java我如何在下面的代码中解决这个>错误HTTP Status 404

3 月，1 周 Questions & Answers 354

所以我试图用Servlet在网上显示信息，我被卡住了，我尝试过搜索和研究，但徒劳，我没有找到任何帮助。我想知道这可能是服务器的问题吗？当我试图用Java中的dopost方法运行html时，它总是给我这个错误。否则，当我在服务器上运行Java类时，它会显示为没有任何问题，当我在web上运行html时，它也会显示为没有任何问题，但CANNOT获取方法。如果您有任何帮助，我们将不胜感激。我的代码如下/我的.JSP文件也出现了同样的错误。这只是我决定使用的示例，以解决我的主代码问题

我的Java代码

package helloServelets;

import java.io.IOException;
import java.io.PrintWriter;

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 LearningServelets
 */
@WebServlet("/LearningServelets")
public class LearningServelets extends HttpServlet {


    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    String yourname = request.getParameter("YourName");
    String enter = request.getParameter("Enter");
    String school = request.getParameter("SchoolName");
    String work = request.getParameter("Work");
    String Home = request.getParameter("home");


        response.setContentType("text/html");

        PrintWriter output = response.getWriter();

        output.println("<html><body><h3>Hello " + yourname);

        output.println("</h3><br />" + enter + " + " + school+work);
        output.println(Home + "<br /> "  + "</body></html>");

    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }

}

我的HTML代码如下

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form method="post" action="LearningServelets">

What is your YourName?
<input name = "Yourname"> 
<p>
What is your Gender

<input name ="Enter">
</p>
<p>
Where did you go to school?
<input name = "SchoolName">
</p>

<p>
Where do you Work?
<input name = "Work">
</p>

<p>
Where do you live?
<input name = "home">
</p>
<input type ="submit">
</form>

</body>
</html>

我的XML文件如下

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>ServeletsLearning</display-name>
      <servlet> 
     <servlet-name>LearningServelets</servlet-name>
     <servlet-class>helloServelets.LearningServelets</servlet-class>
     </servlet>

</web-app>

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <form method="post" action="LearningServlet"> What is your age?<input name = "age"><br> What is your Gender?<input name ="gender"><br> Where did you go to school?<input name = "schoolname"><br> Where do you Work?<input name = "work"><br> Where do you live?<input name = "home"><br> <input type ="submit"> </form> </body>

import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/LearningServlet") public class LearningServlet extends HttpServlet { private static final long serialVersionUID = 1L; public LearningServlet() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String age=request.getParameter("age"); String gender=request.getParameter("gender"); String schoolname=request.getParameter("schoolName"); String work=request.getParameter("work"); String home=request.getParameter("home"); response.setContentType(getServletContext().getMimeType("text/html")); PrintWriter pw=response.getWriter(); pw.write("<html><body>"); pw.write("Age :"+age+"<br>"); pw.write("Gender :"+gender+"<br>"); pw.write("School Name :"+schoolname+"<br>"); pw.write("Work :"+work+"<br>"); pw.write("Home :"+home+"<br>"); pw.write("</body></html>"); } }

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <display-name>helloservlet</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list> </web-app>

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java我如何在下面的代码中解决这个>错误HTTP Status 404

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