【发布时间】：2018-12-02 11:33:50
【问题描述】：
我正在尝试覆盖 doGet 和 doPost 并尝试调用 doPost 但无法正常工作。下面是 JSP 和 Servlet 代码
<%@ page language="java" %>
<!DOCTYPE html>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<form method="post" action="FirstServlet">
<input type="text" name="Name" value="Enter">
<input type="button" name="submit" value="Submit"/>
</form>
</body>
</html>
Servlet 代码在下面并尝试调用 doPost 方法，但它没有被调用，也没有在控制台中打印消息。但是，当我尝试直接从 URL 访问 servlet 时，它的 doGet 方法被调用了
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class FirstServlet
*/
@WebServlet("/FirstServlet")
public class FirstServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public FirstServlet() {
super();
System.out.println(" Inside Constructor");
// TODO Auto-generated constructor stub
}
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
// TODO Auto-generated method stub
System.out.println(" Inside init");
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println(" Inside doGet");
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println(" Inside doPost");
doGet(request, response);
}
}
【问题讨论】：