利用Spring aop來加強原有OA項目中的一些方法

@Component

@Aspect

public class Internet {

@Pointcut("execution( * com.cheng.spring.ShowSalery.*(..))")
public void showSalary() {}

@Before(value = "showSalary()")
public void checkInternet() throws UnknownHostException {
	InetAddress localHost = InetAddress.getLocalHost();

	System.out.println("ip-----" + localHost);

}

}

@Component

@Aspect

public class Logger {

@Pointcut("execution( * com.cheng.spring.ShowSalery.*(..))")
public void showSalary() {}

@Before(value = "showSalary()")
public void log() {
	System.out.println("操做時間-----"+new Date());
}

}

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自定義註解 @Retention(RetentionPolicy.RUNTIME)

@Target(ElementType.METHOD)

public @interface PrivilegeAnnotation {

String privilege() default "";

}

@Component("privilege")

@Aspect

public class PrivilegeAscpect {

@Autowired
private List<User> users;

@Pointcut("execution( * com.cheng.spring.ShowSalery.*(..))")
public void showSalary() {}

// 環繞通知 可用來控制權限
@Around(value = "showSalary()")
public void isAccess(ProceedingJoinPoint point) throws Throwable {
	boolean flag = false;
	Class<? extends Object> class1 = point.getTarget().getClass();
	String name = point.getSignature().getName();

	Method declaredMethod = class1.getDeclaredMethod(name);
	declaredMethod.setAccessible(true);

	boolean annotationPresent = declaredMethod.isAnnotationPresent(PrivilegeAnnotation.class);
	if (annotationPresent) {
		PrivilegeAnnotation annotation = declaredMethod.getAnnotation(PrivilegeAnnotation.class);
		// 註解上的值
		String privilege = annotation.privilege();

		if (name.equals("showSalery")) {
			for (User user : users) {
				if (user.getName().equals(privilege)) {
					point.proceed();
				} else {
					System.out.println("你無權查看");
				}
			}
		} else {
			point.proceed();
		}

	}

}

}

@Component("showsalery")

public class ShowSalery {

@PrivilegeAnnotation(

privilege="admin")

public void showSalery() {

	System.out.println("工資爲100000$");
}

@PrivilegeAnnotation(privilege="admin")
public void updateSalery() {
	System.out.println("調整工資");
}

}

@Component("user")

public class User {

@Value("admin")

private String name;

public String getName() {
	return name;
}

}

public class ShowSaleryTest {

@Test
public void testShowSalery() {
	ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("beans3.xml");
	ShowSalery bean = context.getBean("showsalery",ShowSalery.class);
	bean.showSalery();
}

}