使用Servlet类将调用的JSP重定向到其自身 [英] Redirecting a calling JSP to itself using Servlet Class

问题描述

我试图借助Java servlet类将JSP请求返回到调用页面. 这意味着，在JSP页面上添加注释后，在将请求对象发送到servlet之后，注释也会重新出现在页面上. 这是jsp形式:

I am trying to return a JSP request back to the calling Page with the help of a Java servlet class. This means that after adding a comment on a JSP page, the comment reappears on the page as well after sending the request object to the servlet. This is the jsp form:

 <form action="/WebAppOpe/UploadComments" method="post">
                        <textarea name="comment" placeholder="Comment" column="10"></textarea>
                        <input type="submit" value="Post Comment" class="btn-login" name="btn_post" />
                        <input type ="hidden" name="carIdComment" value="${car.carId}" />
 </form>

这是UploadComments URI的servlet代码，用于将请求发送回源.

And this is the servlet code of the UploadComments URI for sending the request back to the source.

        RequestDispatcher rd = request.getRequestDispatcher("model.jsp?" + request.getParameter("carIdComment"));
        rd.forward(request, response);
        response.sendRedirect("model.jsp?"+  request.getParameter("carIdComment"));

推荐答案

由于您只想刷新当前页面，因此ajax是您更好的选择.

Since you just want to refresh the current page,ajax is a better choice for you.

对于您当前的设计，forward和redirect都可以，但是需要注意一些事项:

For you current design,both forward and redirect are okay,but something need to pay attention:

1. 如果使用redirect，则可以通过url设置参数

1. if you use redirect,you can set parameters via the url

，您需要查询退出注释，这意味着您可以redirect到新的url并查询数据，或者查询forward之前的数据.

after forward or redirect,you need to query the exits comments,which means that you had can either redirect to a new url and query data, or query the data before forward.

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