首页 > 代码库 > servlet dispatcher .forward(request, response); 进入其它servlet【原】
servlet dispatcher .forward(request, response); 进入其它servlet【原】
dispatcher .forward(request, response); 进入其它servlet
假如我们的web.xml配置如下
<servlet> <servlet-name>index</servlet-name> <servlet-class>king.server.IndexServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>index</servlet-name> <url-pattern>/indexHtml</url-pattern> </servlet-mapping> <servlet> <servlet-name>allServlet</servlet-name> <servlet-class>king.server.HttpRequestServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>allServlet</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping>
IndexServlet代码如下
public class IndexServlet extends HttpServlet{ @Override public void doGet(HttpServletRequest request, HttpServletResponse response) { try { TraceTool.traceParent(); RequestDispatcher dispatcher = request.getRequestDispatcher("/index.html"); dispatcher .forward(request, response); } catch (Exception e) { e.printStackTrace(); } }}
此时执行完IndexServlet的dispatcher .forward(request, response);后相当于去请求了contextPath/index.html,
于是被<url-pattern>/*</url-pattern>的allServlet拦截下来.又进到了allServlet的get(xxx)方法中去了.
servlet dispatcher .forward(request, response); 进入其它servlet【原】
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