Java 如何获取自定义批注的@PathVariable值?
我有一个控制器:Java 如何获取自定义批注的@PathVariable值?,java,spring,spring-mvc,aspectj,spring-annotations,Java,Spring,Spring Mvc,Aspectj,Spring Annotations,我有一个控制器: @Authorised(id = "{personId}") @RequestMapping(value = {"{personId}"}, method = GET) public void test(@PathVariable PersonId personId) { System.out.println(personId); //gets personId } 注释: @Target({ElementType.METHOD}) @Retention(Retent
@Authorised(id = "{personId}")
@RequestMapping(value = {"{personId}"}, method = GET)
public void test(@PathVariable PersonId personId) {
System.out.println(personId); //gets personId
}
注释:
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Authorised {
String id() default "";
}
@Pointcut("@annotation(Authorised)")
private void AuthorisedMethod() {}
@Before("AuthorisedMethod()")
public void checkIfIsCurrentlyAuthenticated(JoinPoint joinPoint) throws NoSuchMethodException {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
String methodName = signature.getMethod().getName();
Class<?>[] parameterTypes = signature.getMethod().getParameterTypes();
Parameter[] parameters = signature.getMethod().getParameters();
Authorised annotations = joinPoint.getTarget().getClass().getMethod(methodName, parameterTypes).getAnnotation(Authorised.class);
String id = annotations.id();
System.out.println(id); // prints: "{personId}"
// do the chekcing
throw new UnauthenticatedUserException();
}
切入点:
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Authorised {
String id() default "";
}
@Pointcut("@annotation(Authorised)")
private void AuthorisedMethod() {}
@Before("AuthorisedMethod()")
public void checkIfIsCurrentlyAuthenticated(JoinPoint joinPoint) throws NoSuchMethodException {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
String methodName = signature.getMethod().getName();
Class<?>[] parameterTypes = signature.getMethod().getParameterTypes();
Parameter[] parameters = signature.getMethod().getParameters();
Authorised annotations = joinPoint.getTarget().getClass().getMethod(methodName, parameterTypes).getAnnotation(Authorised.class);
String id = annotations.id();
System.out.println(id); // prints: "{personId}"
// do the chekcing
throw new UnauthenticatedUserException();
}
以及必须获取{personId}值而不是字符串“{personId}”的方法:
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Authorised {
String id() default "";
}
@Pointcut("@annotation(Authorised)")
private void AuthorisedMethod() {}
@Before("AuthorisedMethod()")
public void checkIfIsCurrentlyAuthenticated(JoinPoint joinPoint) throws NoSuchMethodException {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
String methodName = signature.getMethod().getName();
Class<?>[] parameterTypes = signature.getMethod().getParameterTypes();
Parameter[] parameters = signature.getMethod().getParameters();
Authorised annotations = joinPoint.getTarget().getClass().getMethod(methodName, parameterTypes).getAnnotation(Authorised.class);
String id = annotations.id();
System.out.println(id); // prints: "{personId}"
// do the chekcing
throw new UnauthenticatedUserException();
}
@之前(“authorizedMethod()”)
public void checkificscurrentlyauthenticated(JoinPoint-JoinPoint)抛出NoSuchMethodException{
MethodSignature=(MethodSignature)joinPoint.getSignature();
String methodName=signature.getMethod().getName();
类[]parameterTypes=signature.getMethod().getParameterTypes();
参数[]参数=signature.getMethod().getParameters();
授权注释=joinPoint.getTarget().getClass().getMethod(方法名,参数类型).getAnnotation(授权的.class);
String id=annotations.id();
System.out.println(id);//打印:{personId}
//检查
抛出新的未经身份验证的UserException();
}
它能实现吗?如何实现?
更新:但如果方法参数号和切入点args()不匹配怎么办?我的意思是,如果特定方法有参数@PathVariable PersonId PersonId和其他几个参数,但poincut只需要知道PersonId PersonId,该怎么办?
例如,@statut说您必须这样编写args():args(personId,…)您可以修改
@Before()
注释,使其具有personId
值,并将该值传递给aspect
@Before("AuthorisedMethod() && args(personId)")
public void checkIfIsCurrentlyAuthenticated(JoinPoint joinPoint, PersonId personId) throws NoSuchMethodException {}
为了测试它,我有以下方面:
@Aspect
@Component
public class SomeAspect {
@Pointcut("@annotation(Authorised)")
private void AuthorisedMethod() {
}
@Before("AuthorisedMethod() && args(personId)")
public void checkIfIsCurrentlyAuthenticated(JoinPoint joinPoint, PersonId personId) throws NoSuchMethodException {
System.out.println("aspect " + personId.getId());
}
}
配置类:
@Configuration
@ComponentScan(basePackages = {"test"})
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class Config {
}
测试组件:
@Component
public class Test {
@Authorised(id = "{personId}")
public void test(PersonId personId) {
System.out.println("component " + personId.getId()); //gets personId
}
}
和testNG的跑步者:
@ContextConfiguration(classes = Config.class)
public class TestRunner extends AbstractTestNGSpringContextTests {
@Autowired
test.Test test;
@Test
public void testName() {
test.test(new PersonId("id"));
}
}
当我运行它时,我会从aspect中打印出
“aspect id”
,并从调用的方法中打印出“component id”
。如果可能的话,您还可以使用HandlerInterceptor在RequestMapping URL中获取PathVariable的值
编写一个拦截此请求的处理程序类
public class AuthorisedHandler extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
if (!isResourceHandler(handler) && (handler instanceof HandlerMethod)) {
HandlerMethod hm = (HandlerMethod) handler;
Method method = hm.getMethod();
Authorised authAnnotation = method.getAnnotation(Authorised.class);
if (authAnnotation != null) {
String personId = getPersonId(request);
//Do all your validations Here
}
}
return true;
}
@SuppressWarnings("rawtypes")
private String getPersonId(HttpServletRequest request) throws IOException {
String personId = request.getParameter("personId");
if(personId == null || personId.equals("")){
Map pathVariables = (Map) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
personId = (String) pathVariables.get("personId");
}
return personId;
}
private boolean isResourceHandler(Object handler) {
return handler instanceof ResourceHttpRequestHandler;
}
}
您必须在SpringConfigXML或SpringJavaConfig中配置这个处理程序bean
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="com.**.AuthorisedHandler" />
</mvc:interceptor>
</mvc:interceptors>
现在,所有的请求都将通过这个拦截器。只有用@authorized注释的才会通过。如果我按照您建议的方式更改注释和方法签名,那么CheckifiScurrentAuthenticated方法根本不会被调用。你知道为什么吗@你能分享你的代码吗?我自己也试过了,效果很好。对不起,我不能,因为它是在一个更大的项目中实现的。这里是它的简化版本。但问题还是一样:)@statut@BrainDead我在答案中添加了一些测试代码,请看我唯一没有的是@EnableAspectJAutoProxy(proxyTargetClass=true)。在我添加它之后,没有任何变化。是的,这可能是解决这个问题的一种方法,但这不是我问题的答案:)