Java IO流的转换流

public static void main(String[] args) throws IOException {String dir = "e:/test/Java";String fileName = "java.txt";//创建一个文件File f = new File(dir,fileName);NewDir(dir); //检查目录是否存在NewFile(dir+"/"+fileName); //创建文件名//输出字符流OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(f,true));BufferedWriter bw = new BufferedWriter(osw);for(int i=1; i<=100; i++){bw.write("中国java程序员");bw.newLine();}bw.close();osw.close();//输入字符流InputStreamReader isr = new InputStreamReader(new FileInputStream(f));BufferedReader br = new BufferedReader(isr);String s;while((s=br.readLine())!=null){System.out.println(s.toUpperCase());}br.close();isr.close();}//创建目录public static void NewDir(String dir){File f = new File(dir);if(!f.exists()){f.mkdirs();}}//由http://www.secn.com.cn 提供，转载请注明来源，谢谢！public static void NewFile(String file) throws IOException{File f = new File(file);String parent = f.getParent();NewDir(parent);if(!f.exists()){f.createNewFile();}}

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