The first deployment to a servlet application on tomcat

The first deployment to a servlet application on tomcat

Built environment

EE version of eclipse

eclipse official website

Creating a java application

1.File->new java project

Import package servlet

Right-click the project -> properties -> Java Build Path -> Libraries -> Add External JARs

Download servlet.jar package

Links: https://pan.baidu.com/s/17aJimvcbiip9E6M-vM6S3w
extraction code: gfxt
copy the contents of this open Baidu network disk phone App, the operation more convenient oh

Write HelloServlet

1. Create a class at the right place src HelloServlet

2.HelloServlet class code

import java.io.IOException;
import java.util.Date;
 
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class HelloServlet extends HttpServlet{
 
    public void doGet(HttpServletRequest request, HttpServletResponse response){
         
        try {
            response.getWriter().println("<h1>Hello Servlet!</h1>");
            response.getWriter().println(new Date().toLocaleString());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
     
}

Create the appropriate directories

1. In accordance with the directory structure created corresponding web directory, WEB-INF directory, web.xml file

The contents of the file 2.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
 
    <servlet>
        <servlet-name>HelloServlet</servlet-name>
        <servlet-class>HelloServlet</servlet-class>
    </servlet>
 
    <servlet-mapping>
        <servlet-name>HelloServlet</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>
 
</web-app>

classes directory specified project output

1. Create classes directory under the WEB-INF directory

2. The classes directory to the output directory for the class files

Project Right -> properties-> Java Build Path-> Source-> lower right corner Brower-> specified location is j2ee / web / WEB-INF / classes

The project is deployed to tomcat

1. Open the server.xml file in the conf directory of tomcat

2. In the Host Context tag plus the tag below, and set the access path, the path and project

<Context path="/j2ee" docBase="D:\\programe\\eclipse-ee\\workspace\\myworkspace\\j2ee\\web" debug="0" reloadable="false" />

path is the access path, for example, I set up this way, access path is localhost: 8080 / j2ee / hello

docBase path of the project is to create different settings according to the situation

Running the Project

1. Restart Tomcat
2. Enter in the browser localhost: 8080 / j2ee / hello