java实现zip打包

红太狼 2022-03-20 04:46 241阅读 0赞

from:http://szhnet.iteye.com/blog/199059

本来是写到spaces live上的，可是代码的显示效果确实不怎么好看。在javaeye上试了试代码显示的顺眼多了。

今天写了个用java压缩的功能，可以实现对文件和目录的压缩。   
  
由于java.util.zip.ZipOutputStream有中文乱码问题，所以采用org.apache.tools.zip.ZipOutputStream。

以下是代码：

package net.szh.zip;
    
    import java.io.BufferedInputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.util.zip.CRC32;
    import java.util.zip.CheckedOutputStream;
    
    import org.apache.tools.zip.ZipEntry;
    import org.apache.tools.zip.ZipOutputStream;
    
    public class ZipCompressor {
    	static final int BUFFER = 8192;
    
    	private File zipFile;
    
    	public ZipCompressor(String pathName) {
    		zipFile = new File(pathName);
    	}
    
    	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);
    			String basedir = "";
    			compress(file, out, basedir);
    			out.close();
    		} catch (Exception e) {
    			throw new RuntimeException(e);
    		}
    	}
    
    	private void compress(File file, ZipOutputStream out, String basedir) {
    		/* 判断是目录还是文件 */
    		if (file.isDirectory()) {
    			System.out.println("压缩：" + basedir + file.getName());
    			this.compressDirectory(file, out, basedir);
    		} else {
    			System.out.println("压缩：" + basedir + file.getName());
    			this.compressFile(file, out, basedir);
    		}
    	}
    
    	/** 压缩一个目录 */
    	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++) {
    			/* 递归 */
    			compress(files[i], out, basedir + dir.getName() + "/");
    		}
    	}
    
    	/** 压缩一个文件 */
    	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);
    		}
    	}
    }

后来发现原来可以用ant中的org.apache.tools.ant.taskdefs.Zip来实现，更加简单。

package net.szh.zip;
    
    import java.io.File;
    
    import org.apache.tools.ant.Project;
    import org.apache.tools.ant.taskdefs.Zip;
    import org.apache.tools.ant.types.FileSet;
    
    public class ZipCompressorByAnt {
    
    	private File zipFile;
    
    	public ZipCompressorByAnt(String pathName) {
    		zipFile = new File(pathName);
    	}
    	
    	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夹 eg:zip.setIncludes("*.java");
    		//fileSet.setExcludes(...); 排除哪些文件或文件夹
    		zip.addFileset(fileSet);
    		
    		zip.execute();
    	}
    }

测试一下

package net.szh.zip;
    
    public class TestZip {
    	public static void main(String[] args) {
    		ZipCompressor zc = new  ZipCompressor("E:\\szhzip.zip");
    		zc.compress("E:\\test");
    		
    		ZipCompressorByAnt zca = new ZipCompressorByAnt("E:\\szhzipant.zip");
    		zca.compress("E:\\test");
    	}
    }