使用FactoryBean来配置特定Bean

有时我们需要创建一些特定功能的bean,该如何做呢?

1.创建实现FactoryBean的工厂

public class ProxyFactoryBean<T> implements FactoryBean<T> {
    private Class<T> proxyInterface;
    @Autowired
    private QrpcProxy qrpcProxy;
    public ProxyFactoryBean() {
    }
    public ProxyFactoryBean(Class<T> proxyInterface) {
        this.proxyInterface = proxyInterface;
    }
    @Override
    public T getObject() {
        return qrpcProxy.create(proxyInterface);
    }
    @Override
    public Class<?> getObjectType() {
        return this.proxyInterface;
    }
    @Override
    public boolean isSingleton() {
        return true;
    }
}

2.在xml配置bean

   <bean id="testService" class="com.qrpc.server.utils.ProxyFactoryBean">
        <constructor-arg value="com.qrpc.api.facade.TestService"/>
    </bean>

3.使用

@RestController
public class TestController {
    @Autowired
    private TestService testService;
    @GetMapping(BASE_GETSTRING)
    public String getString() {
        return testService.getString();
    }
}