json.org.jar和gson-2.2.4.jar(含解析和生成demo)

package json; import java.util.HashMap; import java.util.List; import java.util.Map; import org.json.JSONException; import org.json.JSONObject; import com.google.gson.Gson; public class Test { public static void main(String[] args) throws Exception { //json jar //解析 String a = "{\"aa\": \"11\",\"bb\": \"22\"}"; System.out.println(a); JSONObject josn = new JSONObject(a); String res = josn.getString("aa"); System.out.println(res); //end //gson jar /*{ "aa": "33", "bb": "44", "list": [ { "name": "张三", "gender": "男" }, { "name": "李四", "gender": "女" } ] }*/ //解析 String jsonString = "{\"aa\": \"33\",\"bb\": \"44\",\"list\": [{\"name\": \"张三\",\"gender\": \"男\"},{\"name\": \"李四\",\"gender\": \"女\"}]}"; System.out.println(jsonString); Gson gson = new Gson(); bean zxc = gson.fromJson(jsonString, bean.class); String aa = zxc.getAa(); String bb = zxc.getBb(); System.out.println(aa);//输出aa System.out.println(bb);//输出bb List<stu> list = zxc.getList(); for (stu stu : list) { String name = stu.getName(); String gender = stu.getGender(); System.out.println(name);//输出name System.out.println(gender);//输出gender } //生成同理 //gson.toJson() 方法 //json 生成 JSONObject jsonzxc = new JSONObject(); Map<String, String> map = new HashMap<String, String>(); map.put("xx", "11"); map.put("zz", "22"); jsonzxc.put("key", map); String xxx = jsonzxc.getString("key"); System.out.println(xxx); } }