jsp可以写servlet类吗 jsp页面当servlet
我做一个二次开发，我在想jsp不是能嵌套java代码吗,所以想在jsp页面写servlet类 但是不知道怎么调用，
（不要告诉我写在java里面，因为不行我才写到jsp页面）
在web.xml配置 通过
<servlet>
<servlet-name>testServlet</servlet-name>
<jsp-file>/jsp/test.jsp</jsp-file>
</servlet>
确实能访问到test.jsp 但是不会不调用doGet（） doPost方法
--以下是test.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.esoon.cisiss.common.BaseServlet" %>
<%@ page import="java.io.IOException" %>
<%@ page import="javax.servlet.ServletException" %>
<%@ page import="javax.servlet.http.HttpServletRequest" %>
<%@ page import="javax.servlet.http.HttpServletResponse" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<script type="text/javascript">
alert("");
</script>
<%
class testServlet extends BaseServlet{
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.print("----------1-------");
System.out.print("--------2---------");
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
}
%>
一个jsp写doPost干吗，想做什么直接做，想接值直接写request.getParameter
public final class login_jsp extends org.apache.jasper.runtime.HttpJspBase implements org.apache.jasper.runtime.JspSourceDependent { private static final JspFactory _jspxFactory = JspFactory.getDefaultFactory(); private static java.util.List _jspx_dependants; private javax.el.ExpressionFactory _el_expressionfactory; private org.apache.AnnotationProcessor _jsp_annotationprocessor; public Object getDependants() { return _jspx_dependants; } public void _jspInit() { _el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory(); _jsp_annotationprocessor = (org.apache.AnnotationProcessor) getServletConfig().getServletContext().getAttribute(org.apache.AnnotationProcessor.class.getName()); } public void _jspDestroy() { } public void _jspService(HttpServletRequest request, HttpServletResponse response) throws java.io.IOException, ServletException { PageContext pageContext = null; HttpSession session = null; ServletContext application = null; ServletConfig config = null; JspWriter out = null; Object page = this; JspWriter _jspx_out = null; PageContext _jspx_page_context = null; try { response.setContentType("text/html;charset=UTF-8"); pageContext = _jspxFactory.getPageContext(this, request, response, null, true, 8192, true); _jspx_page_context = pageContext; application = pageContext.getServletContext(); config = pageContext.getServletConfig(); session = pageContext.getSession(); out = pageContext.getOut(); _jspx_out = out; out.write("\r\n"); out.write("\r\n"); out.write("\r\n"); String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; basePath = basePath +""; out.write("\r\n"); out.write("<html>\r\n"); out.write("\t<head>\r\n"); out.write("\t\t<meta http-equiv=\"pragma\" content=\"no-cache\">\r\n"); out.write("\t\t<meta http-equiv=\"cache-control\" content=\"no-cache\">\r\n"); out.write("\t\t<title>欢迎访问");
找一个jsp编译的java代码看一下，调用jsp页面后调用的是
public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws java.io.IOException, ServletException {
这个方法，这个方法的方法体就是你卸载jsp页面内部的代码。
所以dopost doget 的方法体直接写在jsp页面里就可以了