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java zip压缩与解压

程序员文章站 2022-05-15 12:53:37
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package com.yiban.rec.bill.parse.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipInputStream;

import org.apache.commons.io.IOUtils;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;

public class ZipUtil {
	private static final int buffer = 2048;

	/**
	 * 
	 * @param zipFilePath
	 *            压缩文件名
	 * @param chartSet
	 *            字符编码
	 * @return 文件字符串
	 * @throws Exception
	 *             重新抛出异常
	 */
	public static String unZipFiles(String zipFilePath, String chartSet) throws Exception {
		ZipFile zipFile = null;
		try {
			File f = new File(zipFilePath);
			if ((!f.exists()) && (f.length() <= 0)) {
				throw new RuntimeException("要解压的文件不存在!");
			}
			// 一定要加上编码,之前解压另外一个文件,没有加上编码导致不能解压
			zipFile = new ZipFile(f, chartSet);
			Enumeration<ZipEntry> e = zipFile.getEntries();
			StringBuilder sb = new StringBuilder();
			while (e.hasMoreElements()) {
				// 使用ant.jar 的解压缩工具包代替jdk自带的
				org.apache.tools.zip.ZipEntry zipEnt = e.nextElement();
				if (!zipEnt.isDirectory()) {
					// 读写文件
					InputStream is = zipFile.getInputStream(zipEnt);
					BufferedInputStream bis = new BufferedInputStream(is);
					List<String> list = IOUtils.readLines(bis, Charset.forName(chartSet));
					for (String str : list) {
						sb.append(str);
					}
					bis.close();
					is.close();
				}
			}
			return sb.toString();
		} catch (Exception e) {
			throw e;
		} finally {
			if (zipFile != null) {
				zipFile.close();
			}
		}
	}

	/**
	 * 解压Zip文件
	 * 
	 * @param path
	 *            文件目录
	 */
	public static void unZip(String path) {
		int count = -1;
		String savepath = "";

		File file = null;
		InputStream is = null;
		FileOutputStream fos = null;
		BufferedOutputStream bos = null;

		savepath = path.substring(0, path.lastIndexOf(".")) + File.separator; // 保存解压文件目录
		new File(savepath).mkdir(); // 创建保存目录
		ZipFile zipFile = null;
		try {
			zipFile = new ZipFile(path, "gbk"); // 解决中文乱码问题
			Enumeration<?> entries = zipFile.getEntries();

			while (entries.hasMoreElements()) {
				byte buf[] = new byte[buffer];

				ZipEntry entry = (ZipEntry) entries.nextElement();

				String filename = entry.getName();
				boolean ismkdir = false;
				if (filename.lastIndexOf("/") != -1) { // 检查此文件是否带有文件夹
					ismkdir = true;
				}
				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();
		} 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();
			}
		}
	}
	
	public static void main(String[] args)  
    {  
        //unZip("F:\\110000002.zip");
		unZip("E:\\2088721459821834-2018-12-11.zip");
        String f = "E:\\2088721459821834-2018-12-11";
        File file = new File(f);
        String[] test=file.list();
        for(int i=0;i<test.length;i++){
            System.out.println(test[i]);
        }
        
       /* System.out.println("------------------");
        
        String fileName = "";
        
        File[] tempList = file.listFiles();
        for (int i = 0; i < tempList.length; i++) {
            if (tempList[i].isFile()) {
                System.out.println("文     件:"+tempList[i]);
                
                fileName = tempList[i].getName();
                
                System.out.println("文件名:"+fileName);
            }
            if (tempList[i].isDirectory()) {
                System.out.println("文件夹:"+tempList[i]);
            }
        }*/
    } 

}

相关标签: zip压缩 zip解压