如何在AS400 JDE上创建Web服务并在Netbeans Java中使用它们

My problem is that I don't know how access the data from my java application. I am using netbeans 6.9.1 and I created already a connection with AS400 using jdbc:as400://DBase... I tried to create Stored Procedures or create Web Services to consume them from my java application, but I couldn't. Also, I tried to create Entities Classes from Database but AS400 database has not primary keys. Any idea how I can use this database in my java application? Thank a lot!!!My problem is that I don't know how access the