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 <br>
 * 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;
    }

}