自定义响应结构

import java.util.List;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
* 自定义响应结构
*/
public class TaotaoResult {

// 定义jackson对象
private static final ObjectMapper MAPPER = new ObjectMapper();

// 响应业务状态
private Integer status;

// 响应消息
private String msg;

// 响应中的数据
private Object data;

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

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

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

public TaotaoResult() {

}

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

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

public TaotaoResult(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;
}

/**
* 将json结果集转化为TaotaoResult对象
*
* @param jsonData json数据
* @param clazz TaotaoResult中的object类型
* @return
*/
public static TaotaoResult formatToPojo(String jsonData, Class<?> clazz) {
try {
if (clazz == null) {
return MAPPER.readValue(jsonData, TaotaoResult.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;
}
}

/**
* 没有object对象的转化
*
* @param json
* @return
*/
public static TaotaoResult format(String json) {
try {
return MAPPER.readValue(json, TaotaoResult.class);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* Object是集合转化
*
* @param jsonData json数据
* @param clazz 集合中的类型
* @return
*/
public static TaotaoResult 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;
}
}

}