jsonarray按指定字段进行排序

Posted 2021-08-31 xiejunna

package com.demo.util;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

public class Utils {

	private static final Logger logger = LoggerFactory.getLogger(Utils.class);
	

	/**
	 *	 按照JSONArray中的对象的某个字段进行排序(采用fastJson)
	 * 
	 * @param jsonArrayStr json数组字符串
	 * @param sortkeyname 根据哪个字段进行排序
	 * @param order 倒序：0；非0顺序
	 * @return 排序后的jsonarray
	 */
	public static String jsonArraySortByField(String jsonArrayStr,String sortkeyname, String order) {
		
		JSONArray sortedJsonArray = new JSONArray();
		
		try {
			
			JSONArray jsonArray = JSON.parseArray(jsonArrayStr);
			
			List<JSONObject> jsonList = new ArrayList<JSONObject>();

			for (int i = 0; i < jsonArray.size(); i++) {
				jsonList.add(jsonArray.getJSONObject(i));
			}

			Collections.sort(jsonList, new Comparator<JSONObject>() {

				@Override
				public int compare(JSONObject a, JSONObject b) {

					String strA = new String();
					String strB = new String();

					String regEx="[\\n`~!@#$%^&*()+=|{}':;',\\\\-_\\\\[\\\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。， 、？]";
					
					String aStr = a.getString(sortkeyname);
					strA = aStr.replaceAll(regEx, "");
					String bStr = b.getString(sortkeyname);
					strB = bStr.replaceAll(regEx, "");

					if ("0".equals(order)) {
						return -strA.compareTo(strB);
					}else {
						return strA.compareTo(strB);
					}

				}
			});

			for (int i = 0; i < jsonArray.size(); i++) {
				sortedJsonArray.add(jsonList.get(i));
			}

			
		} catch (Exception e) {
			logger.error("{}",e);
		}
		
		
		return sortedJsonArray.toString();
	}

	public static void main(String[] args) {
		String arystr = "[{\\"score\\":\\"0.9627372622\\",\\"id\\":\\"103a16\\",\\"pic\\":\\"https://www.baidu.com/image/8.jpg\\",\\"token\\":\\"103a16\\"},{\\"score\\":\\"0.9312456846\\",\\"id\\":\\"88ca26\\",\\"pic\\":\\"https://www.baidu.com/image/7.jpg\\",\\"token\\":\\"88ca26\\"},{\\"score\\":\\"0.864590168\\",\\"id\\":\\"62f9af\\",\\"pic\\":\\"https://www.baidu.com/image/6.jpg\\",\\"token\\":\\"62f9af\\"},{\\"score\\":\\"0.4668337405\\",\\"id\\":\\"133c95\\",\\"pic\\":\\"https://www.baidu.com/image/5.jpg\\",\\"token\\":\\"133c95\\"},{\\"score\\":\\"0.3707543612\\",\\"token\\":\\"14f4f5\\",\\"id\\":\\"14f4f5\\",\\"pic\\":\\"https://www.baidu.com/image/4.jpg\\"},{\\"score\\":\\"0.3620336354\\",\\"id\\":\\"f93484\\",\\"pic\\":\\"https://www.baidu.com/image/3.jpg\\",\\"token\\":\\"f93484\\"},{\\"score\\":\\"0.3187969029\\",\\"id\\":\\"cf77f1\\",\\"pic\\":\\"https://www.baidu.com/image/2.jpg\\",\\"token\\":\\"cf77f1\\"},{\\"score\\":\\"0.1458527148\\",\\"id\\":\\"1dff6f\\",\\"pic\\":\\"https://www.baidu.com/image/1.jpg\\",\\"token\\":\\"1dff6f\\"}]";
		System.out.println(jsonArraySortByField(arystr, "score","0"));
		
		
		
		
		
	}
}