java json 怎么去除 java数据简单json清洗代码

package json;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONArray;
public class JsonConvert {
/**
* @param args
*/
public static void main(String[] args) {
// 读取nameID.txt文件中的NAMEID字段(key)对应值(value)并存储
ArrayList list = new ArrayList();
BufferedReader brname;
try {
brname = new BufferedReader(new FileReader("src/json/nameID.txt"));// 读取NAMEID对应值
String sname = null;
while ((sname = brname.readLine()) != null) {
// System.out.println(sname);
list.add(sname);// 将对应value添加到链表存储
}
brname.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// 读取原始json文件并进行操作和输出
try {
BufferedReader br = new BufferedReader(new FileReader(
"src/json/HK_geo.json"));// 读取原始json文件
BufferedWriter bw = new BufferedWriter(new FileWriter(
"src/json/HK_new.json"));// 输出新的json文件
String s = null, ws = null;
while ((s = br.readLine()) != null) {
// System.out.println(s);
try {
JSONObject dataJson = new JSONObject(s);// 创建一个包含原始json串的json对象
JSONArray features = dataJson.getJSONArray("features");// 找到features的json数组
for (int i = 0; i 
JSONObject info = features.getJSONObject(i);// 获取features数组的第i个json对象
JSONObject properties = info.getJSONObject("properties");// 找到properties的json对象
String name = properties.getString("name");// 读取properties对象里的name字段值
System.out.println(name);
properties.put("NAMEID", list.get(i));// 添加NAMEID字段
// properties.append("name", list.get(i));
System.out.println(properties.getString("NAMEID"));
properties.remove("ISO");// 删除ISO字段
}
ws = dataJson.toString();
System.out.println(ws);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
bw.write(ws);
// bw.newLine();
bw.flush();
br.close();
bw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}