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  • json字符串转成 Map/List

    package jsonToMap;
    
    import java.util.List;
    import java.util.Map;
    import java.util.Map.Entry;
    
    import net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    
    
    
    /**
     * 说明 json字符串 转成 Map/List
     * @author xss
     * @date 2013-1-18 10:22:41
     * @mail wuniu2010@126.com
     */
    public class JsonToMap {
    
    	public static void main(String[] args) {
    		
    		//JSONArray
    		String jsonArrayData="[{"a1":"12","b1":"112","c1":"132","d1":"134"},{"a2":"12","b2":"112","c2":"132","d2":"134"},{"a3":"12","b3":"112","c3":"132","d3":"134"}]";
    		JSONArray jsonArray = JSONArray.fromObject(jsonArrayData);
    
    		List<Map<String,Object>> mapListJson = (List)jsonArray;
    		for (int i = 0; i < mapListJson.size(); i++) {
    			Map<String,Object> obj=mapListJson.get(i);
    			
    			for(Entry<String,Object> entry : obj.entrySet()){
    	            String strkey1 = entry.getKey();
    	            Object strval1 = entry.getValue();
    	            System.out.println("KEY:"+strkey1+"  -->  Value:"+strval1+"
    ");
    	        }
    		}
    		
    		
    		
    		// JSONObject 
    		String jsonObjectData="{"data1":{"a1":"12","b1":"112","c1":"132","d1":"134"},"data2":{"a2":"12","b2":"112","c2":"132","d2":"134"},"data3":{"a3":"12","b3":"112","c3":"132","d3":"134"}}";
    		JSONObject jsonObject = JSONObject.fromObject(jsonObjectData);
    		
    		Map<String, Object> mapJson = JSONObject.fromObject(jsonObject);
    		
            for(Entry<String,Object> entry : mapJson.entrySet()){
                Object strval1 = entry.getValue();
                JSONObject jsonObjectStrval1 = JSONObject.fromObject(strval1);
                Map<String, Object> mapJsonObjectStrval1 = JSONObject.fromObject(jsonObjectStrval1);
                System.out.println("KEY:"+entry.getKey()+"  -->  Value:"+entry.getValue()+"
    ");
                for(Entry<String, Object> entry1:mapJsonObjectStrval1.entrySet()){
                	System.out.println("KEY:"+entry1.getKey()+"  -->  Value:"+entry1.getValue()+"
    ");
                }
                
            }
    	}
    
    }
    
    import java.util.Iterator;
    import java.util.Set;
    
    import org.json.JSONArray;
    import org.json.JSONException;
    import org.json.JSONObject;
    /**
     * @date 2013-2-1 10:36:22
     * @author xss
     * @说明 org.json jar包环境下 遍历 不知道外层key的json字符串
     */
    public class JsonTest {
    
    	public static void main(String[] args) {
    		try {
    			String json = "{"1293142@1098820@1211867_1083940_1293396_1148650":[{"FS_ID":"1293396","SX_MC":"李四","YFS_ID":"1293142","SZ_ID":"1148650","SX_Z":"803932"}],"1293142@1098820@1211867_1083940_1293396_1097084":[{"FS_ID":"1293396","SX_MC":"李四","YFS_ID":"1293142@1084106@1103027","SZ_ID":"1097084","SX_Z":"124"}],"1293142@1098820@1211867_1083940_1293331_1148650":[{"FS_ID":"1293331","SX_MC":"张三","YFS_ID":"1293142","SZ_ID":"1148650","SX_Z":"1005240"}],"1293142@1098820@1211867_1083940_1293331_1097084":[{"FS_ID":"1293331","SX_MC":"张三","YFS_ID":"1293142@1084106@1103027","SZ_ID":"1097084","SX_Z":"204"}],"1293142@1098820@1211867_1083940_1284806_1148650":[{"FS_ID":"1284806","SX_MC":"王小二","YFS_ID":"1293142","SZ_ID":"1148650","SX_Z":"513475"}],"1293142@1098820@1211867_1083940_1284806_1097084":[{"FS_ID":"1284806","SX_MC":"王小二","YFS_ID":"1293142@1084106@1103027","SZ_ID":"1097084","SX_Z":"145"}],"1293142@1098820@1211867_1083940_1293461_1148650":[{"FS_ID":"1293461","SX_MC":"朱重八","YFS_ID":"1293142","SZ_ID":"1148650","SX_Z":"339040"}],"1293142@1098820@1211867_1083940_1293461_1097084":[{"FS_ID":"1293461","SX_MC":"朱重八","YFS_ID":"1293142@1084106@1103027","SZ_ID":"1097084","SX_Z":"52"}]}";
    			JSONObject jsonObj = new JSONObject(json);
    
    			//方式二
    			Iterator it = jsonObj.keys();
    			for (int j = 0; it.hasNext(); j++) {
    				String str = it.next().toString();
    				System.out.println(str);
    
    				JSONArray array = new JSONArray(jsonObj.get(str).toString());
    				System.out.println(array);
    				for (int i = 0; i < array.length(); i++) {
    					JSONObject jons = array.getJSONObject(i);
    					System.out.println(jons.get("SX_MC"));
    				}
    			}
    			System.out.println("tep2");
    			
    			//方式1
    			Set<String> set = jsonObj.keySet();
    			for (String str : set) {
    				System.out.println(str);
    				JSONArray array = new JSONArray(jsonObj.get(str).toString());
    				System.out.println(array);
    				for (int i = 0; i < array.length(); i++) {
    					JSONObject jons = array.getJSONObject(i);
    					System.out.println(jons.get("SX_MC"));
    				}
    			}
    
    		} catch (JSONException e) {
    			e.printStackTrace();
    		}
    	}
    }
    
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  • 原文地址:https://www.cnblogs.com/interdrp/p/5793100.html
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