如何通过JSP页面调用servlet [英] How to call servlet through a JSP page
问题描述
我想通过JSP页面调用Servlet.什么叫方法?
I would like to call a Servlet through a JSP page. What is the method to call?
推荐答案
您可以为此使用<jsp:include>.
<jsp:include page="/servletURL" />
然而，通常情况恰恰相反.您调用servlet，该servlet继而转发到JSP以显示结果.创建一个Servlet，其功能类似于doGet()方法中的操作.
It's however usually the other way round. You call the servlet which in turn forwards to the JSP to display the results. Create a Servlet which does something like following in doGet() method.
request.setAttribute("result", "This is the result of the servlet call");
request.getRequestDispatcher("/WEB-INF/result.jsp").forward(request, response);
和/WEB-INF/result.jsp
<p>The result is ${result}</p>
现在通过与web.xml中的<url-pattern>相匹配的URL调用Servlet，例如 http://example.com/contextname/servletURL .
Now call the Servlet by the URL which matches its <url-pattern> in web.xml, e.g. http://example.com/contextname/servletURL.
如果您的实际问题是如何向Servlet提交表单?"那么您只需以HTML形式action指定servlet URL.
If your actual question is "How to submit a form to a servlet?" then you just have to specify the servlet URL in the HTML form action.
<form action="servletURL" method="post">
其doPost()方法将被调用.
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