获取@Service注释类的bean？

Question

In my web application, I am not using applicationContext.xml . How can I get the bean of @Service annotated class?

If I used the applicationContext.xml in my web application, I have to load the applicationContext.xml every time to get the bean of the @Service annotated class.

I used this way

WebApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext);
ServerConnection  con = (ServerConnection ) ctx.getBean("con");

My Service class will be as ,

@Service  or @Service("con")
public class ServerConnection {

    private  TServerProtocol tServerProtocol;
    private  URI uri;

    public TServerProtocol getServerConnection(){

        System.out.println("host :"+host+"\nport :"+port);

        try {
            uri = new URI("tcp://" + host + ":" + port);
        } catch (URISyntaxException e) {
            System.out.println("Exception in xreating URI Path");
        }

        tServerProtocol = new TServerProtocol(new Endpoint(uri));
        return tServerProtocol;
    }
}

Is there any other way to get a bean of this class ?

or

What is the proper way to get a bean of @Service annotated class in case of core application and web application in Spring3.x?

Answer 1

ApplicationContext context=SpringApplication.run(YourProjectApplication.class, args);

此上下文可用于获取注释@Bean和@Service创建的bean

context.getBean(className.class);

Answer 2

If you are using annotation-based configuration, you use @Autowired to get the bean by its type or @Resource to get the bean by its name. Use only one of these for any particular property (to keep confusion down).

@Autowired
private ServerConnection connection;

@Resource(name = "con")
private ServerConnection connection;

There's also @Inject , but I don't like that as it gets less nice as the number of beans goes up. YMMV.

Answer 3

Since you are making use of annotation, I believe you would prefer the use of @Autowired . If you have a class that will call ServerConnection (lets say CallingClass under package com.foo ), then this is how it would look like:

package com.foo;

@Component
public class CallingClass{

   @Autowired
   private ServerConnection serverConnection

    // add your getters and setters
}

Then on your applicationContext.xml just add the following

<context:component-scan base-package="com.foo" />

Hope I answered your question.

Answer 4

If you working in some bean outside spring then you can use normal Spring annotations:

@Autowired
private Dependency1 dependency1;

@Autowired
private Dependency2 dependency2;

@Autowired
private Dependency2 dependency2;

then call one time from inside of this class:

SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);

to inject all dependencies. It may be more convinient if you have multiple dependencies.