autowired

问题 i'm trying to configure spring boot in order to have tomcat connection pool to my production database. My application is NOT web (i have also some difficult to tell that to spring). I have a Startup class and 3 more classes the code @Configuration @EnableAutoConfiguration(exclude = DataSourceAutoConfiguration.class) public class Starter { private static Logger logger; @Autowired private static MyController controller; public static void main(String[] args) { // SpringApplication

问题 I am getting null pointer exception while trying to add anything in my solrQueue. I checked in debugger and it is because solrQueue is null. But I have autowired it in my application context then why this error? public class Check { @Autowired public LinkedBlockingQueue<SolrInputDocument> solrQueue; public SolrInputDocument solrDoc; public void solradd(){ solrDoc=new SolrInputDocument(); solrDoc.addField("title", "abc"); solrQueue.add(solrDoc);//solrQueue is null } } application Context.xml <

问题 I'm trying to use prism 7.1 AutoWirePartialView to bind a PartialView to its viewModel. However, binding is not working, or at least, setting the viewModel to the PartialView does not seem to work, it still has the page's BindingContext as BindingContext. There is my Page : <?xml version="1.0" encoding="utf-8" ?> <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="Project.Core.Views.NotConnectedViews.ForecastDemoPage"

问题 I'd like to provide a default bean by a custom jar. Only if the user implements a specific abstract class the default bean injection should be skipped. The following setup already works fine, except one thing: any injected classes within the default wired class are null ! What might I be missing? @Configration public class AppConfig { //use the default service if the user does not provide an own implementation @Bean @Conditional(MissingServiceBean.class) public MyService myService() { return

问题 How to change my code to make it work? public class GetDataFromTheWarehouse implements ServletContextListener { @Autowired ScheduledTask scheduledTask; private ScheduledExecutorService scheduler = null; public GetDataFromTheWarehouse() { } public void contextDestroyed(ServletContextEvent arg0) { try { System.out.println("Scheduler Shutting down successfully " + new Date()); scheduler.shutdown(); } catch (Exception ex) { } } public void contextInitialized(ServletContextEvent arg0) { if (

问题 In normal Spring, when we want to autowire an interface, we define it's implementation in Spring context file. What about Spring boot? how can we achieve this? currently we only autowire classes that are not interfaces. Another part of this question is about using a class in a Junit class inside a Spring boot project. If we want to use a CalendarUtil for example, if we autowire CalendarUtil, it will throw a null pointer exception. What can we do in this case? I just initialized using "new"

问题 I run into a strange problem where a Component injected with @Autowire is available in one class, but not in another one. I use @Autowired in the attribute network of the classes Account and Agreement , but it is autowired only in the class Agreement but not in Account . The @ComponentScan runs over the 3 needed packages. Here is the start class: package com.ser.pm.tests; @SpringBootApplication @ComponentScan("com.ser.pm.agreement, com.ser.pm.network, com.ser.pm.address") public class zt

问题 Ok. I am not sure how to even ask the question, which is the sign I must be missing something. The best I can do is: "Is there a way to instantiate an object manually and still use injection within that object?" Concretely, say I have: class A { public A(MyObject1 obj1, MyObject2 obj2, ..., MyObjectn objn) { ... } } I want to wire all of these objects except MyObjectn. As far as I know, if I use @Autowired in front of that constructor above, then I should only instantiate that object as

问题 I am developing two spring based application(Ex app1 and app2) fully on Java configuration with Maven and no XML config. Through Maven -WAR plugin , I have created Jar reference of app2 and using mvn install:install file I have binded the app2 jar with app1. app2 - Its used to fetch inforamtion from data source. I have autowired the app2 serive in app1 implementation class to fetch the details which was annotated with @Service in app2 application. My first doubt is: Both app1 and app2 have

问题 Spring appears to scan for and pick up my bean, like so: 16:38:18.328 [MainThread] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Creating shared instance of singleton bean 'ABCProvider' 16:38:18.328 [MainThread] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Creating instance of bean 'ABCProvider' 16:38:18.334 [MainThread] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Creating shared instance of singleton bean 'getABCSupplier' 16:38:18.334 [MainThread] DEBUG o.s.b.f.s.DefaultListableBeanFactory -