JAVA壓縮和解壓縮

java中的每一個壓縮檔案都是可以使用ZipFile來進行表示的。

        File file = new File("F:/zippath.zip");
        ZipFile zipFile = new ZipFile(file);
        System.out.println("壓縮檔案的名稱為：" + zipFile.getName());

壓縮單個檔案

    /** 壓縮單個檔案*/
    public static void ZipFile(String filepath ,String zippath) {
    	try {
            File file = new File(filepath);
            File zipFile = new File(zippath);
            InputStream input = new FileInputStream(file);
            ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
            zipOut.putNextEntry(new ZipEntry(file.getName()));
            int temp = 0;
            while((temp = input.read()) != -1){
                zipOut.write(temp);
            }
            input.close();
            zipOut.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

應用：

ZipFile("d:/hello.txt", "d:/hello.zip");

壓縮多個檔案（資料夾）

    /** 一次性壓縮多個檔案，檔案存放至一個資料夾中*/
    public static void ZipMultiFile(String filepath ,String zippath) {
		try {
	        File file = new File(filepath);// 要被壓縮的資料夾
	        File zipFile = new File(zippath);
	        InputStream input = null;
	        ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
	        if(file.isDirectory()){
	            File[] files = file.listFiles();
	            for(int i = 0; i < files.length; ++i){
	                input = new FileInputStream(files[i]);
	                zipOut.putNextEntry(new ZipEntry(file.getName() + File.separator + files[i].getName()));
	                int temp = 0;
	                while((temp = input.read()) != -1){
	                    zipOut.write(temp);
	                }
	                input.close();
	            }
	        }
	        zipOut.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

應用：

ZipMultiFile("f:/uu", "f:/zippath.zip");

解壓縮單個檔案

    /**  解壓縮（解壓縮單個檔案）*/
    public static void ZipContraFile(String zippath ,String outfilepath ,String filename) {
		try {
	        File file = new File(zippath);//壓縮檔案路徑和檔名
	        File outFile = new File(outfilepath);//解壓後路徑和檔名
	        ZipFile zipFile = new ZipFile(file);
	        ZipEntry entry = zipFile.getEntry(filename);//所解壓的檔名
	        InputStream input = zipFile.getInputStream(entry);
	        OutputStream output = new FileOutputStream(outFile);
	        int temp = 0;
	        while((temp = input.read()) != -1){
	            output.write(temp);
	        }
	        input.close();
	        output.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

應用：

ZipContraFile("d:/hello.zip","d:/eee.txt", "hello.txt");

 解壓縮多個檔案

ZipInputStream類：

當我們需要解壓縮多個檔案的時候，ZipEntry就無法使用了。

 如果想操作更加複雜的壓縮檔案，我們就必須使用ZipInputStream類。

    /**  解壓縮（壓縮檔案中包含多個檔案）可代替上面的方法使用。
     * ZipInputStream類
     * 當我們需要解壓縮多個檔案的時候，ZipEntry就無法使用了，
     * 如果想操作更加複雜的壓縮檔案，我們就必須使用ZipInputStream類
     * */
    public static void ZipContraMultiFile(String zippath ,String outzippath){
    	try {
            File file = new File(zippath);
            File outFile = null;
            ZipFile zipFile = new ZipFile(file);
            ZipInputStream zipInput = new ZipInputStream(new FileInputStream(file));
            ZipEntry entry = null;
            InputStream input = null;
            OutputStream output = null;
            while((entry = zipInput.getNextEntry()) != null){
                System.out.println("解壓縮" + entry.getName() + "檔案");
                outFile = new File(outzippath + File.separator + entry.getName());
                if(!outFile.getParentFile().exists()){
                    outFile.getParentFile().mkdir();
                }
                if(!outFile.exists()){
                    outFile.createNewFile();
                }
                input = zipFile.getInputStream(entry);
                output = new FileOutputStream(outFile);
                int temp = 0;
                while((temp = input.read()) != -1){
                    output.write(temp);
                }
                input.close();
                output.close();
            }
		} catch (Exception e) {
			e.printStackTrace();
		}
    }

應用：

        ZipContraMultiFile("f:/zippath.zip", "d:/");
        ZipContraMultiFile("d:/hello.zip", "d:/");