[Java]读写文件方法大全

1、按字节读取文件内容

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public class ReadFromFile { readFileByBytes(String fileName) {File file = new File(fileName);InputStream in = null;try {System.out.println(“以字节为单位读取文件内容，一次读一个字节：”);// 一次读一个字节in = new FileInputStream(file);int tempbyte;while ((tempbyte = in.read()) != -1) {System.out.write(tempbyte);}in.close();} catch (IOException e) {e.printStackTrace();return;}try {System.out.println(“以字节为单位读取文件内容，美国空间，香港虚拟主机，一次读多个字节：”);[] tempbytes = new byte[100];int byteread = 0;in = new FileInputStream(fileName);ReadFromFile.showAvailableBytes(in);((byteread = in.read(tempbytes)) != -1) {System.out.write(tempbytes, 0, byteread);}} catch (Exception e1) {e1.printStackTrace();} finally {if (in != null) {try {in.close();} catch (IOException e1) {}}}}，香港虚拟主机没有伞的孩子必须努力奔跑！