java 文件续写

public class filewriterdemo {
    public static void main(string[] args) {
        filewriter fw = null;
        try {
            // 传递true，代表不覆盖已有文件，追加
            fw = new filewriter("demo.txt", true);
            fw.write("abcde\n");
        } catch (ioexception e) {
            system.out.println(e.tostring());
        } finally {
            try {
                if (fw != null)
                    fw.close();
            } catch (ioexception e) {
                e.printstacktrace();
            }
        }
    }
}