这是您的错误所在的行：
Requestdispatcher view = request.getRequestdispatcher('diceBoardPage.jsp');
根据getRequestDispatcherAPI，输入uri是相 对于当前servlet上下文的，因此，当您在以下位置执行servlet时
/dices/roll
…并执行“ diceBoardPage.jsp”的调度，实际上是调度到
/dices/diceBoardPage.jsp
将该模式映射到哪个servlet？根据您的部署描述符，每个以“ / dices /*”开头的URL都映射到DiceBoard。IE相同的servlet。这是导致您的StackOverflowError的无限循环。
如果JSP必须保留在dicesuri内，则必须限制映射DiceBoardservlet 的URL模式。如果需要，请不要犹豫添加几个值：
<servlet-mapping> <servlet-name>DiceBoard</servlet-name> <url-pattern>/dices/one</url-pattern> <url-pattern>/dices/two</url-pattern> <url-pattern>/dices/three</url-pattern></servlet-mapping>解决方法
在不断重复这些行之后，Tomcat给了我StackOverflowError，这DiceBoardDispatcher是我的HttpServlet所在的地方，在第34行中，我正在调用requestDispatcher#forward()。
nl.rickhurkens.rollDice.web.diceBoard.DiceBoardDispatcher.doGet(DiceBoardDispatcher.java:34)javax.servlet.http.HttpServlet.service(HttpServlet.java:634)javax.servlet.http.HttpServlet.service(HttpServlet.java:741)org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)nl.rickhurkens.rollDice.web.diceBoard.DiceBoardDispatcher.doGet(DiceBoardDispatcher.java:34)javax.servlet.http.HttpServlet.service(HttpServlet.java:634)javax.servlet.http.HttpServlet.service(HttpServlet.java:741)org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
我想这与我的部署有关，这是我的web.xml的相关部分：
<servlet-mapping> <servlet-name>DiceBoard</servlet-name> <url-pattern>/dices/*</url-pattern> </servlet-mapping> <filter-mapping> <filter-name>RollDiceFilter</filter-name> <url-pattern>/dices/roll</url-pattern> </filter-mapping> <filter-mapping> <filter-name>SetSettingsFilter</filter-name> <url-pattern>/dices/setup</url-pattern> </filter-mapping>
我想做的是在同一页面上同时执行2个操作。我以为我会这样设置。每个动作都要经过自己的动作，Filter并且都以Servlet分派到的结尾JSP。
我的网址格式映射曾经是to/diceBoard/*，它是网络应用中某个文件夹。从那里改变到/dices/*解决问题url/dices。现在，我可以正常访问该页面了，但是当url/dices/roll我进入无限循环时（无论是POST还是GET）。
编辑：我的servlet代码：
public class DiceBoardDispatcher extends HttpServlet { protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {HttpSession session = request.getSession();RequestDispatcher view = request.getRequestDispatcher('diceBoardPage.jsp');view.forward(request,response); } protected void doPost(HttpServletRequest request,IOException {RequestDispatcher view = request.getRequestDispatcher('diceBoardPage.jsp');view.forward(request,response); }}
和RollDiceFilter：
public class RollDiceFilter implements Filter { public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException,ServletException {HttpServletRequest req = (HttpServletRequest)request;HttpServletResponse res = (HttpServletResponse)response;HttpSession session = req.getSession();DiceBoard diceBoard = (DiceBoard)session.getAttribute('diceBoard');String[] lockedValues = req.getParameterValues('lock');diceBoard.unlockAllDice();if (lockedValues != null) { for (String value : lockedValues) {if (value != null) { try {diceBoard.lockDice(Integer.parseInt(value)); } catch (DiceNotInCollectionException e) {// TODO: redirect to error page.e.printStackTrace(); }} }}diceBoard.getCup().roll();chain.doFilter(req,res); } public void init(FilterConfig fConfig) throws ServletException { } public void destroy() { }}
