在文档管理系统中需要实现zip文件的预览，一般的做法是将zip文件解压，然后获取此目录下的文件信息，此处代码为利用代码直接实现zip文件的解压：
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/**
* <基于java代码解压zip文件/>
*
* @author Kaven Mei
* @company KAVEN(www.kaven.cn)
* @date 2020年4月10日 上午9:44:45
* @version 1.0
*/
public class ZipTest {
private static ZipFile zipFile;
public static void main(String[] args) {
String directoryPath = "F:/zipFile/";// 解压路径
String filePath = "F:/zipFile/nginx-1.8.1.zip";// 解压文件
try {
printZipTxt(filePath);
unZipFiles(filePath, directoryPath);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 获取zip文件中的内容
*
* @param zipPathStr
* @throws IOException
*/
public static void printZipTxt(String zipPathStr) throws IOException {
zipFile = new ZipFile(zipPathStr);
for (Enumeration e = zipFile.entries(); e.hasMoreElements();) {
ZipEntry entry = e.nextElement();
System.out.println("文件名:" + entry.getName() + ", 内容如下:");
if (entry.getName().toLowerCase().endsWith(".txt")) {
InputStream is = null;
is = zipFile.getInputStream(entry);
byte[] b = new byte[1024];
int leng = -1;
String txtStr = "";
while ((leng = is.read(b)) != -1) {
txtStr += new String(b, 0, leng);
}
System.out.println(txtStr);
if (is != null) {
is.close();
}
}
}
}
/**
* 创建zip中文件目录
*
* @param zipPath
* @param descDir
* @throws IOException
*/
public static void unZipFiles(String zipPath, String descDir) throws IOException {
unZipFiles(new File(zipPath), descDir);
}
/**
* 解压内容
*
* @param zipFile
* @param descDir
* @throws IOException
*/
@SuppressWarnings("rawtypes")
public static void unZipFiles(File fileZip, String descDir) throws IOException {
File pathFile = new File(descDir);
if (!pathFile.exists()) {
pathFile.mkdirs();
}
zipFile = new ZipFile(fileZip);
for (Enumeration entries = zipFile.entries(); entries.hasMoreElements();) {
ZipEntry entry = (ZipEntry) entries.nextElement();
String zipEntryName = entry.getName();
InputStream in = zipFile.getInputStream(entry);
String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
// 判断路径是否存在,不存在则创建文件路径
File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
if (!file.exists()) {
file.mkdirs();
}
// 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
if (new File(outPath).isDirectory()) {
continue;
}
// 输出文件路径信息
System.out.println(outPath);
OutputStream out = new FileOutputStream(outPath);
byte[] buf1 = new byte[1024];
int len;
while ((len = in.read(buf1)) > 0) {
out.write(buf1, 0, len);
}
in.close();
out.close();
}
System.out.println("******************解压完毕********************");
}
}