Java基础——赋值文档及图片

来源：互联网发布：安卓手机检测软件知乎编辑：程序博客网时间：2024/05/16 00:31

复制文件demo

public class CopyTxt {
public static void main(String[] args) throws Exception{

File src = new File("in\\Android.doc");
File desc = new File("out\\CopyAndroid.doc");
copyFile(src,desc);
}

private static void copyFile(File src, File desc) throws Exception {
//创建一个带缓存的字符流带缓存的字符流依赖于字符流
BufferedReader r = new BufferedReader(new FileReader(src));
BufferedWriter w = new BufferedWriter(new FileWriter(desc));
//一次读一行
String line = null;

//如果没有读到最后一行则继续执行
while ((line = r.readLine())!=null) {
w.write(line);
w.newLine();
}
w.flush();
w.close();
r.close();
}
}

复制图片demo

public class CopyPhoto {

public static void main(String[] args)throws Exception{
File src = new File("in\\11.png");
File dest = new File("out\\Copy11.png");
copyPhoto(src,dest);
}

private static void copyPhoto(File src, File dest) throws Exception {
//赋值图片使用效率高的带缓存的字节流而带缓存的字节流依赖与普通的字节流
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(src));
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(dest));
byte[] b = new byte[1024];
int len = -1;
while ((len =bis.read(b))!=-1) {
bos.write(b, 0, len);
}
bos.flush();
bos.close();
bis.close();
}
}

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