狀態
    private Integer status;

    // 響應消息
    private String msg;

    // 響應中的數據
    private Object data;

    public static ResultDate build(Integer status, String msg, Object data) {
        return new ResultDate(status, msg, data);
    }

    public static ResultDate ok(Object data) {
        return new ResultDate(data);
    }

    public static ResultDate ok() {
        return new ResultDate(null);
    }

    public ResultDate() {

    }

    public static ResultDate build(Integer status, String msg) {
        return new ResultDate(status, msg, null);
    }

    public ResultDate(Integer status, String msg, Object data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public ResultDate(Object data) {
        this.status = 200;
        this.msg = "OK";
        this.data = data;
    }

//    public Boolean isOK() {
//        return this.status == 200;
//    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

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

    public Object getData() {
        return data;
    }

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

    /**
     * 將json結果集轉化爲ResultDate對象
     * 
     * @param jsonData json數據
     * @param clazz ResultDate中的object類型
     * @return
     */
    public static ResultDate formatToPojo(String jsonData, Class<?> clazz) {
        try {
            if (clazz == null) {
                return MAPPER.readValue(jsonData, ResultDate.class);
            }
            JsonNode jsonNode = MAPPER.readTree(jsonData);
            JsonNode data = jsonNode.get("data");
            Object obj = null;
            if (clazz != null) {
                if (data.isObject()) {
                    obj = MAPPER.readValue(data.traverse(), clazz);
                } else if (data.isTextual()) {
                    obj = MAPPER.readValue(data.asText(), clazz);
                }
            }
            return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * 沒有object對象的轉化
     * 
     * @param json
     * @return
     */
    public static ResultDate format(String json) {
        try {
            return MAPPER.readValue(json, ResultDate.class);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * Object是集合轉化
     * 
     * @param jsonData json數據
     * @param clazz 集合中的類型
     * @return
     */
    public static ResultDate formatToList(String jsonData, Class<?> clazz) {
        try {
            JsonNode jsonNode = MAPPER.readTree(jsonData);
            JsonNode data = jsonNode.get("data");
            Object obj = null;
            if (data.isArray() && data.size() > 0) {
                obj = MAPPER.readValue(data.traverse(),
                        MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));
            }
            return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);
        } catch (Exception e) {
            return null;
        }
    }

}