getRequestDispatcher

最新推荐文章于 2023-10-17 09:09:35 发布

翻译最新推荐文章于 2023-10-17 09:09:35 发布 · 953 阅读

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本文深入探讨了HttpServletRequest对象的getRequestDispatcher方法，解释了如何使用此方法将请求转发到资源或包含资源，以及方法的工作原理和参数使用。

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getRequestDispatcher

public RequestDispatcher getRequestDispatcher(String path)

Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path. A RequestDispatcher object can be used to forward a request to the resource or to include the resource in a response. The resource can be dynamic or static.

The pathname specified may be relative, although it cannot extend outside the current servlet context. If the path begins with a "/" it is interpreted as relative to the current context root. This method returns null if the servlet container cannot return a RequestDispatcher.

The difference between this method and ServletContext.getRequestDispatcher(java.lang.String) is that this method can take a relative path.

Parameters:

path - a String specifying the pathname to the resource. If it is relative, it must be relative against the current servlet.

Returns:

a RequestDispatcher object that acts as a wrapper for the resource at the specified path, or null if the servlet container cannot return a RequestDispatcher