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A quick developing framewort for internet company
/**
* Copyright (C) 2016 - 2030 youtongluan.
*
* 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 org.yx.common.scaner;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Predicate;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.yx.util.IOUtil;
public class JarFileUtil {
public static final String URL_PROTOCOL_JAR = "jar";
public static final String URL_PROTOCOL_ZIP = "zip";
public static final String JAR_URL_SEPARATOR = "!/";
public static boolean isJarURL(URL url) {
String protocol = url.getProtocol();
return URL_PROTOCOL_JAR.equals(protocol) || URL_PROTOCOL_ZIP.equals(protocol);
}
public static Map exactResourcesInJar(URL url, Predicate tester) throws IOException {
Map map = new HashMap<>();
JarFile jarFile = null;
try {
String prefix = "";
String urlPath = url.getPath();
int separatorIndex = urlPath.lastIndexOf(JAR_URL_SEPARATOR);
if (separatorIndex != -1 && separatorIndex + JAR_URL_SEPARATOR.length() < urlPath.length()) {
prefix = urlPath.substring(separatorIndex + JAR_URL_SEPARATOR.length());
if (!prefix.endsWith("/")) {
prefix += "/";
}
}
jarFile = ((JarURLConnection) url.openConnection()).getJarFile();
Enumeration jarEntryEnum = jarFile.entries();
while (jarEntryEnum.hasMoreElements()) {
JarEntry entry = jarEntryEnum.nextElement();
String entityName = entry.getName();
if (entry.isDirectory() || !entityName.startsWith(prefix)) {
continue;
}
if (tester != null && !tester.test(entityName)) {
continue;
}
byte[] bs = IOUtil.readAllBytes(jarFile.getInputStream(entry), true);
map.put(entityName, bs);
}
} finally {
if (jarFile != null) {
jarFile.close();
}
}
return map;
}
}
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