【数据存储】JSON数据解析

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class MyJSONDemo extends Activity {
private TextView msg = null ;

@SuppressWarnings("unchecked")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main);
this.msg = (TextView) super.findViewById(R.id.msg) ;
String str = "{\"memberdata\":[{\"id\":1,\"name\
":\"李兴华\",\"age\":30},"+
"{\"id\":2,\"name\":\"MLDN\",\"age\":10}],
\"company\":\"北京魔乐科技软件学院\"}";
StringBuffer buf = new StringBuffer() ;
try {
// 解析文本
Map<String, Object> result = this.parseJson(str) ;                buf.append("公司名称：" + result.get("company") + "\n");
List<Map<String,Object>> all = (List<Map<String,Object>>)
result.get("memberdata") ;
Iterator<Map<String,Object>> iter = all.iterator() ;
while(iter.hasNext()){
Map<String,Object> map = iter.next() ;
buf.append("ID：" + map.get("id") +
"，姓名：" + map.get("name")
+ "，年龄：" + map.get("age") + "\n");
}
} catch (Exception e) {
e.printStackTrace();
}
this.msg.setText(buf) ;
}

private Map<String, Object> parseJson(String data)
throws Exception {
Map<String, Object> allMap = new HashMap<String, Object>();
// 全部的内容变为一个项
JSONObject allData = new JSONObject(data) ;
// 取出项
allMap.put("company", allData.getString("company"));
// 取出数组
JSONArray jsonArr = allData.getJSONArray("memberdata");         List<Map<String,Object>> all =
new ArrayList<Map<String,Object>>() ;
for (int x = 0; x < jsonArr.length(); x++) {
Map<String, Object> map = new HashMap<String, Object>();
JSONObject jsonObj = jsonArr.getJSONObject(x);
map.put("id", jsonObj.getInt("id"));
map.put("name", jsonObj.getString("name"));
map.put("age", jsonObj.getInt("age"));
all.add(map);
}
allMap.put("memberdata", all) ;
return allMap;
}
}