How do i use a dependency for Servlet?

Question

i have a businessLogic layer and I want to use it in servlet , but anything I do it's throws me an error

@WebServlet("/Servlet")
public class Servlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       IPersonService service;

    public Servlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    @Override
    public void init(){
        service=new PersonService();
    }
    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        service.getAll();
    }

I have tried everything .....ps. PersonService is from an external project and i have refference .I test it in his own projet and it works , but when i want to use it in servlet it gives me a strange eror

Caused by: java.lang.NoClassDefFoundError: LBusinessInterfaces/IPersonService;
    at java.lang.Class.getDeclaredFields0(Native Method)
    at java.lang.Class.privateGetDeclaredFields(Unknown Source)
    at java.lang.Class.getDeclaredFields(Unknown Source)
    at org.apache.catalina.util.Introspection.getDeclaredFields

Somebody help please

Do you have the jar containing the IPersonService class inside WEB-INF/lib in your deployed webapp? That's where it must be. — JB Nizet, Sep 12 '16 at 18:37

score 1 · Accepted Answer · answered Sep 12 '16 at 18:37

1

You need to have your external dependency jar that contains your business interface (PersonService). into the servlet container. Should be either 'lib' folder of the container, or it should be found inside your projects 'WEB-INF/lib' folder.

answered Sep 12 '16 at 18:37

kuhajeyan

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how do i make a jar from my interfaces? – joesid Sep 12 '16 at 18:42
1

As you would do with usual java class files. http://stackoverflow.com/questions/9941296/how-do-i-make-a-jar-from-a-java – kuhajeyan Sep 12 '16 at 18:43
2

Refer : http://stackoverflow.com/questions/11243442/create-jar-file-from-command-line – dvsakgec Sep 12 '16 at 19:10
1

For different IDEs simply search on StackOverFlow – dvsakgec Sep 12 '16 at 19:10

How do i use a dependency for Servlet?

1 Answers1