Restlet实战（十一）结合源代码修改Restlet-Spring配置文件
上篇文章结合了Restlet的源码分析了Restlet－spring的配置文件，并提出了相关的问题，本篇将对这一问题做一个测试解答。首先修改一下Spring的配置文件：
<bean id="restRoute" class="org.restlet.ext.spring.SpringRouter"><property name="attachments"><map><entry key="/customers"><bean class="org.restlet.ext.spring.SpringFinder"><lookup-method name="createResource" bean="customersResource" /></bean></entry><entry key="/customers/{customerId}"><bean class="org.restlet.ext.spring.SpringFinder"><lookup-method name="createResource" bean="customerResource" /></bean></entry><entry key="/users"><bean class="com.mycompany.restlet.application.UserApplication"/></entry></map></property></bean>
除了配置customer外，还配置了一个跟User相关的Application：
public class UserApplication extends Application{@Overridepublic synchronized Restlet createRoot() {Router router = new Router(getContext());router.attach("/{userId}", UserResource.class);router.attach("/{userId}/orders", UserOrdersResource.class);return router;}}
为了测试更加的清晰，不在Customer相关类上面做修改了，另外建立两个资源文件：UserResource和UserOrdersResource，对应的URL应该分别是：/users/{userId}和/users/{userId}/orders,第一个URL意思是根据id查询得到某个user，而第二个则是查询得到某个user对应的所有的order。
public class UserResource extends Resource {String userId;public UserResource(Context context, Request request, Response response) {super(context, request, response);userId = (String) request.getAttributes().get("userId");getVariants().add(new Variant(MediaType.TEXT_PLAIN));}@Overridepublic Representation represent(Variant variant) {String userMsg = "current user id is " + userId;Representation representation = new StringRepresentation(userMsg,MediaType.TEXT_PLAIN);return representation;}}
public class UserOrdersResource extends Resource {String userId;public UserOrdersResource(Context context, Request request, Response response) {super(context, request, response);getVariants().add(new Variant(MediaType.TEXT_PLAIN));userId = (String) request.getAttributes().get("userId");}@Overridepublic Representation represent(Variant variant) {String userMsg = "get all orders for user whose id is: " + userId;Representation representation = new StringRepresentation(userMsg,MediaType.TEXT_PLAIN);return representation;}}
需要注意的是，上面两个资源是直接attach到Application，而不是之前文章讲的那样由SpringFinder接管，所以，之前文章强调一些规则，如需要有一个无参的构造函数，一个init方法等，就不适用于上述的两个资源的定义。
没有别的代码，来测试一下吧，打开浏览器，输入http://localhsot:8080/restlet/resources/users/1后，页面会显示：
current user id is 1而输入http://localhost:8080/restlet/resources/users/1/orders 后，页面会显示：
get all orders for user whose id is: 1
我们接着测试，如果value是String，会怎么样：
页:
[1]