Getting Class from jar within a jar list Class from jar within a jar( 如何列出 jar 包中 jar 包里的类)

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如这样一个目录/Users/xxx/IdeaProjects/abc/web/target/web.jar!/BOOT-INF/lib/rest-0.0.1.jar!/com/tg/tiny /Users/xxx/IdeaProjects/abc/web/target/web.jar这个 jar 包下的文件目录可以这样得到

JarFile localJarFile = new JarFile(new File("/Users/xxx/IdeaProjects/abc/web/target/web.jar"));
Enumeration<JarEntry> entries = localJarFile.entries();
        while (entries.hasMoreElements()) {
            JarEntry jarEntry = entries.nextElement();
            System.out.println(jarEntry.getName());
        }

那么这个web.jar里的rest-0.0.1.jar下的文件目录如何得到？

3 replies • 2017-03-31 15:14:33 +08:00

leafin

Mar 31, 2017

用 JarURLConnection ，给你写了一段，已测试

public static void main(String[] args) throws Exception {
try {
String baseFile = "D:/admin.war";
JarFile jarFile = new JarFile(baseFile);
Enumeration<JarEntry> entries = jarFile.entries();
while (entries.hasMoreElements()) {
JarEntry jarEntry = entries.nextElement();
if(jarEntry.getName().endsWith(".jar")){
System.out.println("list jar file of " + jarEntry.getName());
URL url = new URL("jar:file:" + baseFile + "!/" + jarEntry.getName());
JarURLConnection urlConnection = (JarURLConnection) url.openConnection();
JarInputStream jarInputStream = new JarInputStream(urlConnection.getInputStream());
JarEntry entry;
int i = 0;
while((entry = jarInputStream.getNextJarEntry()) != null) {
if(entry.isDirectory()){
continue;
}
if(i++ >= 5){
System.out.println();
break;
}
System.out.println(entry.getName());
}
}
}
}catch (Exception e){
e.printStackTrace();
}
}

leafin

Mar 31, 2017

不会排版，抱歉了

twogoods

Mar 31, 2017

@leafin work ！感谢！