scouter.boot.JarUtil Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
* @https://github.com/scouter-project/scouter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package scouter.boot;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
public class JarUtil {
public static File getThisJarFile() {
String path = "";
ClassLoader cl = JarUtil.class.getClassLoader();
if (cl == null) {
path = ""
+ ClassLoader.getSystemClassLoader().getResource(Boot.class.getName().replace('.', '/') + ".class");
} else {
path = "" + cl.getResource(JarUtil.class.getName().replace('.', '/') + ".class");
}
path = path.substring("jar:file:/".length(), path.indexOf("!"));
if (path.indexOf(':') > 0)
return new File(path);
else
return new File("/" + path);
}
public static void unJar(File jarFile, File toDir) throws IOException {
if (jarFile == null)
return;
JarFile jar = new JarFile(jarFile);
try {
Enumeration entries = jar.entries();
while (entries.hasMoreElements()) {
JarEntry entry = (JarEntry) entries.nextElement();
if (!entry.isDirectory() && isOk(entry.getName())) {
InputStream in = jar.getInputStream(entry);
try {
File file = new File(toDir, entry.getName());
file.getParentFile().mkdirs();
OutputStream out = new FileOutputStream(file);
try {
byte[] buf = new byte[8192];
int n = in.read(buf);
while (n >= 0) {
out.write(buf, 0, n);
n = in.read(buf);
}
} finally {
out.close();
}
} finally {
in.close();
}
}
}
} finally {
jar.close();
}
}
private static boolean isOk(String name) {
if (name.startsWith("META-INF"))
return false;
if (name.startsWith("scouter/boot"))
return false;
if (name.endsWith(".class"))
return false;
return true;
}
}