我要评论1. 直接注入applicationcontext
@service
public class myservice {
@autowired
private applicationcontext applicationcontext;
public void dosomething() {
// 通过applicationcontext获取bean
userservice userservice = applicationcontext.getbean(userservice.class);
// 或者通过名称获取
userservice userservice2 = (userservice) applicationcontext.getbean("userservice");
}
}
2. 实现applicationcontextaware接口
@component
public class springcontextutil implements applicationcontextaware {
private static applicationcontext applicationcontext;
@override
public void setapplicationcontext(applicationcontext context) throws beansexception {
applicationcontext = context;
}
public static applicationcontext getapplicationcontext() {
return applicationcontext;
}
public static <t> t getbean(class<t> clazz) {
return applicationcontext.getbean(clazz);
}
public static <t> t getbean(string name, class<t> clazz) {
return applicationcontext.getbean(name, clazz);
}
public static object getbean(string name) {
return applicationcontext.getbean(name);
}
}
3. 通过springapplication.run()获取applicationcontext
@springbootapplication
public class application {
public static void main(string[] args) {
// 启动应用并获取applicationcontext
applicationcontext context = springapplication.run(application.class, args);
// 直接从context中获取bean
userservice userservice = context.getbean(userservice.class);
userservice.dosomething();
}
}
4. 通过beanfactory获取
@service
public class myservice {
@autowired
private beanfactory beanfactory;
public void dosomething() {
if (beanfactory.containsbean("userservice")) {
userservice userservice = (userservice) beanfactory.getbean("userservice");
// 使用userservice
}
}
}
5. 通过实现beanfactoryaware接口
@component
public class mycomponent implements beanfactoryaware {
private beanfactory beanfactory;
@override
public void setbeanfactory(beanfactory beanfactory) throws beansexception {
this.beanfactory = beanfactory;
}
public void dosomething() {
userservice userservice = (userservice) beanfactory.getbean("userservice");
// 使用bean
}
}
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