JAVA解壓縮文件

一、壓縮文件目錄"F:\mmd"

二、代碼實現

方式 一：採用的是jdk自帶的包java.util.zip.ZipOutputStream，不足之處，文件（夾）名稱帶中文時，出現亂碼問題。

<span style="font-family:Microsoft YaHei;font-size:12px;">package com.test;

import java.io.File;
import java.io.FileInputStream;
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;
import java.util.zip.ZipOutputStream;

public class TestZip {
	public static void main(String[] args) throws Exception {
		//壓縮文件
		String filePath = "F:/mmd/";
		String zipFile = "F:/mmd.zip";
		zipFiles(new File(filePath), zipFile);
		
		
		//解壓文件  
        unZipFiles(new File("F:/mmd.zip"), "F:/zipfile/"); 
	}

	/**
	 * 壓縮文件-由於out要在遞歸調用外,所以封裝一個方法用來 調用ZipFiles(ZipOutputStream out,String
	 * path,File... srcFiles)
	 * 
	 * @param zip
	 * @param path
	 * @param srcFiles
	 * @throws IOException
	 * @author isea533
	 */

	public static void zipFiles(File srcFile, String zipfile) throws Exception {
		File ff = new File(zipfile); // 根據文件路徑構造一個文件實例
		if (!ff.exists()) {
			ff.createNewFile();
		}
		FileOutputStream out = new FileOutputStream(zipfile); // 根據文件路徑構造一個文件輸出流
		ZipOutputStream zipOut = new ZipOutputStream(out); // 傳入文件輸出流對象,創建ZIP數據輸出流對象
		TestZip.zipFiles(zipOut, srcFile.listFiles(), zipfile, "");
		zipOut.close();
		out.close();
	}

	/**
	 * 壓縮文件及文件夾
	 * 
	 * @param zipOut
	 * @param files待壓縮的文件路徑
	 * @param zipfile  壓縮後的文件名稱
	 * @param path
	 * @throws Exception
	 */
	public static void zipFiles(ZipOutputStream zipOut, File[] files,String zipfile, String path) throws Exception {
		if (path != "") {
			path = path.replaceAll("\\*", "/");
			if (!path.endsWith("/")) {
				path += "/";
			}
		}
		for (File file : files) {
			if (file.isDirectory()) {
				File[] files2 = file.listFiles();
				zipFiles(zipOut, files2, zipfile, path + file.getName());
			} else {
				File f = new File(file.getAbsolutePath());
				FileInputStream in = new FileInputStream(f);// 創建文件輸入流對象
				String fileName = f.getName();// 得到當前文件的文件名稱
				ZipEntry entry = new ZipEntry(path + fileName);// 創建指向壓縮原始文件的入口
				zipOut.putNextEntry(entry);
				int nNumber = 0;
				byte[] buffer = new byte[1024];
				while ((nNumber = in.read(buffer)) != -1) {
					zipOut.write(buffer, 0, nNumber);// 向壓縮文件中輸出數據
				}
				in.close();
			}
		}
	}

	/**
	 * 解壓到指定目錄
	 * @param zipPath    
	 * @param descDir	  
	 */
	public static void unZipFiles(String zipPath, String descDir) throws IOException {
		unZipFiles(new File(zipPath), descDir);
	}

	/**
	 * 解壓文件到指定目錄
	 * 
	 * @param zipFile待解壓的文件
	 * @param descDir指定的解壓目錄
	 */
	public static void unZipFiles(File zipFile, String descDir) throws IOException {
		File pathFile = new File(descDir);
		if (!pathFile.exists()) {
			pathFile.mkdirs();
		}
		ZipFile zip = new ZipFile(zipFile);
		for (Enumeration entries = zip.entries(); entries.hasMoreElements();) {
			ZipEntry entry = (ZipEntry) entries.nextElement();
			String zipEntryName = entry.getName();
			InputStream in = zip.getInputStream(entry);
			String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
			File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));// 判斷路徑是否存在,不存在則創建文件路徑
			if (!file.exists()) {
				file.mkdirs();
			}
			if (new File(outPath).isDirectory()) {// 判斷文件全路徑是否爲文件夾,如果是上面已經上傳,不需要解壓
				continue;
			}
			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();
		}
	}

}
</span>

方法二、使用org.apache.tools.zip.ZipOutputStream（測試的中文名稱壓縮後也出現亂碼）

package com.test;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipOutputStream;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;

public class ZipCompress {
	static final int BUFFER = 1024;
	private File zipFile;

	public static void main(String[] args) throws Exception {
		ZipCompress testAntZip = new ZipCompress("F:\\mmdANT.zip");
		testAntZip.compress("F:\\mmd\\");

		testAntZip.decompressFile("F:/mmdANT.zip", "F:/adsff/");
	}

	public ZipCompress(String pathName) {
		zipFile = new File(pathName);
	}

	/**
	 * 壓縮
	 * @param srcPathName  壓縮文件目錄
	 */
	public void compress(String srcPathName) {
		File file = new File(srcPathName);
		if (!file.exists())
			throw new RuntimeException(srcPathName + "不存在！");
		try {
			FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
			CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
					new CRC32());
			ZipOutputStream out = new ZipOutputStream(cos);
			// out.setEncoding("utf-8");
			// //如果不加此句，壓縮文件依然可以生成，只是在打開和解壓的時候，會顯示亂碼，但是還是會解壓出來
			compress(file, out, "");
			out.close();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	private void compress(File file, ZipOutputStream out, String basedir) {
		/* 判斷是目錄還是文件 */
		if (file.isDirectory()) {
			this.compressDirectory(file, out, basedir);
		} else {
			this.compressFile(file, out, basedir);
		}
	}

