Cloud Training 1 - Create Maven Project and Deploy to Tomcat

Wang Tiven April 24, 2017

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JDK8

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

JAVA_HOME PATH

Check Java

java -version

Tomcat8

http://tomcat.apache.org/download-80.cgi

CATALINA_HOME

Startup Tomcat

%TOMCAT HOME%\bin\startup.bat

http://127.0.0.1:8080/

http://127.0.0.1:8080/examples

Maven3

https://maven.apache.org/download.cgi?Preferred=http%3A%2F%2Fmirrors.tuna.tsinghua.edu.cn%2Fapache%2F

PATH

Check Maven

mvn -v

Create Project

1 Generate Project by Maven

mvn archetype:generate -DgroupId=com.tiven -DartifactId=myapp -DarchetypeArtifactId=maven-archetype-webapp -DinteractiveMode=false

2 Build and Package

mvn package

3 Deploy to Tomcat Container

Deploy war into tomcat apache-tomcat-8.5.14\webapps

4 Check your Web Application - jsp

http://127.0.0.1:8080/WebApp/

Create a Servlet

1 Create HelloCloud class

package com.tiven;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class HelloCloud extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException
    {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Hello Cloud!</title>");
        out.println("</head>");
        out.println("<body>");
        out.println("<h1>Hello Cloud!</h1>");
        out.println("</body>");
        out.println("</html>");
    }
}

2 Add servlet configures in web.xml

<servlet>
    <servlet-name>HelloCloud</servlet-name>
    <servlet-class>com.tiven.HelloCloud</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>HelloCloud</servlet-name>
    <url-pattern>/servlets/HelloCloud</url-pattern>
</servlet-mapping>

3 Add Servlet Dependencies in pom.xml

<dependencies>
  ...

  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    <scope>provided</scope>
  </dependency>
</dependencies>

4 Re Build and Package

mvn clean packge

5 Check the Servlet

http://127.0.0.1:8080/WebApp/servlets/HelloCloud

Eclipse IDE Support

mvn eclipse:eclipse -Dwtpversion=2.0

import into eclipse

add tomcat7 plugin in pom.xml

<plugins>
  <plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>2.0</version>
  </plugin>
</plugins>

mvn tomcat7:run

Debug in Eclipse IDE

mvndebug tomcat7:run

Run Remote Java Application in Debug Configurations at local port 8000

debug in servlet

download source codes for maven dependencies:

mvn dependency:sources mvn dependency:resolve -Dclassifier=javadoc

or Configure them in eclipse