Reprinted: java array to get the value json format

Transfer: https://www.cnblogs.com/kkxwze/p/11134846.html

 

the first method:

String str = "{ 'array' : [{ 'id': 5, 'name': ' John Doe'}, { 'id': 6, 'name': ' John Doe'}]}"; 
 the JSONArray JSONArray = null; 
 JSONArray = jsonobj.getJSONArray ( "array"); // get the array 
 System.out.println (jsonArray.getJSONObject (0) .get ( "name"));

String str = "[{'columnId':5,'columnName':'人文历史'},{'columnId':2,'columnName':'商业视野'}]}";
JSONArray jsonArray = null;
jsonArray = new JSONArray(str);
System.out.println(jsonArray.getJSONObject(0).get("columnName"));

Two, JAVA get all the key-value pairs in the json

 JSONObject json1=JSONObject.fromObject("{'username' : '11111','clientid' : '','password' : '222222'}");  
Map<String, Object> map =json1;  
for (Entry<String, Object> entry : map.entrySet()) {  
     System.out.println(entry.getKey()+"="+entry.getValue());  
 }     

All the values ​​of an array of three extraction json

public class JsonExtracter {public static void main (String [] args) {String s = "{\" name \ ": \" a \ ", \" family \ ": [\" John Doe \ ", \" John Doe \ "]}"; 

        the jSONObject jsonObject = JSON.parseObject (S); 

        // Note: the contents of the family with brackets [], the object to be transformed JSONArray type 
        JSONArray family = jsonObject.getJSONArray ( "family" ) ; 

        for (int I = 0; I <family.size (); I ++) {// extract all family of 
            String S1 = (String) family.get (I); 
            System.out.println ( "currentFamily:" S1 +); 

        }}

the first method:

String str = "{ 'array' : [{ 'id': 5, 'name': ' John Doe'}, { 'id': 6, 'name': ' John Doe'}]}"; 
 the JSONArray JSONArray = null; 
 JSONArray = jsonobj.getJSONArray ( "array"); // get the array 
 System.out.println (jsonArray.getJSONObject (0) .get ( "name"));

String str = "[{'columnId':5,'columnName':'人文历史'},{'columnId':2,'columnName':'商业视野'}]}";
JSONArray jsonArray = null;
jsonArray = new JSONArray(str);
System.out.println(jsonArray.getJSONObject(0).get("columnName"));

Two, JAVA get all the key-value pairs in the json

 JSONObject json1=JSONObject.fromObject("{'username' : '11111','clientid' : '','password' : '222222'}");  
Map<String, Object> map =json1;  
for (Entry<String, Object> entry : map.entrySet()) {  
     System.out.println(entry.getKey()+"="+entry.getValue());  
 }     

All the values ​​of an array of three extraction json

public class JsonExtracter {public static void main (String [] args) {String s = "{\" name \ ": \" a \ ", \" family \ ": [\" John Doe \ ", \" John Doe \ "]}"; 

        the jSONObject jsonObject = JSON.parseObject (S); 

        // Note: the contents of the family with brackets [], the object to be transformed JSONArray type 
        JSONArray family = jsonObject.getJSONArray ( "family" ) ; 

        for (int I = 0; I <family.size (); I ++) {// extract all family of 
            String S1 = (String) family.get (I); 
            System.out.println ( "currentFamily:" S1 +); 

        }}