【IO流】FileReader,FileWriter完成文件的copy

来源：互联网发布：淘宝宝贝截图编辑：程序博客网时间：2024/06/06 01:12

FileReader,FileWriter完成文件的copy

/** * 使用FileReader,FileWriter完成文件的copy *  * @author xiazhang * @date   2017-6-4 */public class FileReaderWriterCopyTest {/** * 拷贝文件 *  * @param srcFile 源文件 * @param targetFile 目标文件 */public static void copyFile(File srcFile, File targetFile){if(srcFile != null && srcFile.exists() && srcFile.isFile()){if(!targetFile.exists()){try {targetFile.createNewFile();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}try {FileReader fr = new FileReader(srcFile);FileWriter fw = new FileWriter(targetFile);/*//一次读取一个字符 速度较慢int content = fr.read();while (content != -1){fw.write(content);//写入字符content = fr.read();}*/char[] cbuf = new char[256];int num = 0;while((num = fr.read(cbuf)) != -1){fw.write(cbuf,0,num);}/*num = fr.read(cbuf);while(num != -1){fw.write(cbuf,0,num);num = fr.read(cbuf);}*/fr.close();fw.close();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}public static void main(String[] args) {File srcFile = new File("fileTest.txt");File targetFile = new File("fileTest2.txt");copyFile(srcFile, targetFile);}}

阅读全文

0 0