java向文件中追加数据_Java 实例 – 向文件中追加数据

Java 实例 - 向文件中追加数据

以下实例演示了使用 filewriter 方法向文件中追加数据：

/*

author by w3cschool.cc

Main.java

*/

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\n");

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);

}

}

}

以上代码运行输出结果为：

aString1

aString2