Im using spring and neo4j to make an application that stores peoples information in a database. Every time I launch my application im getting this error but cant figure out why. My code is below the error.
Code:
HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException
type Exception report
message Request processing failed; nested exception is java.lang.NullPointerException
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
root cause
java.lang.NullPointerException
com.mycompany.smsdatabase.service.PersonImport.doImportPerson(PersonImport.java:30)
com.mycompany.smsdatabase.controller.HomeController.Home(HomeController.java:24)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:601)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.40 logs.Code:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.mycompany.smsdatabase.controller;
import com.mycompany.smsdatabase.domain.Person;
import com.mycompany.smsdatabase.service.PersonImport;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
/**
*
* @author Anthony
*/
@Controller
public class HomeController {
@RequestMapping(value = "/", method = RequestMethod.GET)
public String Home()
{
PersonImport person = new PersonImport();
person.doImportPerson("anthony");
return "index";
}
}Code:
*/
package com.mycompany.smsdatabase.service;
import com.mycompany.smsdatabase.domain.Person;
import com.mycompany.smsdatabase.repositories.PersonRepository;
import javax.transaction.Transaction;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
/**
*
* @author Anthony
*/
@Service
public class PersonImport {
@Autowired
private PersonRepository PersonRepository;
public Person doImportPerson(String id)
{
Person person = PersonRepository.findById(id);
if (person == null) {
person = new Person(id,null);
}
PersonRepository.save(person);
System.out.println("+++++++++++++++++++++++++++++++++++++hello+++++++++++++");
return person;
}
}Code:
import com.mycompany.smsdatabase.domain.Person;
import org.springframework.data.neo4j.core.GraphDatabase;
import org.springframework.data.neo4j.repository.GraphRepository;
/**
*
* @author Anthony
*/
public interface PersonRepository extends GraphRepository<Person>{
Person findById(String id);
}