Posted on 2006-06-20 13:15
JavaDoIt 阅读(481)
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public static void Url() throws MalformedURLException{
File file = new File("b.txt");
URL url =null;
url = file.toURL();
String dir =file.getPath();
System.out.print(file.getAbsolutePath());
file.renameTo(new File(dir,file.getName()));
}
public static void cope()throws IOException{
File file = new File("b.txt");
File file2 = new File("c.txt");
if(!file2.exists()){
file2.createNewFile();
}
FileInputStream in = new FileInputStream(file);
// InputStream in = url.openStream();
FileOutputStream out = new FileOutputStream(file2);
byte[] buffer = new byte[4096];
int data;
while((data = in.read(buffer))!=-1){
out.write(buffer,0,data);
}
in.close();
out.close();
}
public static void read() throws IOException{
File file = new File("b.txt");
System.out.print("Overwrite existing file " + file.getName() +"? (Y/N): ");
System.out.flush();
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String readtowrite = in.readLine();
BufferedWriter ot = new BufferedWriter(new FileWriter("b.txt"));
ot.write(readtowrite);
ot.close();
}
public static void test() throws IOException{
File file = new File("b.txt");
if(!file.exists()){
file.createNewFile();
}
File file2 = new File("c.txt");
if(!file2.exists()){
file2.createNewFile();
}
FileInputStream in = new FileInputStream(file);
// InputStream in = url.openStream();
FileOutputStream out = new FileOutputStream(file2);
byte[] buffer = new byte[4096];
int data;
while((data = in.read(buffer))!=-1){
out.write(buffer,0,data);
}
in.close();
out.close();
}
public static void compress() throws IOException{
File file = new File("b.txt");
FileInputStream in = new FileInputStream(file);
String to =file.getName()+".zip";
GZIPOutputStream out = new GZIPOutputStream(new FileOutputStream("e:/"+to));
byte[] buffer = new byte[4096];
int data;
while((data = in.read(buffer))!=-1){
out.write(buffer,0,data);
}
in.close();
out.close();
}