未找到HTTP状态404 - Servlet

Question

我在Eclipse中有一个项目，试图从web浏览器调用一个servlet。这张图片显示了我的项目结构。虽然我在注释中设置了url，但仍然找不到资源。

这是我的代码：

package java.enablingKeyWordSearch;

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(asyncSupported = false, name = "HelloServlet", urlPatterns = {"/hello"})
public class TestServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        out.write("<h2>Hello Servlet One </h2>");
        out.close();
    }
}

​

​

我尝试使用以下方法调用servlet：http://localhost:8080/MultiKeywordSearch/hello http://localhost:8080/MultiKeywordSearch/src/java/enablingKeyWordSearch/hello

..。诸若此类。然而，我得到一个HTTP状态404错误。

这是我的web.xml文件的内容：

<?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>MultiKeywordSearch</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

我正在使用ApacheTomcatv8.0，如果这有区别的话。

更新:在新屏幕截图中显示源代码清单；删除java命名空间

​

编辑2.0 web.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>MultiKeywordSearch</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
   <servlet>
        <servlet-name>HelloServlet</servlet-name>
        <servlet-class>enablingKeyWordSearch.TestServlet</servlet-class>
    </servlet>

<servlet-mapping>
    <servlet-name>HelloServlet</servlet-name>
    <url-pattern>/multiKeywordSearch</url-pattern>
</servlet-mapping>
</web-app>

enablingKeyWordSearch.TestServlet.java文件：

package enablingKeyWordSearch;

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

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//@WebServlet(asyncSupported = false, name = "HelloServlet", urlPatterns = {"/hello"})
@WebServlet(name = "HelloServlet", urlPatterns = {"/multiKeywordSearch"})
@MultipartConfig
public class TestServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        out.write("<h2>Hello Servlet One </h2>");
        out.close();
    }
}

不幸的是，仍然有404错误。

Answer 1

@WebServlet("/multiKeywordSearch")

@MultipartConfig


and then try this.
http://localhost:8080/MultiKeyewordSearch/multiKeywordSearch

Answer 2

尝试更新您的web.xml

 <servlet>
    <servlet-name>helloServlet</servlet-name>
    <servlet-class>java.enablingKeyWordSearch.TestServlet</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>helloServlet</servlet-name>
    <url-pattern>/hello</url-pattern>
</servlet-mapping>