java对文件进行解压操作-RAR文件

每天分享java小知识 小干活，欢迎关注转发评论交流，每天一点进步！

package com.zldc.oaToKnowledgePlugin.util;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.springframework.util.StringUtils;
/**
 * 解压Zip文件工具类
 * 
 * @author pzx
 * 
 */
public class ZipUtil {
	private static final int buffer = 2048;
	/**
	 * @param path 文件路径
	 * @param savePath 要解压到路径
	 * @param reName 解压后的文件名称
	 * @return
	 */
	public static boolean unZip(String path, String savePath, String reName) {
		int count = -1;
		File file = null;
		InputStream is = null;
		FileOutputStream fos = null;
		BufferedOutputStream bos = null;
		File savepathFile = new File(savePath); // 创建保存目录
		if (!savepathFile.exists()) {
			savepathFile.mkdirs();
		}
		ZipFile zipFile = null;
		try {
			zipFile = new ZipFile(path);
			Enumeration<?> entries = zipFile.entries();
			while (entries.hasMoreElements()) {
				byte buf[] = new byte[buffer];
				ZipEntry entry = (ZipEntry) entries.nextElement();
				String filename = entry.getName().substring(entry.getName().lastIndexOf("\\") + 1,
						entry.getName().length());
				boolean ismkdir = false;
				if (filename.lastIndexOf("/") != -1) { // 检查此文件是否带有文件夹
					ismkdir = true;
				}
				if (!StringUtils.isEmpty(reName)) {
					filename = savePath + reName;
				} else {
					filename = savePath + filename;
				}
				if (entry.isDirectory()) { // 如果是文件夹先创建
					file = new File(filename);
					file.mkdirs();
					continue;
				}
				file = new File(filename);
				if (!file.exists()) { // 如果是目录先创建
					if (ismkdir) {
						new File(filename.substring(0, filename.lastIndexOf("/"))).mkdirs(); // 目录先创建
					}
				}
				file.createNewFile(); // 创建文件
				is = zipFile.getInputStream(entry);
				fos = new FileOutputStream(file);
				bos = new BufferedOutputStream(fos, buffer);
				while ((count = is.read(buf)) > -1) {
					bos.write(buf, 0, count);
				}
				bos.flush();
				bos.close();
				fos.close();
				is.close();
			}
			zipFile.close();
		} catch (IOException ioe) {
			ioe.printStackTrace();
			return false;
		} finally {
			try {
				if (bos != null) {
					bos.close();
				}
				if (fos != null) {
					fos.close();
				}
				if (is != null) {
					is.close();
				}
				if (zipFile != null) {
					zipFile.close();
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		
		return true;
	}
}