@ContextConfiguration({"/META-INF/spring/amazing-base.xml"})
@RunWith(SpringJUnit4ClassRunner.class)
public class SpringInjectionTest {
  @Autowired
  private Cust normalCust;
  
  @Test
  public void testFieldInjection() {
    System.out.println("testFieldInjection begin");
    normalCust.recharge();
    System.out.println("testFieldInjection end");
  }
}

@ContextConfiguration({"/META-INF/spring/amazing-base.xml"})
@RunWith(SpringJUnit4ClassRunner.class)
public class SpringInjectionTest {
  @Autowired
  private Cust normalCust;
  
  @Test
  public void testConstructorInjection() {
    System.out.println("testConstructorInjection begin");
    ChargeThread thread = new ChargeThread(normalCust);
    thread.run();
    System.out.println("testConstructorInjection end");
  }
  
}

public class ChargeThread implements Runnable {
  
  private Cust cust;
  
  public ChargeThread(Cust cust) {
    this.cust = cust;
  }

  public void run() {
    cust.recharge();
  }

}

public class SpringInjectionTest {
  @Test
  public void testSetterInjection() {
    System.out.println("testSetterInjection begin");
    String result = RechargeUtil.InstantRecharge();
    System.out.println("testSetterInjection end, " + result);
  }

}

@Component
public final class RechargeUtil {
  
  private RechargeUtil() {
    
  }
  
  private static Cust normalCust;
  
  @Autowired
  public void setNormalCust(Cust normalCust) {
    RechargeUtil.normalCust = normalCust;
  }

  public static String InstantRecharge() {
    normalCust.recharge();
    return "InstantRecharge Success!";
  }
}