[Java 基础] 使用java.util.zip包压缩和解压缩文件

File file = new File("F:/zippath.zip");
ZipFile zipFile = new ZipFile(file);
System.out.println("压缩文件的名称为：" + zipFile.getName());

/** 压缩单个文件*/
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();
    }
}

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

/** 一次性压缩多个文件，文件存放至一个文件夹中*/
public static void ZipMultiFile(String filepath ,String zippath) {
    try {
        File file = new File(filepath);// 要被压缩的文件夹
        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();
    }
}

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

/**  解压缩（解压缩单个文件）*/
public static void ZipContraFile(String zippath ,String outfilepath ,String filename) {
    try {
        File file = new File(zippath);//压缩文件路径和文件名
        File outFile = new File(outfilepath);//解压后路径和文件名
        ZipFile zipFile = new ZipFile(file);
        ZipEntry entry = zipFile.getEntry(filename);//所解压的文件名
        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();
    }
}

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

/**  解压缩（压缩文件中包含多个文件）可代替上面的方法使用。
 * ZipInputStream类
 * 当我们需要解压缩多个文件的时候，ZipEntry就无法使用了，
 * 如果想操作更加复杂的压缩文件，我们就必须使用ZipInputStream类
 * */
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("解压缩" + entry.getName() + "文件");
            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();
    }
}

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