//读取文件(字节流)InputStream in = new FileInputStream("d:\\1.txt");//写入相应的文件OutputStream out = new FileOutputStream("d:\\2.txt");//读取数据//一次性取多少字节byte[] bytes = new byte[2048];//接受读取的内容(n就代表的相关数据，只不过是数字的形式)int n = -1;//循环取出数据while ((n = in.read(bytes,0,bytes.length)) != -1) {//转换成字符串String str = new String(bytes,0,n,"GBK"); #这里可以实现字节到字符串的转换，比较实用System.out.println(str);//写入相关文件out.write(bytes, 0, n);}//关闭流
        in.close();out.close();

 //读取文件(缓存字节流)BufferedInputStream in = new BufferedInputStream(new FileInputStream("d:\\1.txt"));//写入相应的文件BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream("d:\\2.txt"));//读取数据//一次性取多少字节byte[] bytes = new byte[2048];//接受读取的内容(n就代表的相关数据，只不过是数字的形式)int n = -1;//循环取出数据while ((n = in.read(bytes,0,bytes.length)) != -1) {//转换成字符串String str = new String(bytes,0,n,"GBK");System.out.println(str);//写入相关文件out.write(bytes, 0, n);}//清楚缓存
        out.flush();//关闭流
        in.close();out.close();

 //读取文件(字节流)InputStreamReader in = new InputStreamReader(new FileInputStream("d:\\1.txt"),"GBK");//写入相应的文件OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream("d:\\2.txt"));//读取数据//循环取出数据byte[] bytes = new byte[1024];int len = -1;while ((len = in.read()) != -1) {System.out.println(len);//写入相关文件
            out.write(len);}//清楚缓存
        out.flush();//关闭流
        in.close();out.close();

//读取文件(字符流)BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream("d:\\1.txt"),"GBK"));#这里主要是涉及中文//BufferedReader in = new BufferedReader(new FileReader("d:\\1.txt")));//写入相应的文件BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("d:\\2.txt"),"GBK"));//BufferedWriter out = new BufferedWriter(new FileWriter("d:\\2.txt"))；//读取数据//循环取出数据String str = null;while ((str = in.readLine()) != null) {System.out.println(str);//写入相关文件
            out.write(str);out.newLine();}//清楚缓存
        out.flush();//关闭流
        in.close();out.close();

//读取文件(字节流)Reader in = new InputStreamReader(new FileInputStream("d:\\1.txt"),"GBK");//写入相应的文件PrintWriter out = new PrintWriter(new FileWriter("d:\\2.txt"));//读取数据//循环取出数据byte[] bytes = new byte[1024];int len = -1;while ((len = in.read()) != -1) {System.out.println(len);//写入相关文件
            out.write(len);}//清楚缓存
        out.flush();//关闭流
        in.close();out.close();