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;    public class JsonHelper {      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;      }        public boolean isBadJson(String json) {          return !isGoodJson(json);      }        public boolean isGoodJson(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="";      @Override      public String toString() {          return "Bean [name=" + name + ", age=" + age + "]";      }        }