jsonarray按指定字段进行排序

刺骨的言语ヽ痛彻心扉 2022-09-02 15:52 51阅读 0赞

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"));
    		
    		
    		
    		
    		
    	}
    }