关于FileIO的基础有关问题,_J2SE

关于FileIO的基础问题,请指教。
我是一个JAVA初学者，在学到IO这章时碰到个疑惑，请大家指教。

我想实现一个从控制台输入字符串，把字符串的内容写到文本文件里，功能基本实现，但每次输入文字（或字符串）按2次ENTER键的时候，程序就会报错。我想不停的从控制台输入，把输入的内容写到文本文件里，请问怎么实现，谢谢。代码和异常如下：

////代码////
public class ColligationIO {
public static void main(String args[]) throws IOException {
OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(
"d:\\test\\test1.txt"));
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
String read = br.readLine();
osw.write(read);
while (read != null) {
if (read.trim().length() > 0) {
if (read.equalsIgnoreCase("exit"))
return;
read = br.readLine();
osw.write(read);

osw.close();
} else {
return;
}
}
}
}
///////异常///////
Exception in thread "main" java.io.IOException: Stream closed
at sun.nio.cs.StreamEncoder.ensureOpen(Unknown Source)
at sun.nio.cs.StreamEncoder.write(Unknown Source)
at sun.nio.cs.StreamEncoder.write(Unknown Source)
at java.io.OutputStreamWriter.write(Unknown Source)
at java.io.Writer.write(Unknown Source)
at ColligationTest.ColligationIO.main(ColligationIO.java:19)

------解决方案--------------------------------------------------------
while (read != null) { //如果不为空进循环
if (read.trim().length() > 0) {
if (read.equalsIgnoreCase("exit"))
return;
read = br.readLine();
osw.write(read);

osw.close(); //这个关闭流在循环里面．．
} else {
return;
}
}
}

如果你按回车也就是为空吧！它不会进循环．．

不进循环就不会关闭流．．就报Exception in thread "main" java.io.IOException: Stream closed

把osw.close();写到循环外面试试看．．我也是新手，只是这样认为的．．呵呵．
------解决方案--------------------------------------------------------

引用楼主 standsky 的帖子:
我是一个JAVA初学者，在学到IO这章时碰到个疑惑，请大家指教。

我想实现一个从控制台输入字符串，把字符串的内容写到文本文件里，功能基本实现，但每次输入文字（或字符串）按2次ENTER键的时候，程序就会报错。我想不停的从控制台输入，把输入的内容写到文本文件里，请问怎么实现，谢谢。代码和异常如下：

////代码////
public class ColligationIO {
public static void main(String args[]) throws IOException { …

------解决方案--------------------------------------------------------
要注意 flush 问题

Java code

import java.io.*;////代码//// public class ColligationIO {   public static void main(String args[]) throws Exception {    OutputStreamWriter osw = new OutputStreamWriter(           new FileOutputStream(    "d:\\test\\test1.txt"));    InputStreamReader isr = new InputStreamReader(System.in);    BufferedReader br = new BufferedReader(isr);    String read = null;     while ( (read=br.readLine()) != null) {    if (read.trim().length() > 0) {    if (read.equalsIgnoreCase("exit"))    {     osw.close();      return;     }   osw.write(read);   osw.flush();}//if }//while }//main } //class
------解决方案--------------------------------------------------------
Java codepackage csdn;import java.io.BufferedReader;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;public class ColligationIO {     public static void main(String args[]) throws IOException {         OutputStreamWriter osw =null;        BufferedReader br = null;        try {            osw = new OutputStreamWriter(new FileOutputStream(             "e:\\test\\test1.txt"));             InputStreamReader isr = new InputStreamReader(System.in);             br = new BufferedReader(isr);             String read =null;            while (true) {                 read = br.readLine();                 if (read.trim().length() > 0) {                     if (read.equalsIgnoreCase("exit"))                         break;                     osw.write(read+"\r\n");                         osw.flush();                 }            }         }finally {            if(br!=null)            br.close();            if(osw!=null)            osw.close();        }    } }