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