Java写入txt文件内容

Java写入数据进txt文件，需求：多条数据追加进文件，且需要处理中文编码问题。

以下代码只能处理向文件添加数据的功能，但是会覆盖掉之前的数据

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class Write {
    public static void main(String[] args) throws IOException {
        String word = "hahahahhahahahhah";
        FileOutputStream fileOutputStream = null;
        File file = new File("F:\\test\\test.txt");
        if(!file.exists()){
            file.createNewFile();
        }
        fileOutputStream = new FileOutputStream(file);
        fileOutputStream.write(word.getBytes("gbk"));
        fileOutputStream.flush();
        fileOutputStream.close();

    }
}

正确实例

public class Test{
    public static void main(String[] args) throws IOException {
        String path = "F:\\test\\test.txt";
        String word = "试试";
        BufferedWriter out = new BufferedWriter(
                new OutputStreamWriter(new FileOutputStream(path,true)));
        out.write(word+"\r\n");
        out.close();
    }
}