在Tomcat eclipse上部署简单的Servlet
我正在关注 Head First Java。
我按照他们的指示创建了一个简单的 servlet，但他们没有写如何部署它。
我正在尝试将它部署在 Tomcat 7 上，并且我已经通过 eclipse 设置了它。
但是我收到了 404 页面错误。
我创建了一个 web.xml 我还将类文件放置在 WEB-INF/classes 中。
这是代码。
package org.code;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class KathyServlet extends HttpServlet {
public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out;
String title = "PhraseOMatic has generated the following phrase.";
response.setContentType("text/html");
out = response.getWriter();
out.println("<HTML><HEAD><TITLE>");
out.println("PhraseOmatic");
out.println("</TITLE></HEAD><BODY>");
out.println("<H1>" + title + "</H1>");
out.println("<P>" + PhraseOMatic2.makePhrase());
out.println("<P><a href=\"KathyServlet\">make another phrase</a></p>");
out.println("</BODY></HTML>");
out.close();
}
}
其他java代码文件：
package org.code;
public class PhraseOMatic2 {
public static String makePhrase() {
// make three sets of words to choose from
String[] wordListOne = {"24/7","multi-Tier","30,000 foot","B-to-B","win-win","front- end", "web-based","pervasive", "smart", "six-sigma","critical-path", "dynamic"};
String[] wordListTwo = {"empowered", "sticky", "valued-added", "oriented", "centric", "distributed", "clustered", "branded","outside-the-box", "positioned", "networked", "focused", "leveraged", "aligned", "targeted", "shared", "cooperative", "accelerated"};
String[] wordListThree = {"process", "tipping point", "solution", "architecture", "core competency", "strategy", "mindshare", "portal", "space", "vision", "paradigm", "mission"};
// find out how many words are in each list
int oneLength = wordListOne.length;
int twoLength = wordListTwo.length;
int threeLength = wordListThree.length;
// generate three random numbers, to pull random words from each list
int rand1 = (int) (Math.random() * oneLength);
int rand2 = (int) (Math.random() * twoLength);
int rand3 = (int) (Math.random() * threeLength);
// now build a phrase
String phrase = wordListOne[rand1] + " " + wordListTwo[rand2] + " " + wordListThree[rand3];
// now return it
return ("What we need is a " + phrase);
}
}
web.xml：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>HFJse</display-name>
<servlet>
<servlet-name>kathyServlet</servlet-name>
<servlet-class>org.yasin.KathyServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>KathyServlet</servlet-name>
<url-pattern>/snoop/*</url-pattern>
</servlet-mapping>
</web-app>
I'm following Head First Java.
I created a simple servlet as they instructed but they did not write how to deploy it.
I'm trying to deploy it on Tomcat 7 and i have set it up via eclipse.
However im getting a 404 page error.
i created a web.xml i also placed the class files in WEB-INF/classes.
Here is the code.
package org.code;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class KathyServlet extends HttpServlet {
public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out;
String title = "PhraseOMatic has generated the following phrase.";
response.setContentType("text/html");
out = response.getWriter();
out.println("<HTML><HEAD><TITLE>");
out.println("PhraseOmatic");
out.println("</TITLE></HEAD><BODY>");
out.println("<H1>" + title + "</H1>");
out.println("<P>" + PhraseOMatic2.makePhrase());
out.println("<P><a href=\"KathyServlet\">make another phrase</a></p>");
out.println("</BODY></HTML>");
out.close();
}
}
other java code file:
package org.code;
public class PhraseOMatic2 {
public static String makePhrase() {
// make three sets of words to choose from
String[] wordListOne = {"24/7","multi-Tier","30,000 foot","B-to-B","win-win","front- end", "web-based","pervasive", "smart", "six-sigma","critical-path", "dynamic"};
String[] wordListTwo = {"empowered", "sticky", "valued-added", "oriented", "centric", "distributed", "clustered", "branded","outside-the-box", "positioned", "networked", "focused", "leveraged", "aligned", "targeted", "shared", "cooperative", "accelerated"};
String[] wordListThree = {"process", "tipping point", "solution", "architecture", "core competency", "strategy", "mindshare", "portal", "space", "vision", "paradigm", "mission"};
// find out how many words are in each list
int oneLength = wordListOne.length;
int twoLength = wordListTwo.length;
int threeLength = wordListThree.length;
// generate three random numbers, to pull random words from each list
int rand1 = (int) (Math.random() * oneLength);
int rand2 = (int) (Math.random() * twoLength);
int rand3 = (int) (Math.random() * threeLength);
// now build a phrase
String phrase = wordListOne[rand1] + " " + wordListTwo[rand2] + " " + wordListThree[rand3];
// now return it
return ("What we need is a " + phrase);
}
}
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>HFJse</display-name>
<servlet>
<servlet-name>kathyServlet</servlet-name>
<servlet-class>org.yasin.KathyServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>KathyServlet</servlet-name>
<url-pattern>/snoop/*</url-pattern>
</servlet-mapping>
</web-app>
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
我们的servlet类位于
org.code包中，但您在web.xml中设置的类名是org.yasin.KathyServlet。此外，您在 web.xml 中为 servlet 指定了名称
kathyServlet，但您的映射使用名称KathyServlet。 Servlet 名称区分大小写。our servlet calss is in the package
org.code, but the class name you set in the web.xml isorg.yasin.KathyServlet.Moreover, you gave the name
kathyServletto your servlet in the web.xml, but your mapping uses the nameKathyServlet. Servlet names are case-sensitive.如果该代码是正确的，则您的 web.xml 是错误的。 定义 servlet 类
您正在使用： org.yasin.KathyServlet
，您的 Servlet 是：
org.code.KathyServlet
您在 web.xml 中使用的 Servlet 需要指向正确的包和 Sevlet 名称。
您应该在 Tomcat 日志中看到与 404 错误相关的 ClassNotFound。
If that code is right you web.xml is bad. Your are defining a servlet-class using:
org.yasin.KathyServlet
and your Servlet is:
org.code.KathyServlet
The Servlet that you are using in your web.xml need to point to the correct package and Sevlet name.
You should see a ClassNotFound in your tomcat log associated with you 404 error.