json学习笔记（圣思园视频学习笔记）

1.需要把json的包源码搞出来，我们就可以测试了。（下载地址）https://github.com/douglascrockford/JSON-java

2，测试代码如下：

package shengsiyuan.lxd.json;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.junit.Test;

public class TestJson
{
    @Test
    public void TestJson01() throws JSONException
    {
        String jsonContent = "{'name':'lixiaodaoaaa','age':26}";
        JSONObject myJson = new JSONObject(jsonContent);
        String strName = myJson.getString("name").toString();
        String strAge =String.valueOf(myJson.getInt("age"));
        System.out.println(strName);
        System.out.println(strAge);
    }
    @Test
    public void TestJson02() throws JSONException
    {
        String jsonContent ="[{'name':'lixiaodaoaaa','age':22}," +
                "{'name':'lihao','age':26}," +
                "{'name':'libo','age':27}]";
        JSONArray myJsonArray = new JSONArray(jsonContent);
        String strName1  = myJsonArray.getJSONObject(0).getString("name");
        String strName2  = myJsonArray.getJSONObject(1).getString("name");
        String strName3  = myJsonArray.getJSONObject(2).getString("name");
        String strAge1 = String.valueOf(myJsonArray.getJSONObject(0).getInt("age"));
        String strAge2 = String.valueOf(myJsonArray.getJSONObject(1).getInt("age"));
        String strAge3 = String.valueOf(myJsonArray.getJSONObject(2).getInt("age"));
        System.out.println(strName1+"................************............."+strAge1);
        System.out.println(strName2+"................************............."+strAge2);
        System.out.println(strName3+"................************............."+strAge3);
    }
    @Test
    public void TestJson03() throws JSONException
    {
        String jsonString = "[{'key':{'name':'lixiaodaoaaa','age':22}}, {'key':{'name':'lihao','age':21}},{'key':{'name':'libo','age':23}}]";
        JSONArray myjsonArray = new JSONArray(jsonString);
        for(int i=0;i<myjsonArray.length();i++)
        {
            String strName = myjsonArray.getJSONObject(i).getJSONObject("key").get("name").toString();
            String strAge = String.valueOf(myjsonArray.getJSONObject(i).getJSONObject("key").getInt("age"));
            System.out.println(strName+"************************"+strAge);
        }
    }
}