关于解压ZIP文件的类解决了中文问题及提高了解压的速度．希望对大家有所帮助．
import javaio*;
import javautil*;
import javautilzip*;
import sunio*;
public class linzip
{
public static String maketoGB(String str)
{
try{
String str = new String(strgetBytes(_)GB);
return str;
}catch(UnsupportedEncodingException ioe){
return str;
}
}
public static void main(String[] args)
{
if (argslength < 1){
System.err.println("Required parameter missing!");
System.exit(-1);
}
File infile = new File(args[0]);
try{
//检查是否是ZIP文件
ZipFile zip = new ZipFile(infile);
zip.close();
//建立与目标文件的输入连接
ZipInputStream in = new ZipInputStream(new FileInputStream(infile));
ZipEntry file = in.getNextEntry();
int i =infile.getAbsolutePath().lastIndexOf('.');
String dirname = new String();
if ( i != -1 )
dirname = infile.getAbsolutePath().substring(0,i);
else
dirname = infile.getAbsolutePath();
File newdir = new File(dirname);
newdir.mkdir();
byte[] c = new byte[1024];
int len;
int slen;
while (file != null){
i = make8859toGB(file.getName()).replace('/','\\').lastIndexOf('\\');
if ( i != -1 ){
File dirs = new File(dirname+File.separator+make8859toGB(file.getName()).replace('/','\\').substring(0,i));
dirs.mkdirs();
dirs = null;
}
System.out.print("Extract "+make8859toGB(file.getName()).replace('/','\\')+" ........ ");
if (file.isDirectory()){
File dirs = new File(make8859toGB(file.getName()).replace('/','\\'));
dirs.mkdir();
dirs = null;
}
else{
FileOutputStream out = new FileOutputStream(dirname+File.separator+make8859toGB(file.getName()).replace('/','\\'));
while((slen = in.read(c,0,c.length)) != -1)
out.write(c,0,slen);
out.close();
}
System.out.print("O.K.\n");
file = in.getNextEntry();
}
in.close();
}catch(ZipException zipe){
MessageBox(0,infile.getName()+"不是一个ZIP文件！","文件格式错误",16);
}catch(IOException ioe){
MessageBox(0,"读取"+args[0]+"时错误！","文件读取错误",16);
}catch(Exception i){
System.out.println("over");
}
}
/**
* @dll.import("USER32", auto)
*/
public static native int MessageBox(int hWnd, String lpText, String lpCaption, int uType);
}
以上程序在WIN98&VJ6.0测试通过．
