想咨询一下关于FileOutputStream的问题，麻烦大佬帮忙看看~

Question

代码如下：
Properties props = new Properties();
InputStream is = getClass().getResourceAsStream("test.properties");
try{
props.load(is);
is.close();
System.out.println(props.getProperty("test"));
props.setProperty("test", "reset");
FileOutputStream fos = new FileOutputStream("test2",true);
props.store(fos, null);
fos.write("httpL//juncsu.blogcn.com".getBytes());
fos.close();
}catch(Exception ex){
ex.printStackTrace();
}

结果是属性文件的内容可以读出来，但是无法写进去，测试中FileOutputStream直接写入也没有反应。不知道什么情况会导致这样的问题？或者有其他写Properties的方法？

Answer 1

/*** 读出1.txt中的内容，写入2.txt中**/import java.io.*;public class readwritefile{public static void main(string[] args){try{file read = new file("c:\\1.txt");file write = new file("c:\\2.txt");bufferedreader br = new bufferedreader(new filereader(read));bufferedwriter bw = new bufferedwriter(new filewriter(write));string temp = null;temp = br.readline();while(temp != null){//写文件bw.write(temp + "\r\n"); //只适用windows系统//继续读文件temp = br.readline();}bw.close();br.close();}catch(filenotfoundexception e){ //文件未找到system.out.println (e);}catch(ioexception e){system.out.println (e);}}} 

Answer 2

FileOutputStream fos = new FileOutputStream("test2",true);test2文件没有扩展名