class SecurityClassLoad

class SecurityClassLoad

package org.apache.catalina.startup;  /** * Static class used to preload java classes when using the * Java SecurityManager so that the defineClassInPackage * RuntimePermission does not trigger an AccessControlException. * * @author Glenn L. Nielsen * @version $Revision: 1.1 $ $Date: 2001/12/30 01:58:20 $ */   /** * 该类只有一个静态方法，其作用仅仅相当于一个函数 * 该静态方法负责载入一些指定的类 * package org.apache.catalina.core * package org.apache.catalina.connector * package org.apache.catalina.loader * package org.apache.catalina.session * package org.apache.catalina.util * 这些包都在$CATALINA_HOME/server/catalina.jar文件中 * （由此看来，该静态方法的合法参数仅为catalinaLoader？） */  public final class SecurityClassLoad { static void securityClassLoad(ClassLoader loader) throws Exception { if( System.getSecurityManager() == null ) return; String basePackage = "org.apache.catalina."; loader.loadClass (basePackage + "core.ApplicationContext$PrivilegedGetRequestDispatcher"); loader.loadClass (basePackage + "core.ApplicationContext$PrivilegedGetResource"); loader.loadClass (basePackage + "core.ApplicationContext$PrivilegedGetResourcePaths"); loader.loadClass (basePackage + "core.ApplicationContext$PrivilegedLogMessage"); loader.loadClass (basePackage + "core.ApplicationContext$PrivilegedLogException"); loader.loadClass (basePackage + "core.ApplicationContext$PrivilegedLogThrowable"); loader.loadClass (basePackage + "core.ApplicationDispatcher$PrivilegedForward"); loader.loadClass (basePackage + "core.ApplicationDispatcher$PrivilegedInclude"); loader.loadClass (basePackage + "core.ContainerBase$PrivilegedAddChild"); loader.loadClass (basePackage + "connector.HttpRequestBase$PrivilegedGetSession"); loader.loadClass (basePackage + "connector.HttpResponseBase$PrivilegedFlushBuffer"); loader.loadClass (basePackage + "loader.WebappClassLoader$PrivilegedFindResource"); loader.loadClass (basePackage + "session.StandardSession"); loader.loadClass (basePackage + "util.CookieTools"); loader.loadClass (basePackage + "util.URL"); loader.loadClass(basePackage + "util.Enumerator"); loader.loadClass("javax.servlet.http.Cookie"); } }