在org.apache.catalina.core.JreMemoryLeakPreventionListener中急切调用URLConnection的setDefaultUseCaches（fals

在org.apache.catalina.core.JreMemoryLeakPreventionListener中急切调用URLConnection的setDefaultUseCaches（fals

我自己找到答案。如果您认为我错了，任何人都可以纠正我。在中

sun.net.www.protocol.jar.JarURLConnection

。我认为这是的默认实现

java.net.JarURLConnection

。下面有一段代码。

如果将cache设置为true，则它将不会关闭JarFile的连接。这意味着它已被锁定。

class JarURLInputStream extends java.io.FilterInputStream {        JarURLInputStream (InputStream src) { super (src);        }        public void close () throws IOException { try {     super.close(); } finally {     if (!getUseCaches()) {         jarFile.close(); //will not close     } }        }    }    public void connect() throws IOException {        if (!connected) {  jarFile = factory.get(getJarFileURL(), getUseCaches());  if (getUseCaches()) {     jarFileURLConnection = factory.getConnection(jarFile); } if ((entryName != null)) {     jarEntry = (JarEntry)jarFile.getEntry(entryName);     if (jarEntry == null) {         try {  if (!getUseCaches()) {      jarFile.close();  //will not close  }         } catch (Exception e) {         }         throw new FileNotFoundException("JAR entry " + entryName +        " not found in " +        jarFile.getName());     } } connected = true;        }    }