When i try to add data's into database ,i got this error here i'm not using @Autowired annotation because when i use it got multiple errors instead here i used constructor level injection....
SEVERE: Exception sending context initialized event to listener instance of class [org.springframework.web.context.ContextLoaderListener] org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'homeController' defined in file [C:\Users\yuva\eclipse2.metadata.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\SSLNew\WEB-INF\classes\com\changepond\spring\controller\HomeController.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.changepond.spring.controller.HomeController]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.changepond.spring.controller.HomeController.() at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1076) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1021) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4766) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5230) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:835) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:263) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:432) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:927) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.startup.Catalina.start(Catalina.java:772) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:345) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:476) Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.changepond.spring.controller.HomeController]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.changepond.spring.controller.HomeController.() at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1069) ... 43 more Caused by: java.lang.NoSuchMethodException: com.changepond.spring.controller.HomeController.() at java.base/java.lang.Class.getConstructor0(Class.java:3349) at java.base/java.lang.Class.getDeclaredConstructor(Class.java:2553) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80) ... 44 more
Controller:
@Controller
public class HomeController {
//@Autowired
private ProductService pservice;
public HomeController(ProductService pservice) {
this.pservice = pservice;
}
@RequestMapping(value = { "/"}, method = RequestMethod.GET)
public ModelAndView welcomePage()
{
ModelAndView model = new ModelAndView();
model.setViewName("welcomePage");
return model;
}
@RequestMapping(value = { "/homepage"}, method = RequestMethod.GET)
public ModelAndView homepage()
{
ModelAndView model = new ModelAndView();
model.setViewName("homepage");
return model;
}
@RequestMapping(value = {"/addproduct"}, method = RequestMethod.POST)
public ModelAndView addproduct(Product product)
{
this.pservice.saveProduct(product);
ModelAndView model = new ModelAndView();
model.setViewName("welcomePage");
return model;
}
@RequestMapping(value = "/loginPage", method = RequestMethod.GET)
public ModelAndView loginPage(@RequestParam(value = "error",required = false) String error,
@RequestParam(value = "logout", required = false) String logout)
{
ModelAndView model = new ModelAndView();
if (error != null) {
model.addObject("error", "Invalid Credentials provided.");
}
if (logout != null) {
model.addObject("message", "Logged out from JournalDEV successfully.");
}
model.setViewName("loginPage");
return model;
}
}
@Service
public class ProductService {
//@Autowired
private ProductRepo productRepo;
public ProductService (ProductRepo productRepo)
{
this.productRepo = productRepo;
}
@Transactional
public boolean saveProduct(Product product)
{
this.productRepo.save(product);
return true;
}
}
Repository
@Repository
public interface ProductRepo extends JpaRepository<Product, Integer>{
}
