u014580558的专栏

利用Gson快速解析json

需要导入Gson包，，解析成一个对象或一个包含此对象的list

JsonHelper代码如下：import java.util.ArrayList;import java.util.List;import android.text.TextUtils;import com.google.gson.Gson;import com.google.gson.JsonParseException;import com.google.gson.JsonParser;import com.google.gson.reflect.TypeToken;{private static JsonHelper util;public static JsonHelper getInstance() {if (util == null) {util = new JsonHelper();}return util;}private JsonHelper() {super();}public String createJsonString(Object value) {Gson gson = new Gson();String str = gson.toJson(value);return str;}public <T> T getObject(String jsonString, Class<T> cls) {T t = null;try {if (isGoodJson(jsonString)) {Gson gson = new Gson();t = gson.fromJson(jsonString, cls);}} catch (Exception e) {e.printStackTrace();}return t;}public <T> List<T> getList(String jsonString, TypeToken<T> tt) {List<T> list = new ArrayList<T>();try {if (isGoodJson(jsonString)) {Gson gson = new Gson();list = gson.fromJson(jsonString, tt.getType());}} catch (Exception e) {}return list;}(String json) {return !isGoodJson(json);}(String json) {if (TextUtils.isEmpty(json)) {return false;}try {new JsonParser().parse(json);} catch (JsonParseException e) {return false;}return true;}}使用方法Bean bean = new Bean();bean.age=”30″;bean.name=”name”;String result = JsonHelper.getInstance().createJsonString(bean);System.out.println(result);Bean bean2 = JsonHelper.getInstance().getObject(result, Bean.class);System.out.println(bean2.toString());ArrayList<Bean> list = new ArrayList<Bean>();list.add(bean);list.add(bean2);result = JsonHelper.getInstance().createJsonString(list);System.out.println(result);List<ArrayList<Bean>> list2 = JsonHelper.getInstance().getList(result, new TypeToken<ArrayList<Bean>>(){});System.out.println(list2.toString());

Bean.java

public class Bean {String name=””;String age=””;@Overridepublic String toString() {return “Bean [name=” + name + “, age=” + age + “]”;}}

打印结果：

03-10 13:47:09.291: I/System.out(22869): {“age”:”30″,”name”:”name”}03-10 13:47:09.291: I/System.out(22869): Bean [name=name, age=30]03-10 13:47:09.301: I/System.out(22869): [{“age”:”30″,”name”:”name”},{“age”:”30″,”name”:”name”}]03-10 13:47:09.301: I/System.out(22869): [Bean [name=name, age=30], Bean [name=name, age=30]]

最好的感觉就是你什么都跟我说。