autowired

问题 Ok. We have the need to @Autowire a different webservice on-the-fly (preferably by toggling a JNDI setting on the webserver) and I'm at a loss on how to do this. This is the way I was approaching the problems.. Two packages: com.mycomp.service.stub com.mycomp.service.impl One package contains MyServiceStub.java while implement MyService The other package contains MyServiceImpl.java, which implements same My controller, which requires MyService, has the bean defined as such @Autowire private

问题 I am getting this error org.springframework.beans.factory.BeanCreationException: Could not autowire method: This is my spring's xml configuration. <bean ...> ... <property name="InfoModel" ref="InfoModel"></property> </bean> Here is my code where I am autowiring this in Java class private InfoModel infoModel; @Autowired public void setInfoModel(InfoModel infoModel) { this.infoModel= infoModel; } Am I missing something. I suspect that I should make an Interface of InfoModel in order to make it

问题 I have this problem that I cannot fix. From my @Controller , i can easily access my autowired @Service class and play with it no problem. But when I do that from a separate class without annotations, it gives me a NullPointerException . My Controller (works)- @Controller public class UserController { @Autowired UserService userService;... My separate Java class (not working)- public final class UsersManagementUtil { @Autowired UserService userService; or @Autowired UserDao userDao;

问题 We know in Spring, <bean> has an attribute "primary" to indicate a bean is the first candidate if there are multiple beans are available to be autowired to a property. But now all my bean definition are declared using @Component/@Service, etc, I can't find the corresponding "primary" attribute I can use to declare a bean. Please advise how can I achieve this, thanks. 回答1: In Spring 3.0, you use @Primary. Indicates that a bean should be given preference when multiple candidates are qualified

问题 I need to inject by @Autowired concrete implementation of a service class. Service interface: public interface PostService { ... } Implementation: @Service("postServiceImpl") public class PostServiceImpl implements PostService { ... } Methods in the service are with @ Transactional annotation And now I want to inject postServiceImpl to my controller - because I need to use one method from the implementation, that is not in the interface: @Autowired @Qualifier("postServiceImpl") private

问题 my spring.xml is as below <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oxm="http://www.springframework.org/schema/oxm" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org

问题 Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.spring.dto.Car2' available Controller.java - public class Controller { public static void main(String[] args) { ConfigurableApplicationContext context = new ClassPathXmlApplicationContext("configu.xml"); Car2 c2 = (Car2) context.getBean(Car2.class); System.out.println(c2); } } Car2.java - @ToString @Component public class Car2 { @Autowired private Engine engine; } Engine

问题 I must be missing something simple, but I'm having trouble getting an Autowired property to be assigned to a bean. All similar answers posted here seem to revolve around one of three solutions: extend SpringBeanAutowiringSupport use <context:component-scan base-package="..." /> in applicationContext.xml use <context:annotation-config /> in applicationContext.xml I tried to make a minimalist bean to represent my DAO and inject it into a Web Service. DAO interface: package wb; public interface

问题 After spending 2 days on this issue I really can't make any more progress on my own. I am working on a standard web application with Spring for dependency injection and the likes. I am also using Spring to cache several expensive methods I use a lot. After I introduced Apache Shiro for the security layer, I was experiencing a strange issue where @Cacheable methods in a certain service no longer got cached. To this point, I was able to strip the problem down to its core, but there's still a

问题 I am building an application using Stomp to broker messages over websockets. I am trying to send messages from the server to the client without a request from anywhere in the application. I found two separate choices online for sending messages from anywhere in the application. The first is found in the Websocket documentation. Section 20.4.5: @Controller public class GreetingController { private SimpMessagingTemplate template; @Autowired public GreetingController(SimpMessagingTemplate