Java自动解压文件实例代码

import java.io.file;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.inputstream;
import java.io.outputstream;
import java.util.enumeration;
import java.util.zip.zipentry;
import java.util.zip.zipfile;

public class unzipper {

    /**
     * 解压文件到当前目录 功能相当于右键 选择解压
     * @param zipfile
     * @param
     * @author gabriel
     */
    @suppresswarnings("rawtypes")
    public static void unzipfiles(file zipfile)throws ioexception{
        //得到压缩文件所在目录
        string path=zipfile.getabsolutepath();
        path=path.substring(0,path.lastindexof("\\"));
       // system.out.println("path "+path);
        zipfile zip = new zipfile(zipfile);
        for(enumeration entries =zip.entries();
                entries.hasmoreelements();){
            zipentry entry = (zipentry)entries.nextelement();
            string zipentryname = entry.getname();
            inputstream in = zip.getinputstream(entry);
            //outpath输出目录
            string outpath = (path+"\\"+zipentryname).replaceall("\\*", "/");;
            //system.out.println("outpath "+outpath);
            //判断路径是否存在,不存在则创建文件路径
            file file = new file(outpath.substring(0, outpath.lastindexof('/')));
            if(!file.exists()){
                file.mkdirs();
            }
            //判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
            if(new file(outpath).isdirectory()){
                continue;
            }
            //输出文件路径信息
            system.out.println(outpath);

            outputstream out = new fileoutputstream(outpath);
            byte[] buf1 = new byte[1024];
            int len;
            while((len=in.read(buf1))>0){
                out.write(buf1,0,len);
            }
            in.close();
            out.close();
            }
        system.out.println("******************解压完毕********************");
    }

   
    public static void main(string[] args) {
        try {
            unzipfiles(new file("d:\\all\\zip\\default.adiumemoticonset.zip"));
        } catch (ioexception e) {
            // todo auto-generated catch block
            e.printstacktrace();
        }
    }
}