带预览zip和jar文件功能的文件选择器，jar选择器,带预览zip和jar文件

带预览zip和jar文件功能的文件选择器，jar选择器,带预览zip和jar文件

带预览zip和jar文件功能的文件选择器

[Java]代码

    import java.util.zip.*;    public class ZipEntryFileProxy extends File {        ZipFileProxy zip;        ZipFile zipfile;        String name, path;        File parent;        ZipEntry entry;        public ZipEntryFileProxy(ZipFileProxy zip, ZipFile zipfile,                        String path, File parent) {        super("");        this.zip = zip;        this.zipfile = zipfile;        this.path = path;        this.parent = parent;        this.entry = zipfile.getEntry(path);        // determine if the entry is a directory        String tmp = path;        if(entry.isDirectory()) {            tmp = path.substring(0,path.length()-1);        }        // then calculate the name        int brk = tmp.lastIndexOf("/");        name = path;        if(brk != -1) {            name = tmp.substring(brk+1);        }    }    public boolean exists() { return true; }    public int hashCode() {        return name.hashCode() ^ 1234321;    }    public String getName() { return name; }    public String getPath() { return path; }    public boolean isDirectory() { return entry.isDirectory(); }    public boolean isAbsolute() { return true; }    public String getAbsolutePath() { return path; }    public File getAbsoluteFile() { return this; }    public File getCanonicalFile() { return this; }    public File getParentFile() { return parent; }    public boolean equals(Object obj) {        if(obj instanceof ZipEntryFileProxy) {            ZipEntryFileProxy zo = (ZipEntryFileProxy)obj;            if(zo.getAbsolutePath().equals(getAbsolutePath())) {                return true;            }        }        return false;    }    public InputStream getInputStream() throws IOException {            return zipfile.getInputStream(entry);    }    public File[] listFiles() {        Map children = (Map)zip.hash.get(path);        File[] files = new File[children.size()];        Iterator it = children.keySet().iterator();        int count = 0;        while(it.hasNext()) {            String name = (String)it.next();            files[count] = new ZipEntryFileProxy(zip, zipfile, name,this);            count++;        }        return files;    }}    public class ZipFileProxy extends File {         protected Map hash;         private ZipFile zipfile;         private File real_file;        public ZipFileProxy(File file) {            super(file.getAbsolutePath());            try {                this.hash = new HashMap();                this.real_file = file;                zipfile = new ZipFile(file,ZipFile.OPEN_READ);                hash.put("",new HashMap());                Enumeration en = zipfile.entries();                parse(en);            } catch (IOException ex) {                System.out.println(ex.getMessage());                ex.printStackTrace();            }        }        public String getPath() { return real_file.getPath(); }        public boolean exists() { return real_file.exists(); }        public String getName() { return real_file.getName(); }        public File[] getFiles(String dir) {            Map children = (Map)hash.get(dir);            File[] files = new File[children.size()];            Iterator it = children.keySet().iterator();            int count = 0;            while(it.hasNext()) {                String name = (String)it.next();                files[count] = new ZipEntryFileProxy(this, zipfile, name, this);                count++;            }            return files;        }        /* create a hashtable of the entries and their paths */        private void parse(Enumeration en) {            while(en.hasMoreElements()) {                ZipEntry ze = (ZipEntry)en.nextElement();                String full_name = ze.getName();                String name = full_name;                if(ze.isDirectory()) {                name = full_name.substring(0,full_name.length()-1);                 }                int brk = name.lastIndexOf("/");                String parent = "";                if(brk != -1) {                parent = name.substring(0,brk+1);                }                String node_name = name;                if(brk != -1) {                node_name = full_name.substring(brk+1);                }                if(ze.isDirectory()) {                HashMap children = new HashMap();                hash.put(full_name,children);                }                Map parent_children = (Map)hash.get(parent);                parent_children.put(full_name,"");            }        }    }    public class ZipFileSystemView extends FileSystemView {        public ZipFileSystemView() throws IOException { }        public File createNewFolder(File file) { return null; }        public File createFileObject(File dir, String filename) {            if(dir instanceof ZipEntryFileProxy) {            ZipEntryFileProxy zdir = (ZipEntryFileProxy) dir;            return new ZipEntryFileProxy(zdir.zip, zdir.zipfile, filename, dir);        }        return super.createFileObject(dir,filename);    }        public File getChild(File dir, String filename) {            if(dir instanceof ZipEntryFileProxy) {                ZipEntryFileProxy zdir = (ZipEntryFileProxy) dir;                return new ZipEntryFileProxy(zdir.zip,zdir.zipfile,                        dir.getPath()+filename,dir);             }             return super.getChild(dir,filename);        }        public String getSystemDisplayName(File f) {            if(f instanceof ZipEntryFileProxy) {            return f.getName();        }        return super.getSystemDisplayName(f);    }    public File getParentDirectory(File dir) {        if(dir instanceof ZipEntryFileProxy) {            return dir.getParentFile();        }        return super.getParentDirectory(dir);    }    public File[] getFiles(File dir, boolean useFileHiding) {        if(dir.getName().endsWith(".zip")) {            ZipFileProxy proxy = new ZipFileProxy(dir);            File[] fs = proxy.getFiles("");            return fs;        }        if(dir instanceof ZipEntryFileProxy) {            return dir.listFiles();        }        return super.getFiles(dir,useFileHiding);    }    public Boolean isTraversable(File f) {        if(f.getName().endsWith(".zip")) {            return new Boolean(true);        }        if(f instanceof ZipEntryFileProxy) {            boolean b = ((ZipEntryFileProxy)f).isDirectory();            return new Boolean(b);        }        return super.isTraversable(f);    } }    public class ZipTest {        public static void main(String[] args) throws Exception {             FileSystemView fsv = new ZipFileSystemView();             JFileChooser chooser = new JFileChooser(".");             chooser.setFileSystemView(fsv);             chooser.showOpenDialog(null);             File file = chooser.getSelectedFile();                    System.out.println("Got the file: " + file + " " + file.getClass());            InputStream in = null;             if(file instanceof ZipEntryFileProxy) {                            in = ((ZipEntryFileProxy)file).getInputStream();             } else {                 in = new FileInputStream(file);             }         }     }