org.apache.jasper.servlet
类 JasperLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              org.apache.jasper.servlet.JasperLoader

public class JasperLoader
extends URLClassLoader

Class loader for loading servlet class files (corresponding to JSP files) and tag handler class files (corresponding to tag files).

作者：

Anil K. Vijendran, Harish Prabandham, Jean-Francois Arcand, Kin-man Chung

构造方法摘要

JasperLoader(URL[] urls, ClassLoader parent, PermissionCollection permissionCollection, CodeSource codeSource, Map<String,byte[]> bytecodes)

方法摘要

Class	findClass(String className)
PermissionCollection	getPermissions(CodeSource codeSource) Get the Permissions for a CodeSource.
Class	loadClass(String name) Load the class with the specified name.
Class	loadClass(String name, boolean resolve) Load the class with the specified name, searching using the following algorithm until it finds and returns the class.

从类 java.net.URLClassLoader 继承的方法

addURL, definePackage, findResource, findResources, getURLs, newInstance, newInstance

从类 java.security.SecureClassLoader 继承的方法

defineClass, defineClass

从类 java.lang.ClassLoader 继承的方法

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造方法详细信息

JasperLoader

public JasperLoader(URL[] urls,
                    ClassLoader parent,
                    PermissionCollection permissionCollection,
                    CodeSource codeSource,
                    Map<String,byte[]> bytecodes)

方法详细信息

loadClass

public Class loadClass(String name)
                throws ClassNotFoundException

Load the class with the specified name. This method searches for classes in the same manner as loadClass(String, boolean) with false as the second argument.

覆盖：

类 ClassLoader 中的 loadClass

参数：

name - Name of the class to be loaded

抛出：

ClassNotFoundException - if the class was not found

loadClass

public Class loadClass(String name,
                       boolean resolve)
                throws ClassNotFoundException

Load the class with the specified name, searching using the following algorithm until it finds and returns the class. If the class cannot be found, returns ClassNotFoundException.

• Call findLoadedClass(String) to check if the class has already been loaded. If it has, the same Class object is returned.
• If the delegate property is set to true, call the loadClass() method of the parent class loader, if any.
• Call findClass() to find this class in our locally defined repositories.
• Call the loadClass() method of our parent class loader, if any.

If the class was found using the above steps, and the resolve flag is true, this method will then call resolveClass(Class) on the resulting Class object.

覆盖：

类 ClassLoader 中的 loadClass

参数：

name - Name of the class to be loaded

resolve - If true then resolve the class

抛出：

ClassNotFoundException - if the class was not found

findClass

public Class findClass(String className)
                throws ClassNotFoundException

覆盖：

类 URLClassLoader 中的 findClass

抛出：

ClassNotFoundException

getPermissions

public final PermissionCollection getPermissions(CodeSource codeSource)

Get the Permissions for a CodeSource. Since this ClassLoader is only used for a JSP page in a web application context, we just return our preset PermissionCollection for the web app context.

覆盖：

类 URLClassLoader 中的 getPermissions

参数：

codeSource - Code source where the code was loaded from

返回：

PermissionCollection for CodeSource