其中"classpath *"是在Spring MVC Project中声明的? [英] Where "classpath*" is declared in Spring MVC Project?

问题描述

我对此感到很好奇.

此"classpath *"声明在哪里?

Where is this "classpath*" declaration?

通常在web.xml中描述以下内容.

Follow is normaly descripted in web.xml.

  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>
                classpath*:egovframework/springmvc/context-*.xml
            </param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

我认为该框架首先阅读了web.xml.但是，如何知道这个关键字"classpath *:"呢?

I thought this framwork read web.xml first. However how can it knows this keyword "classpath*:" ?

提前感谢您:D

推荐答案

我相信

I believe spring docs describe class path resources well:

ClassPathResource

此类代表一种资源，应从类路径.这将使用给定的线程上下文类加载器类加载器，或用于加载资源的给定类.

This class represents a resource which should be obtained from the classpath. This uses either the thread context class loader, a given class loader, or a given class for loading resources.

如果此资源实现支持将解析为java.io.File类路径资源位于文件系统中，但不适用于驻留在jar中且尚未扩展的classpath资源(通过servlet引擎或任何环境)文件系统.为了解决这个问题，各种资源实现始终支持将解析作为java.net.URL.

This Resource implementation supports resolution as java.io.File if the class path resource resides in the file system, but not for classpath resources which reside in a jar and have not been expanded (by the servlet engine, or whatever the environment is) to the filesystem. To address this the various Resource implementations always support resolution as a java.net.URL.

由Java代码使用以下代码显式创建ClassPathResourceClassPathResource构造函数，但通常会隐式创建当您调用带有String参数的API方法时，该参数是旨在代表一条道路.对于后一种情况，使用JavaBeansPropertyEditor将识别特殊前缀classpath:字符串路径，并在这种情况下创建ClassPathResource

A ClassPathResource is created by Java code explicitly using the ClassPathResource constructor, but will often be created implicitly when you call an API method which takes a String argument which is meant to represent a path. For the latter case, a JavaBeans PropertyEditor will recognize the special prefix classpath:on the string path, and create a ClassPathResource in that case

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