java json转map（复杂混合类型list、map和string）

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其中用到了instanceof，所需的jar包

看例子：

package json;import java.util.List;import java.util.Map;import net.sf.json.JSONObject;

public class JsonTest {public static void main(String[] args) {//list stringString jsonString = "{\"fans\":[{\"name\":\"小王\",\"age\":7},{\"name\":\"小尼玛\",\"age\":10}],\"name\":\"王尼玛\"}";Map map = JSONObject.fromObject(jsonString);if (map.get("fans") instanceof List) {for (Object object : (List)map.get("fans")) {System.out.println(object);}}if (map.get("name") instanceof String) {System.out.println(map.get("name"));}//map list IntegerString jsonString2 = "{\"data\": {\"pages\": [ {\"comment\": \"just for test\"},{\"comment\": \"just for test\"}],\"total_count\": 2 },\"errcode\": 0}";Map map2 = JSONObject.fromObject(jsonString2);if (map2.get("data") instanceof Map) {Map<String, Object> data = (Map<String, Object>) map2.get("data");System.out.println(data.get("total_count"));if (data.get("pages") instanceof List){for (Object object : (List)data.get("pages")) {System.out.println(object);}}}if (map2.get("errcode") instanceof Integer) {System.out.println(map2.get("errcode"));}}}

结果：

{"name":"小王","age":7}
{"name":"小尼玛","age":10}
王尼玛
2
{"comment":"just for test"}
{"comment":"just for test"}
0

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