如何追加一個字符串到現有文件？

解決方法

此示例演示如何使用文件字符寫的方法追加一個字符串到現有文件。

import java.io.*;

public class Main {
   public static void main(String[] args) throws Exception {
      try {
         BufferedWriter out = new BufferedWriter
         (new FileWriter("filename"));
         out.write("aString1
");
         out.close();
         out = new BufferedWriter(new FileWriter
         ("filename",true));
         out.write("aString2");
         out.close();
         BufferedReader in = new BufferedReader
         (new FileReader("filename"));
         String str;
         while ((str = in.readLine()) != null) {
            System.out.println(str);
         }
      }
      in.close();
      catch (IOException e) {
         System.out.println("exception occoured"+ e);
      }
   }
}

結果

上麵的代碼示例將產生以下結果。

aString1
aString2