spring bean autowiring - @Autowired

springautowiring/src/main/java/xing/rujuan/autowired/AppConfig.java

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+package xing.rujuan.autowired;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("xing.rujuan.autowired")
+public class AppConfig {
+}

springautowiring/src/main/java/xing/rujuan/autowired/AppMain.java

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+package xing.rujuan.autowired;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+public class AppMain {
+    public static void main(String[] args) {
+        ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
+        CustomerService customerService = context.getBean("customerService", CustomerService.class);
+        System.out.println(customerService.getCustomerDao());
+    }
+}

springautowiring/src/main/java/xing/rujuan/autowired/CustomerDao.java

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+package xing.rujuan.autowired;
+
+import org.springframework.stereotype.Repository;
+
+@Repository("custdao")
+public class CustomerDao {
+}

springautowiring/src/main/java/xing/rujuan/autowired/CustomerService.java

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+package xing.rujuan.autowired;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class CustomerService {
+
+//    @Autowired
+    private CustomerDao customerDao;
+
+    public CustomerService(){
+        System.out.println("default constructor....");
+    }
+
+    @Autowired
+    public CustomerService(CustomerDao customerDao) {
+        System.out.println("customized constructor....");
+        this.customerDao = customerDao;
+    }
+
+    public CustomerDao getCustomerDao() {
+        return customerDao;
+    }
+
+//    @Autowired
+    public void setCustomerDao(CustomerDao customerDao) {
+        System.out.println("setter...");
+        this.customerDao = customerDao;
+    }
+}