Java 向文件中追加数据

java向文件中追加数据内容。

使用filewrite()方法向文件中追加数据

完整代码

import java.io.*;
 
public class Main {
    public static void main(String[] args) throws Exception {
        try {
            BufferedWriter out = new BufferedWriter(new FileWriter("filename"));
            out.write("firstString\n");
            out.close();
            out = new BufferedWriter(new FileWriter("filename",true));
            out.write("secondString");
            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);
        }
    }
}

结果输出

firstString
secondString