Java读取压缩文件信息

不解压压缩文件，获取其中包含的文件，通过文件名检查是否包含非法文件。（后续再根据文件头或内容吧）

zip:

import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

private static void readZip(String fileName) {
        ZipFile zf = null;
        try {
            zf = new ZipFile(fileName);
            HashSet<ZipEntry> set = new HashSet<ZipEntry>();
            int fileCount = 0;
            int dirCount = 0;
            for (Enumeration<ZipEntry> entries = (Enumeration<ZipEntry>) zf.entries(); entries.hasMoreElements();) {
                ZipEntry ze = entries.nextElement();
                if (ze.isDirectory()) {
                    dirCount++;
                } else {
                    fileCount++;
                    String name = ze.getName();
                    for (String s : illegalString) {
                        if (name.toUpperCase().contains(s)) {
                            set.add(ze);
                            break;
                        }
                    }
                }
            }
            System.out.println("The package contains " + fileCount + " files and " + dirCount + " directories.
");
            if (set.size() <= 0) {
                System.out.println("PASS: ILLEGAL FILE NOT FOUND.");
            } else {
                System.out.println("Possible illegal files: 
");
                int index = 1;
                System.out.format("    %-10s%-80s%-20s %n%n", "NO.", "FileName", "Bytes");
                for (ZipEntry e : set) {
                    System.out.format("    %-10s%-80s%-20s %n%n", index, e.getName(), e.getSize());
                    index++;
                }
            }
        } catch (ZipException e) {
            System.out.println("INFO: The file format is not a common zip.");
        } catch (IOException e) {
            System.out.println("WARNING: IOException occured.");
        } catch (SecurityException e) {
            System.out.println("WARNING: The file is not accessible.");
        } catch (NullPointerException e) {
            System.out.println("WARNING: NullPointerException. May due to ZipEntry has no Size.");
        } finally {
            if (zf != null) {
                try {
                    zf.close();
                } catch (IOException e) {
                    System.out.println("WARNING: IOException occured when close file.");
                }
            }
        }
    }

tar:

import org.apache.tools.tar.TarEntry;
import org.apache.tools.tar.TarInputStream;

private static HashSet<String> readTar(String fileName) {
        TarInputStream tis = null;
        HashSet<String> set = null;
        try {
            tis = new TarInputStream(new FileInputStream(fileName));
            int dirCount = 0, fileCount = 0;
            set = new HashSet<String>();
            TarEntry te = tis.getNextEntry();
            while (te != null) {
                if (!te.isDirectory()) {
                    String name = te.getName();
                    for (String s : illegalString) {
                        if (name.toUpperCase().contains(s)) {
                            set.add(name);
                            break;
                        }
                    }
                    fileCount++;
                } else {
                    dirCount++;
                }
                te = tis.getNextEntry();
            }
            System.out.println("INFO: The package contains " + dirCount + " and " + fileCount + " files.");
            return set;
        } catch (FileNotFoundException e) {
            System.out.println("INFO: File not exist.");
        } catch (IOException e) {
            System.out.println("WARNING: IOException occured in TarInputStream.");
        } finally {
            if (tis != null) {
                try {
                    tis.close();
                } catch (IOException e) {
                    System.out.println("WARNING: IOException occured when close file.");
                }
            }
        }
        return set;
    }