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[英]What's is the use of <security-constraint> in web.xml in Google app engine GWT Java
[英]Google App Engine (Java) - Redirection to jsp from web.xml
我在Google App Engine中进行重定向和Servlet时遇到问题。 我有一个index.jsp和list.jsp,但是无法获得预期的结果。
我在web.xml中有这个:
<filter-name>URIParserFilter</filter-name>
<filter-class>com.bbva.icaro2.web.filters.URIParserFilter</filter-class>
</filter>
<servlet>
<servlet-name>EntitiesAdminServlet</servlet-name>
<servlet-class>com.myproject.web.EntitiesAdminServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>ListServlet</servlet-name>
<servlet-class>com.myproject.web.ListServlet</servlet-class>
<jsp-files>/lists/lists.jsp</jsp-files>
</servlet>
<servlet-mapping>
<servlet-name>EntitiesAdminServlet</servlet-name>
<url-pattern>/admin/entities/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>ListServlet</servlet-name>
<url-pattern>/lists/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
当我访问http:// myproject / lists / mylist时 ,线程转到URIParserFilter:
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
String entityKind = null;
String id = null;
String pathInfo = ((HttpServletRequest)req).getPathInfo();
String pathString = (pathInfo == null || pathInfo.equals("/")) ? "" : pathInfo.substring(1);
String[] parts = pathString.split("/");
entityKind = parts[0].trim();
id = (parts.length > 1) ? parts[1].trim() : null;
req.setAttribute(Constants.REQ_ATTR_REQ_ENTITYKIND, entityKind); // entityKind = "mylist"
req.setAttribute(Constants.REQ_ATTR_REQ_ENTITYID, id);
chain.doFilter(req, resp);
}
然后通过ListServlet传递到list.jsp,如果没有http:// myproject / admin / entities / hello,它将起作用!
这些类完全相同...
我做错了什么?
谢谢,抱歉我的英语不好。
用URL模式编写唯一的<jsp-files>
。它将重定向到jsp文件。
<servlet>
<servlet-name>MyServlet</servlet-name>
<servlet-class>com.uks.MyServlet</servlet-class>
<jsp-files>/jsp/my.jsp</jsp-files>
</servlet>
<servlet-mapping>
<servlet-name>MyServlet</servlet-name>
<url-pattern>/MyServlet</url-pattern>
</servlet-mapping>
从servlet到jsp页面进行转发。 不要在web.xml中映射jsp。
因此,您需要在servlet中执行任何操作,然后:
String destination = "/jsp/my.jsp";
RequestDispatcher rd = getServletContext().getRequestDispatcher(destination);
rd.forward(request, response);
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