用JAVA语言编写程序：文件一的内容复制到文件二，并且复制过去后小写变成大写

用JAVA语言编写程序：文件一的内容复制到文件二，并且复制过去后小写变成大写

package test3;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;


public class CopyFile {

private static void copyAndConvert(String sourceFile, String destinyFile) throws IOException{
InputStream is = null;
OutputStream os = null;
int b;
try {
is = new FileInputStream(sourceFile);
os = new FileOutputStream(destinyFile);
while((b = is.read()) != -1){
if ((b >= 97) && (b <= 122)){ //a的ASCII码是97，z的ASCII码是122
b -= 32;
}
os.write(b);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
os.close();
is.close();
}
}
public static void main(String[] args) throws IOException{
String sourceFile = "d:/book1.txt";
String destinyFile = "d:/book2.txt";
copyAndConvert(sourceFile, destinyFile);
}
}