I'm learning Servlet but stuck on this 404 a whole day after many times check. I'm using myelcipse to edit and deploy automatically. Here is my three files code, including:
1. An "addEmpPage" html for data entrance and form submit:
<!DOCTYPE html>
<html>
<head>
<title>addEmpPage</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body style="font-size:24px;">
<div>
<h1>Add Employer Page:</h1>
</div>
<div>
<form action="http://localhost:8080/AddEmpClass/addEmpUrl" method="post">
<fieldset>
<legend>Add New Employee</legend>
name: <input name="name"/><br>
salary: <input name="salary"/><br>
age: <input name="age"/><br>
<input type="submit" value="add"/>
</fieldset>
</form>
</div>
</body>
</html>
2. A web.xml for servlet mapping:
<?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">
<servlet>
<servlet-name>add</servlet-name>
<servlet-class>addemppackage.AddEmpClass</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>add</servlet-name>
<url-pattern>/addEmpUrl</url-pattern>
</servlet-mapping>
</web-app>
3. A java file for logic:
package addemppackage;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.ws.http.HTTPException;
public class AddEmpClass extends HttpServlet {
public void service(HttpServletRequest req, HttpServletResponse res)
throws HTTPException, IOException{
req.setCharacterEncoding("utf-8");
res.setContentType("text/html;charset=utf-8");
PrintWriter out=res.getWriter();
String name=req.getParameter("name");
double sal=Double.valueOf(req.getParameter("salary"));
int age=Integer.valueOf(req.getParameter("age"));
out.println("<h1>Employee Information</h1>");
out.println("<h2>name："+name+"</h2>");
out.println("<h2>salary："+sal+"</h2>");
out.println("<h2>age："+age+"</h2>");
out.close();
}
}
Here is the file structure:
[![file structure]](../../images/3813280883.webp)
1
I deploy and run the server, and after I fill the blanks and submit the data, the page jumps to the 404 error page: The requested resource is not available.
