java 字节流字符流读写

来源：互联网发布：2016年双11淘宝交易额编辑：程序博客网时间：2024/05/17 02:01

字节流和字符流的区别：

字节流就是可以读取图片，文本，视频等二进制数据；字符流只能读取纯文本文件。

字节流读写示例：

public static void main(String[] args) {String path = "D:/study_project/1.jpg";String path1 = "D:/study_project/2.jpg";String path2 = "D:/study_project/java-io-test.txt";String path3 = "D:/study_project/java-io-test-to.txt";//readTxt(path2);writeFile(path2,path3);}/** * 文件的写入： * @param fromPath 源 * @param toPath   目标 */public static void writeFile(String fromPath,String toPath) {BufferedInputStream fis = null;BufferedOutputStream fos = null;int len = 2;byte[] buffer = new byte[len];try {fis = new BufferedInputStream(new FileInputStream(fromPath));fos = new BufferedOutputStream(new FileOutputStream(toPath));while ((fis.read(buffer, 0, len)!=-1) && buffer.length > 0) {fos.write(buffer, 0, buffer.length);}} catch (FileNotFoundException e) {e.printStackTrace();System.out.println("文件没有找到");} catch (IOException e) {e.printStackTrace();System.out.println("文件读取异常");} finally {try {fis.close();fos.close();} catch (Exception e2) {System.out.println(e2);}}}

字符流读写：

public static void main(String[] args) {String path = "D:/study_project/1.jpg";String path1 = "D:/study_project/2.jpg";String path2 = "D:/study_project/java-io-test.txt";String path3 = "D:/study_project/java-io-test-to.txt";readChar(path2,path3);}public static void readChar(String fromPath,String toPath){BufferedReader read  = null;BufferedWriter write  = null;int len = 20;char[] buffer = new char[len];try {read =  new BufferedReader(new InputStreamReader(new FileInputStream(fromPath), "utf8"));write = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(toPath),"utf8"));while ((read.read(buffer, 0, len)!=-1) && buffer.length > 0) {write.write(buffer, 0, len);}write.flush();} catch (FileNotFoundException e) {e.printStackTrace();System.out.println("文件没有找到");} catch (IOException e) {e.printStackTrace();System.out.println("文件读取异常");} finally {try {read.close();write.close();} catch (Exception e2) {System.out.println(e2);}}}

0 0