JSONArry排序 java

标签：

//class1 set方法如果比较的字段都相同会帮你去重复
public class DataComparator implements Comparator<JSONObject> {

@Override
public int compare(JSONObject o1, JSONObject o2) {
if(!((o1 instanceof JSONObject)&&(o2 instanceof JSONObject))){
throw new RuntimeException("Sorry");
}

int num =o2.getString("user_count").compareTo(o1.getString("user_count"));
if(num ==0)
return o2.getString("user_name").compareTo(o1.getString("user_name"));
return num;
}
}

//class2
import java.io.IOException;
import java.net.URLDecoder;
import java.util.Collections;
import java.util.Comparator;
import java.util.Set;
import java.util.TreeSet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import com.mongodb.BasicDBObject;

/**
* 列表
* @author k
* date:2016.1.23
*/
public class Test_management{

/**
*
*/
private static final long serialVersionUID = 305141227327561761L;
private static final Logger logger = Logger.getLogger(Test_management.class);

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
logger.info("查看");
request.setCharacterEncoding("UTF-8");

StringBuilder sb = new StringBuilder();
sb = getStringBuffer(jar);
}

/**
*
* @param JSONArray
* @return StringBuffer sb
*/
private JSONArray getStringBuffer(JSONArray jar){
StringBuilder sb = new StringBuilder();
JSONArray appendJar = new JSONArray();
Set<JSONObject> list=new TreeSet<>(new DataComparator());
//组装需要的数据
for(int i = 0 ; i<jar.size() ; i++){
JSONObject jsob = jar.getJSONObject(i);
JSONObject appendJsob = new JSONObject();
appendJsob.put("id",id);//id
appendJsob.put("user_name", user_name);//用户名
appendJsob.put("province", province));//省份
appendJsob.put("city", city);//城市
appendJsob.put("department_count",department_count );//部门
appendJsob.put("room_count",room_count );//房间数量
appendJsob.put("user_count",user_count );//用户数量
appendJar.add(appendJsob);

}

list.addAll(appendJar);//开始排序操作
appendJar = JSONArray.fromObject(list);转为json数组
return appendJar;
}

}

JSONArry排序 java

标签：

原文地址：http://www.cnblogs.com/xiaohaizhuimeng/p/5153484.html