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POERROR 404 encountered when attempting to call a servlet
 

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  1. POERROR 404 encountered when attempting to call a servlet
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    <p>i'm attempting to use apache tomcat 7.0 tomcat7 to access java servlets.</p> <p>I have created a folder to hold all my webapp files under the ROOT folder in webapps. The file structure is like this. </p> <ul> <li>Tomcat 7.0/webapps/myWebApp <ul> <li><strong>HelloHome.html</strong></li> <li>WEB-INF <ul> <li><strong>web.xml</strong></li> <li>classes <ul> <li>com <ul> <li>training <ul> <li>HelloServlet.java</li> <li><strong>HelloServlet.class</strong></li> </ul></li> </ul></li> </ul></li> </ul></li> </ul></li> </ul> <p>to call the servlet this web.xml code was used:</p> <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1"?&gt; &lt;web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"&gt; &lt;!-- To save as "hello\WEB-INF\web.xml" --&gt; &lt;servlet&gt; &lt;servlet-name&gt;HelloWorld&lt;/servlet-name&gt; &lt;servlet-class&gt;com.training.HelloServlet&lt;/servlet-class&gt; &lt;/servlet&gt; &lt;!-- Note: All &lt;servlet&gt; elements MUST be grouped together and placed IN FRONT of the &lt;servlet-mapping&gt; elements --&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;HelloWorld&lt;/servlet-name&gt; &lt;url-pattern&gt;/sayhello&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;/web-app&gt; </code></pre> <p>the actual java code (compiled to generate a class file under the classes folder):</p> <pre><code>//To save as "&lt;TOMCAT_HOME&gt;\webapps\hello\WEB-INF\classes\HelloServlet.java" package com.training; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class HelloServlet extends HttpServlet { @Override public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { // Set the response MIME type of the response message response.setContentType("text/html"); // Allocate a output writer to write the response message into the network socket PrintWriter out = response.getWriter(); // Write the response message, in an HTML page try { out.println("&lt;html&gt;"); out.println("&lt;head&gt;&lt;title&gt;Hello, World&lt;/title&gt;&lt;/head&gt;"); out.println("&lt;body&gt;"); out.println("&lt;h1&gt;Hello, world!&lt;/h1&gt;"); // says Hello // Echo client's request information out.println("&lt;p&gt;Request URI: " + request.getRequestURI() + "&lt;/p&gt;"); out.println("&lt;p&gt;Protocol: " + request.getProtocol() + "&lt;/p&gt;"); out.println("&lt;p&gt;PathInfo: " + request.getPathInfo() + "&lt;/p&gt;"); out.println("&lt;p&gt;Remote Address: " + request.getRemoteAddr() + "&lt;/p&gt;"); // Generate a random number upon each request out.println("&lt;p&gt;A Random Number: &lt;strong&gt;" + Math.random() + "&lt;/strong&gt;&lt;/p&gt;"); out.println("&lt;/body&gt;&lt;/html&gt;"); } finally { out.close(); // Always close the output writer } } } </code></pre> <p>i then hit: <strong>http://localhost:8080/myWebApp/sayhello</strong><br> and get a 404 error. any ideas as to what i am doing wrong?</p>
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    1. USuser582485
    1. USuser582485
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    1. COYour servlet must not be in the default package. Put it in a package, update your web.xml with the new package info.
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      1. USDave Newton
    2. COplaced my class file in a package. classes -> com -> training -> HelloServlet.class. Also updated the web.xml file's <servlet-class> tag to <servlet-class>com.training.HelloServlet</servlet-class>. still 404 error.
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    3. COThe directory structure is completely unclear in the question: please fix it so it's legible by making it monospaced and indenting properly.
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      1. USDave Newton
 

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