JSP上面實現(xiàn)目錄壓縮

    zip方法 zipPath參數(shù)為保存zip的文件路徑 srcPath參數(shù)為需要壓縮的目錄 在linux window上面測試無問題!主要是編碼問題比較麻煩~要是有其他異常 請留言 或者 有什么更好的方法 歡迎給更多的意見
    //zip zhe folder
    void zip(String zipPath, String srcPath,javax.servlet.jsp.JspWriter out) throws Exception {
    FileOutputStream output = null;
    ZipOutputStream zipOutput = null;
    try{
    output = new FileOutputStream(zipPath);
    zipOutput = new ZipOutputStream(output);
    zipEntry(zipOutput,srcPath,srcPath,zipPath);
    }catch(Exception e){
    out.print("file zip error");
    }finally{
    if(zipOutput!=null)zipOutput.close();
    }
    out.print("zip ok"+zipPath);
    }
    //add the zip entry
    void zipEntry(ZipOutputStream zipOs, String initPath,String filePath,String zipPath) throws Exception {
    String entryName = filePath;
    File f = new File(filePath);
    if (f.isDirectory()){// ??
    String[] files = f.list();
    for(int i = 0; i < files.length; i++)
    zipEntry(zipOs, initPath, filePath + File.separator + files[i],zipPath);
    return;
    }
    String chPh = initPath.substring(initPath.lastIndexOf("/") + 1);// ?????
    int idx=initPath.lastIndexOf(chPh);
    if (idx != -1) {
    entryName = filePath.substring(idx);
    }
    ZipEntry entry;
    entry = new ZipEntry(entryName);
    File ff = new File(filePath);
    if(ff.getAbsolutePath().equals(zipPath))return;
    entry.setSize(ff.length());
    entry.setTime(ff.lastModified());
    //the CRC efficacy
    entry.setCrc(0);
    CRC32 crc = new CRC32();
    crc.reset();
    zipOs.putNextEntry(entry);
    int len = 0;
    byte[] buffer = new byte[2048];
    int bufferLen = 2048;
    FileInputStream input =null;
    try{
    input = new FileInputStream(filePath);
    while ((len = input.read(buffer, 0, bufferLen)) != -1) {
    zipOs.write(buffer, 0, len);
    crc.update(buffer, 0, len);
    }
    }catch(Exception e){
    }finally{
    if(input!=null)input.close();
    }
    entry.setCrc(crc.getValue());
    }