Question

这就是事情，

为了模仿grails为一个表单提交多个提交的方式，我实现了这个拦截器，以便在遇到如下的URL时： / whatever-url / $ {controllerName} / index它重定向到/ whatever-url / $ {controllerName} / $ {submitName}

我有两个问题，首先是使用get方法重定向，第二个我不保留jsp中原始表单的postData，任何人都知道如何在重定向请求中设置它？
这是拦截器类：



   public class ControllerIndexInterceptor extends HandlerInterceptorAdapter {

    private static String[] redirects = {"edit", "delete"};

        /**
         * {@inheritDoc}
         */
        @Override
        public boolean preHandle(HttpServletRequest request,
                HttpServletResponse response, Object handler) throws Exception {
            String param = null;
            for (String redirect : redirects) {
                if((param = request.getParameter(redirect)) != null){
                    response.sendRedirect(request.getContextPath()+request.getServletPath()+
transformURI(request.getPathInfo(), redirect, handler));
                    return false;
                }
            }
            return true;

        }

public class ControllerIndexInterceptor extends HandlerInterceptorAdapter { private static String[] redirects = {"edit", "delete"}; /** * {@inheritDoc} */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { String param = null; for (String redirect : redirects) { if((param = request.getParameter(redirect)) != null){ response.sendRedirect(request.getContextPath()+request.getServletPath()+ transformURI(request.getPathInfo(), redirect, handler)); return false; } } return true; }

答案：

   public class ControllerIndexInterceptor extends HandlerInterceptorAdapter {

    private static String[] redirects = {"edit", "delete"};

        /**
         * {@inheritDoc}
         */
        @Override
        public boolean preHandle(HttpServletRequest request,
                HttpServletResponse response, Object handler) throws Exception {
            String param = null;
            for (String redirect : redirects) {
                if((param = request.getParameter(redirect)) != null){
                    request.getRequestDispatcher(request.getServletPath()+
transformURI(request.getPathInfo(), redirect, handler)).forward(request,response);
                    return false;
                }
            }
            return true;

        }

Answer 1

IMO response.sendRedirect()会向浏览器发送重定向状态代码，最终会发出新请求，这是您获取GET请求的原因。这也是没有获得POST数据的原因（因为它是一个新的和不同的请求）。请改用request.getRequestDispatcher()。

在拦截器重定向请求中重新发送帖子数据

1 个答案: