【PrintWriter】略胜一筹，其实PrintWriter也相当一个转换流

import java.io.*;
class Test
{
public static void main(String[] args) throws IOException
{
PrintWriter pw=new PrintWriter(new FileWriter(new File("c:\\jingtianxiaozhi.txt")),true);
pw.println("asdfasf");
pw.println("asdfasf");
pw.println("asdfasf");
pw.close();
}
}