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java 压缩 zip 跟tar包方法

2012-12-19 
java 压缩 zip 和tar包方法tar包压缩方法/*** 压缩文件为TAR包。并删除之前文件* @author liujunliang* @cr

java 压缩 zip 和tar包方法
tar包压缩方法

/**
     * 压缩文件为TAR包。并删除之前文件
     * @author liujunliang
     * @creaetime Aug 2, 2011 3:21:46 PM
     * @param filesPath  文件路径
     * @param tarPath tar 路径
     */
public static void fileTar(String filesPath, String tarPath) {
List<String> list = null;
list = file2tar(filesPath, tarPath);

// 循环遍历删除备份日志文件
if (list != null && list.size() > 0) {
for (int i = 0; i < list.size(); i++) {
deleteFile(list.get(i)); // 备份后进行日志文件的删除
}
}
}
   
    /**
     * 删除单个文件
     * @param fileName 要删除的文件的文件名
     * @return boolean 单个文件删除成功返回true,否则返回false
     */
    public static boolean deleteFile(String fileName) {
        File file = new File(fileName);
        // 如果文件路径所对应的文件存在,并且是一个文件,则直接删除
        if ( file.exists() && file.isFile() ) {
            if ( file.delete() ) {
                return true;
            }
            else {
                return false;
            }
        }
        else {
            return false;
        }
    }

private static List<String> file2tar(String filesPath, String tarPath) {

List<String> list = new ArrayList<String>();
    //文件个数
    int count = 0;
    //获取日志参数信息
    LogParamModel logParam = LogQueneFactory.getInstance().logMap
        .get(LogConstant.LOG_PARAMS);
File fileDirectory = new File(filesPath);
if (!fileDirectory.isDirectory()) {
return null;
}
int length = fileDirectory.listFiles().length;
File[] files = fileDirectory.listFiles();
TarEntry tarEn = null;
TarOutputStream tout = null;
FileOutputStream fout = null;
FileInputStream in = null;
try {
File tarFile = new File(tarPath);
if (!tarFile.exists()) {
tarFile.createNewFile();
}
fout = new FileOutputStream(tarFile);
tout = new TarOutputStream(fout);
// 循环压缩文本文件到tar格式文件
for (int i = 0; i < length; i++) {
if (!(files[i].getName().contains(LogConstant.TEMP_NAME))) {
String filename = fileDirectory.getPath() + File.separator
+ files[i].getName();
in = new FileInputStream(filename);
tarEn = new TarEntry(files[i]);
tarEn.setName(files[i].getName());
tout.putNextEntry(tarEn);
int num;
while ((num = in.read(B_ARRAY)) != -1) {
tout.write(B_ARRAY, 0, num);
}

tout.closeEntry();
in.close();
count++;
list.add(filename);
}
//判断文件个数
                if(count == logParam.getFileCount()){
                break;
                }
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(in !=null){
in.close();
}
tout.close();
fout.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return list;
}  

zip包压缩方式

/**
     * 方法描述:把文件或者文件夹压缩为ZIP格式
     * @author ljl
     * @creaetime Jan 13, 2011 5:56:13 PM
     * @param zipSrc 压缩后保存的路径
     * @param fileSrc 要压缩的文件或文件夹的路径
     * @param zipPath zip路径
     * @return boolean 成功返回true 失败返回false
     */
    public static boolean fileZip(String zipSrc, String zipPath, String fileSrc) {
        boolean success = true; // 压缩成功标志
        File srcpath = new File(fileSrc);
        ZipOutputStream out = null;
        FileOutputStream outputStream = null;
        File zipSrcFile = null;
        List<String> list = new ArrayList<String>();
        try {
            zipSrcFile = new File(zipPath);
            // 判断是否有文件夹
            if ( !zipSrcFile.isDirectory() ) {
               boolean zipFlag = zipSrcFile.mkdirs();
               if(!zipFlag){
               LogFactory.getLogMessage().warn(LogConstant.RUN_LOG_TYPE,"mkzip is failure");
               }
            }
            StringBuffer stringBuffer = new StringBuffer(
                    LogConstant.STRING_MAX_LENGTH);
            stringBuffer.append(zipPath);
            stringBuffer.append(zipSrc);
            outputStream = new FileOutputStream(stringBuffer.toString());
            out = new ZipOutputStream(outputStream); // 创建压缩输出流
            out.setEncoding("utf-8");
           
