import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class FileByteUtil {
public static void main(String[] args) throws Exception {
File file=new File( "f:/test.doc ");
byte[] fileByte = file2byte(file);
byte2file(fileByte, "f:/test2.doc ");
}
public static byte[] file2byte(File f) throws Exception {
return file2byte(f.getPath());
}
public static byte[] file2byte(String f) throws Exception {
try {
InputStream in = new FileInputStream(f);
byte[] tmp = new byte[512];
ByteArrayOutputStream out = new ByteArrayOutputStream();
int bytesRead = in.read(tmp);
while (bytesRead != -1) {
out.write(tmp, 0, bytesRead);
bytesRead = in.read(tmp);
}
return out.toByteArray();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
// writes byte [] to a file
public static void byte2file(byte[] data, String fn) throws Exception {
try {
OutputStream out = new FileOutputStream(fn);
out.write(data);
out.flush();
} catch (FileNotFoundException e) {
throw e;
} catch (IOException e) {
throw e;
}
}
}
posted on 2011-06-19 02:01
三刀流の逆風 閱讀(1115)
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