	/** 壓縮一個目錄 */
	private void compressDirectory(File dir, ZipOutputStream out, String basedir) {
		if (!dir.exists()) {
			return;
		}
		File[] files = dir.listFiles();
		for (int i = 0; i < files.length; i++) {/* 遞歸 */
			compress(files[i], out, basedir + dir.getName() + "/");
		}
	}

	/** 壓縮一個文件 */
	private void compressFile(File file, ZipOutputStream out, String basedir) {
		if (!file.exists()) {
			return;
		}
		try {
			BufferedInputStream bis = new BufferedInputStream(
					new FileInputStream(file));
			ZipEntry entry = new ZipEntry(basedir + file.getName());
			out.putNextEntry(entry);
			int count;
			byte data[] = new byte[BUFFER];
			while ((count = bis.read(data, 0, BUFFER)) != -1) {
				out.write(data, 0, count);
			}
			bis.close();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * 解壓
	 */
	public void decompressFile(String zipFilePath, String releasePath)
			throws IOException {
		ZipFile zipFile = new ZipFile(zipFilePath);
		Enumeration<ZipEntry> enumeration = zipFile.getEntries();
		InputStream inputStream = null;
		FileOutputStream fileOutputStream = null;
		ZipEntry zipEntry = null;
		String zipEntryNameStr = "";
		String[] zipEntryNameArray = null;
		while (enumeration.hasMoreElements()) {
			zipEntry = enumeration.nextElement();
			zipEntryNameStr = zipEntry.getName();
			zipEntryNameArray = zipEntryNameStr.split("/");
			String path = releasePath;
			File root = new File(releasePath);
			if (!root.exists()) {
				root.mkdir();
			}
			for (int i = 0; i < zipEntryNameArray.length; i++) {
				if (i < zipEntryNameArray.length - 1) {
					path = path + File.separator + zipEntryNameArray[i];
					new File(path).mkdir();
				} else {
					if (zipEntryNameStr.endsWith(File.separator)) {
						new File(releasePath + zipEntryNameStr).mkdir();
					} else {
						inputStream = zipFile.getInputStream(zipEntry);
						fileOutputStream = new FileOutputStream(new File(
								releasePath + zipEntryNameStr));
						byte[] buf = new byte[1024];
						int len;
						while ((len = inputStream.read(buf)) > 0) {
							fileOutputStream.write(buf, 0, len);
						}
						inputStream.close();
						fileOutputStream.close();
					}
				}
			}
		}
		zipFile.close();
	}
}

方法三：可以用ant中的org.apache.tools.ant.taskdefs.Zip來實現，更加簡單。 （中文名稱不會出現亂碼）

package com.test;

import java.io.File;

import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Expand;
import org.apache.tools.ant.taskdefs.Zip;
import org.apache.tools.ant.types.FileSet;

public class ZipCompressByAnt {
	private File zipFile;

	public static void main(String[] args) {
		ZipCompressByAnt zipCompressByAnt = new ZipCompressByAnt(
				"F:\\mmdANT2.zip");
		zipCompressByAnt.compress("F:\\mmd\\");

		zipCompressByAnt.unZip("F:\\mmdANT2.zip", "F:\\testAnt");
	}

	public ZipCompressByAnt(String pathName) {
		zipFile = new File(pathName);
	}

	/**
	 * 壓縮
	 */
	public void compress(String srcPathName) {
		File srcdir = new File(srcPathName);
		if (!srcdir.exists())
			throw new RuntimeException(srcPathName + "不存在！");

		Project prj = new Project();
		Zip zip = new Zip();
		zip.setProject(prj);
		zip.setDestFile(zipFile);
		FileSet fileSet = new FileSet();
		fileSet.setProject(prj);
		fileSet.setDir(srcdir);
		// fileSet.setIncludes("**/*.java"); 包括哪些文件或文件夾
		// eg:zip.setIncludes("*.java");
		// fileSet.setExcludes(...); 排除哪些文件或文件夾
		zip.addFileset(fileSet);
		zip.execute();
	}

	/**
	 * 解壓
	 * @param sourceZip   待解壓文件路徑
	 * @param destDir     解壓到的路徑
	 */
	public void unZip(String sourceZip, String destDir) {
		// 保證文件夾路徑最後是"/"或者"\"
		char lastChar = destDir.charAt(destDir.length() - 1);
		if (lastChar != '/' && lastChar != '\\') {
			destDir += File.separator;
		}
		Project p = new Project();
		Expand e = new Expand();
		e.setProject(p);
		e.setSrc(new File(sourceZip)); 
		e.setOverwrite(false); 
		e.setDest(new File(destDir));
		e.setSrc(new File(sourceZip));
		e.setOverwrite(false);
		e.setDest(new File(destDir));
		/*
		ant下的zip工具默認壓縮編碼爲UTF-8編碼，
		而winRAR軟件壓縮是用的windows默認的GBK或者GB2312編碼
		所以解壓縮時要制定編碼格式
		*/
		e.setEncoding("utf-8");
		e.execute();
	}
}