这是当我尝试编译我的代码时看到的错误 - 我是否正在通过URL传递?我想从这个示例代码中学习,在浏览器中显示我的servlet。我想在浏览器中加载我的servlet,它给了我这个错误
HTTP Status 404 - /Lesson41/
type Status report
message /Lesson41/
description The requested resource is not available.
Apache Tomcat/8.0.22
我的servlet代码如下:
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 Lesson41
*/
@WebServlet("/Lesson41")
public class Lesson41 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 usersName = request.getParameter("YourName");
String theLang = request.getParameter("Language");
int firstNum = Integer.parseInt(request.getParameter("Firstnum"));
int secondNum = Integer.parseInt(request.getParameter("secondnum"));
int sumONum = firstNum + secondNum;
response.setContentType("text/html");
PrintWriter output = response.getWriter();
output.println("<html><body><h3>Hello " + usersName);
output.println("</h3><br />" + firstNum + " + " + secondNum);
output.println(" = " + sumONum + "<br />Speaks " + theLang + "</body></html>");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
这是我的XML:
<?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>HelloServers</display-name>
<servlet>
<servlet-name>Lesson41</servlet-name>
<servlet-class>HelloServelets-Lesson41</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Lesson41</servlet-name>
<url-pattern>http://localhost:8080/Lesson41/</url-pattern>
</servlet-mapping>
</web-app>
“错误”,而不是“时代” –
我不知道,但似乎这样的:通过'http://本地主机:8080/Lesson41 /'URL模式是错误的,心不是URL模式假设是什么像'/ Lesson41 /'? – Lrrr
我已经尝试过,仍然无法工作。 – KIM