一、创建压缩文件

1、创建目录

File zipFile = new File("G:/files/test.zip");
try(ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile)))){
	ZipEntry userFolder = new ZipEntry("users/albert/");
	out.putNextEntry(userFolder);
	out.closeEntry();
}catch(Exception e){
	e.printStackTrace();
}

压缩文件结构如下：

└─users
    └─albert

2、创建普通文件

File zipFile = new File("G:/files/test.zip");
try(ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile)))){
	String introduction = "My name is Albert.";
	try(InputStream ins = new ByteArrayInputStream(introduction.getBytes())){
		ZipEntry file = new ZipEntry("introduction.txt");
		out.putNextEntry(file); 
		int len = 0;
		byte[] buf = new byte[1024];
		while ((len = ins.read(buf)) != -1) {
			out.write(buf, 0, len);
		}
		out.closeEntry();
	}
}catch(Exception e){
	e.printStackTrace();
}

压缩文件结构如下：

    introduction.txt
如果要创建指定目录下的文件，只需要指定文件目录即可：
ZipEntry file = new ZipEntry("users/albert/introduction.txt");

压缩文件结构如下：

└─users
    └─albert
        introduction.txt

二、读取压缩文件

  hello.txt
│
└─users
    └─albert
        introduction.txt

读取如上结构的压缩文件：

File zipFile = new File("G:/files/test.zip");
try(ZipInputStream in = new ZipInputStream(new FileInputStream(zipFile))){
	ZipEntry entry = null;
	while((entry = in.getNextEntry()) != null){
		if(!entry.isDirectory()){
			StringBuilder content = new StringBuilder();
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			int len = 0;
			byte[] buf = new byte[1024 * 4];
			while ((len = in.read(buf)) != -1) {
				out.write(buf, 0, len);
			}
			byte[] array = out.toByteArray();
			content.append(new String(array, 0, array.length, "UTF-8"));
			in.closeEntry();
			
			System.out.println(entry.getName() + ": " + content);
		}
	}
}catch(Exception e){
	e.printStackTrace();
}

输出：

hello.txt: Hello World!
users/albert/introduction.txt: My name is Albert.
参考资料：