将Java应用程序连接到IBM Bluemix中的SQL数据库

Question

I have created a Bluemix app that has a small SQL Database. I want to access the database from my site with API calls. I am new to Java so I used the starter code provided in the Liberty for Java runtime and followed the " tutorial " linked in the Bluemix Docs. I copied only the SQLDBSample.java file from the tutorial.

I am having a lot of trouble in getting the SQL connection code to run. I kept the @WebServlet("/SQLDBSample") and am unable to get the code to run even if I go to myapp.mybluemix.net/SQLDBSample. I just want to get API routes set up and be able to do AJAX calls within the site JavaScript.

Answer 1

Cloudant is not a SQL database. If you want to use the SQLDB example, you need to bind your app to the "SQL Database" service, not to Cloudant.

Answer 2

You can refer to the below link. It describes in detail about connectivity between java code and db2(sqldb), which explains various operations like binding to sqldb, examining vcap_services and more.

http://www.ibm.com/developerworks/cloud/library/cl-sqldb-app/

Answer 3

Two options to help you get started with Java and Cloudant NoSQL DB.

1) In the Bluemix UI, click on Catalog and create a Java Cloudant boilerplate. After you create your application, you can download the starter code and learn it

2) Read Java and Cloudant NoSQL DB on Bluemix blog post by @Sai-Vennam which describes the auto-configuration in detail.

Answer 4

None of these answers ended up working for me. I found no real solution so I switched to Node.js and got it working in minutes. I'd recommend using Node if you're using BlueMix. It's simpler.