怎么进行压缩jar

本篇文章为大家展示了怎么进行压缩jar，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

场景

• 页面上传jar包

• 后台解压jar包

• 页面展示所有package

• 选择一个package

• 页面显示class和子package

• 选择class，进入class解析页面

• 选择package，显示class和子package

压缩成jar

package com.wuxiongwei.java.jar2;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;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 java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;/** * 非常好的工具类 
 * 压缩成jar. * @author * @version 1.0.0 */public class JarCompressor {    private static Log log = LogFactory.getLog(JarCompressor.class);    private static final int BUFFER = 8192;    private File fileName;    private String originalUrl;    public JarCompressor(String pathName) {        fileName = new File(pathName);    }    public void compress(String... pathName) {        ZipOutputStream out = null;        try {            FileOutputStream fileOutputStream = new FileOutputStream(fileName);            CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,                    new CRC32());            out = new ZipOutputStream(cos);            String basedir = "";            for (int i = 0; i < pathName.length; i++) {                compress(new File(pathName[i]), out, basedir);            }            out.close();        } catch (Exception e) {            throw new RuntimeException(e);        }    }    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(fileName);            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()) {            this.compressDirectory(file, out, basedir);        } else {            this.compressFile(file, out, basedir);        }    }    /**     *  压缩目录     * @param dir     * @param out     * @param basedir     */    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() + "/");        }    }    /**     * 压缩文件     * @param file     * @param out     * @param basedir     */    private void compressFile(File file, ZipOutputStream out, String basedir) {        if (!file.exists()) {            return;        }        try {            BufferedInputStream bis = new BufferedInputStream(                    new FileInputStream(file));            String filePath = (basedir + file.getName())                    .replaceAll(getOriginalUrl() + "/", "");            log.info("压缩文件：" + filePath);            ZipEntry entry = new ZipEntry(filePath);            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);        }    }    public static void main(String[] args) {        JarCompressor zc = new JarCompressor("/Users/mac/Documents/other/bw2/test.jar");        zc.compress("/Users/mac/Documents/other/bw2/test/");    }    public String getOriginalUrl() {        return originalUrl;    }    public void setOriginalUrl(String originalUrl) {        this.originalUrl = originalUrl;    }}

上述内容就是怎么进行压缩jar，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注行业资讯频道。