jsonクラスライブラリによるjsonフォーマットデータの自動生成小テスト

[size=small]

import java.util.ArrayList;
import java.util.List;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;

import cn.itcast.bean.Province;

public class TestJson {

	public static void main(String[] args) {
		
		List<Province> list = new ArrayList<Province>();
		Province p1 = new Province(1,"   ");
		Province p2 = new Province(2,"   ");
		Province p3 = new Province(3,"   ");
		list.add(p1);
		list.add(p2);
		list.add(p3);
		
		JSONArray jsArray = JSONArray.fromObject(list);
		System.out.println(jsArray.toString());
System.out.println("-------------------");

		JsonConfig config = new JsonConfig();
		//   list        Province     pid       json
		config.setExcludes(new String[]{"pid"});
		jsArray = JSONArray.fromObject(list, config);
		System.out.println(jsArray);
System.out.println("-------------------");	

		Province p = new Province(1, "   ");
		jsArray = JSONArray.fromObject(p);
		//       json  
		JSONObject jsObject = JSONObject.fromObject(p);
		System.out.println(jsArray);
		System.out.println(jsObject);
System.out.println("-------------------");	
		
		JsonConfig config1 = new JsonConfig();
		config1.setExcludes(new String[]{"pid"});
		jsObject = JSONObject.fromObject(p, config1);
		System.out.println(jsObject);
	}

}

印刷結果:
[{「pid」:1,「pname」:「吉林省」},{「pid」:2,「pname」:「遼寧省」},{「pid」:3,「pname」:「山東省」}]
-------------------
[{"pname":"吉林省"},{"pname":"遼寧省"},{"pname":"山東省"}]
-------------------
[{"pid":1,"pname":"吉林省"}]
{「pid」:1,「pname」:「吉林省」}
-------------------
{「pname」:「吉林省」}[/size]