[JAVA] xml 讀取轉碼寫入 未完成

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class XML_Read {
public static void main(String[] args) {
// 讀取檔案
try {
// FileReader fr = new FileReader("try.xml");
FileInputStream fr = new FileInputStream("try.xml");
InputStreamReader isr = new InputStreamReader(fr, "BIG5");
BufferedReader br = new BufferedReader(isr);
String str = new String();
while (br.ready()) {
System.out.println(br.readLine());
String brStr = br.readLine();
str = str + brStr;
}
// 寫入檔案
// FileOutputStream fos = new FileOutputStream("try_test.xml");
// OutputStreamWriter osw = new OutputStreamWriter(fos);
BufferedWriter bw = new BufferedWriter(new FileWriter("try_test.xml"));
} catch (Exception e) {
e.printStackTrace();
} finally {
}
}
}