            compress(srcpath, out, "",list); // 开始压缩
        }
        catch (Exception ex) {
        LogFactory.getLogMessage().error(LogConstant.RUN_LOG_TYPE,LogConstant.COMPRESSED_FILE_ERROR);
            ex.printStackTrace();
            success = false;
        }
        finally {
            if ( out != null ) {
                try {
                    out.close();
                  
                }
                catch (IOException ex2){
                    ex2.printStackTrace();
                }
               
            }
            try {
            if(outputStream!=null){
            outputStream.close();
            }
} catch (IOException e) {
e.printStackTrace();
}
// 循环遍历删除备份日志文件
for(int i =0;i<list.size();i++){
deleteFile(list.get(i)); // 备份后进行日志文件的删除
}

        }
        return success;
    }

    /**
     * 方法描述:压缩文件的处理方法,fileZip掉用的方法
     * @author ljl
     * @creaetime Jan 13, 2011 5:55:52 PM
     * @param srcpath 源路径
     * @param out 输出
     * @param base 根路径
     * @throws Exception 异常
     */
    private static void compress(File srcpath, ZipOutputStream out, String base,List<String> list)
            throws Exception {
    //文件个数
    int count = 0;
    LogParamModel logParam = LogQueneFactory.getInstance().logMap
        .get(LogConstant.LOG_PARAMS);
        // 如果是目录
        if ( srcpath.isDirectory() ) {
            File[] files = srcpath.listFiles(); // 列举出目录中所有的内容
            out.putNextEntry(new ZipEntry(base
                    + BaseTools.getInstance().getSp())); // 放入zip对应的路径目录
            // 拼接打包路径的下划线
//            StringBuffer buffer = new StringBuffer(
//                    LogConstant.STRING_MAX_LENGTH);
//            buffer.append(base);
//            buffer.append(BaseTools.getInstance().getSp());

            if ( base.length() == LogConstant.LOG_LENGTH ) {
                base = "";
            }
//            else {
//                base = buffer.toString();
//            }
            // 循环压缩文本文件到ZIP格式文件
            for (int i = 0; i < files.length; i++) {

                if ( !files[i].isDirectory() ) {
                    // 判断是否是还需要往日志记录写入的临时文件
                    if (files[i].getName().contains(LogConstant.TEMP_NAME)) {
                            //LogFactory.getLogMessage().info((LogConstant.WRITE_FILE_ERROR));
                    }
                    else {
                        compress(files[i], out, files[i].getName(),list);// 压缩文本文件
                        list.add(srcpath + BaseTools.getInstance().getSp()
                                + files[i].getName());
                        count++;
                    }
                }
                //判断文件个数
                if(count == logParam.getFileCount()){
                break;
                }
            }

        }
        else { // 如果是文件
            if ( "".equals(base) ) {
                out.putNextEntry(new ZipEntry(base
                        + BaseTools.getInstance().getSp()));
                base = srcpath.getName();
            }
            out.putNextEntry(new ZipEntry(base));
            FileInputStream in = new FileInputStream(srcpath);
            //读取长度
            int writeSize = 2048;
            byte[] data = new byte[writeSize];
            int b;
            while ((b = in.read(data)) != -1) {
                out.write(data, 0, b);
            }
            in.close();
        }
    }

    /**
     * 删除单个文件
     * @param fileName 要删除的文件的文件名
     * @return boolean 单个文件删除成功返回true,否则返回false
     */
    public static boolean deleteFile(String fileName) {
        File file = new File(fileName);
        // 如果文件路径所对应的文件存在,并且是一个文件,则直接删除
        if ( file.exists() && file.isFile() ) {
            if ( file.delete() ) {
                return true;
            }
            else {
                return false;
            }
        }
        else {
            return false;
        }
    }

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