By Jim Jaquet
Create a basic Java app in SAP Cloud Platform
In this tutorial series you will start from zero and develop a fully operational weather application. In total there are 10 parts to the series, each building on top of its predecessor. The entire source code of both the final and all intermediate parts are available on GitHub.
The constituent parts of this tutorial series cover the following:
In Part 1, you will develop a basic Java app to ensure that both Eclipse IDE and the local SAP Cloud Platform (HCP) tooling have been properly installed and configured.
Create a new dynamic web project by selecting the File > New > Dynamic Web Project menu entry and enter the following information:
weatherappJava Web2.5Click on Next
Remove the standard src Source folder and add a new one called src/main/java to create a project that adheres to the standard Maven Directory Layout.
Change the default output folder to target/classes
Click on Next.
Change the Content Directory from WebContent to src/main/webapp (again, to adhere to Maven conventions)
Click on Finish.
Make sure you have your weatherapp project folder selected, and then create a new Servlet by selecting the File > New > Servlet menu entry and enter the following information:
com.sap.hana.cloud.samples.weatherapp.webHelloWorldServletClick on Next.
Change the URL Mapping from /HelloWorldServlet to /hello to make it a bit easier to memorize.
Click on Finish and the HelloWorldServlet.java file will open in the editor.
Now we need to do our first bit of coding. Navigate to the servlet’s doGet() method and replace the TODO comment with the following line of code and save your changes:
response.getWriter().println("Hello World!");
Choose the Manually define a new Server option and select the SAP / Java Web Server option from the server selection. Make sure to select Java Web as the server runtime environment.
Click on Finish. The internal browser is now started and displays the traditional message marking the first step into a new programmer’s journey.
Updated 12/12/2017
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10 min
JAVA_HOME environment variable to point to it.