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
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;
}
}
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