附加到文件

import java.io.BufferedWriter;
/* 
 来自 
*时 代 J     a    v  a - nowjava.com*/

import java.io.FileWriter;

import java.io.IOException;


public class Main {


  public void m() {

    try {

      BufferedWriter out = new BufferedWriter(new FileWriter("filename", true));

      out.write("aString");

      out.close();

    } catch (IOException e) {

    }

  }

}
/** 
来 自 
时代Java
**/