java JAX-RS：如何扩展应用程序类来扫描包？
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JAX-RS: How to extend Application class to scan packages?
提问by daydreamer
Currently, I do something similar to
目前，我做类似的事情
import javax.annotation.Nonnull;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
@ApplicationPath("oauth")
public class OAuthApplication extends Application {
final Set<Class<?>> classes = new HashSet<>();
@Nonnull
@Override
public Set<Class<?>> getClasses() {
classes.add(RegisterResource.class);
return Collections.unmodifiableSet(classes);
}
}
No if I add ten new Resources on the ApplicationPath, I need to do
不，如果我增加十个新Resource的S ApplicationPath，我需要做的
classes.add(<ClassName>.class);
ten times, it is tedious and sometimes forgetful as well.
十次，它是乏味的，有时也是健忘的。
Does JAX-RSor RESTEasyprovide the way so that I can mention the package name and classes are scanned under it?
是否JAX-RS或RESTEasy提供了一种方式，以便我可以提及包名称并在其下扫描类？
I know Jerseyhas something as
我知道Jersey有一些东西
public class MyApplication extends ResourceConfig {
public MyApplication() {
packages("org.foo.rest;org.bar.rest");
}
}
Any thoughts/ideas?
任何想法/想法？
UPDATE
更新
Seems we can do following in web.xml
似乎我们可以做以下 web.xml
<context-param>
<param-name>resteasy.scan</param-name>
<param-value>true</param-value>
</context-param>
Is there a specific Javaequivalent?
有具体的Java等价物吗？
回答by Paul Samsotha
"Is there a specific Java equivalent?"
“是否有特定的 Java 等价物？”
Simply leave the class empty, meaning do not override getClasses()or getSingletons(). Per the spec - 2.3.2:
只需将类留空，这意味着不要覆盖getClasses()或getSingletons()。根据规范 - 2.3.2：
[...]
In either of the latter two cases, if both
Application.getClassesandApplication.getSingletonsreturn an empty list then all root resource classes and providers packaged in the web application MUST be included in the published JAX-RS application. If eithergetClassesorgetSingletonsreturn a non-empty list then only those classes or singletons returned MUST be included in the published JAX-RS application.
[...]
在任何一种情况后两种情况下，如果同时
Application.getClasses并Application.getSingletons返回一个空列表，然后打包在Web应用程序根目录的所有资源类和供应商必须被包含在发布的JAX-RS应用程序。如果getClasses或getSingletons返回一个非空列表，那么只有那些返回的类或单例必须包含在发布的 JAX-RS 应用程序中。
So you can simply do
所以你可以简单地做
@ApplicationPath("oauth")
public class OAuthApplication extends Application {}
and your classpath will get scanned for @Pathand @Providerclasses. Override either method (returning a non-empty set), and only those classes will be added.
并且您的类路径将被扫描@Path和@Provider类。覆盖任一方法（返回非空集），并且只会添加那些类。
It should also be noted that public Map<String, Object> getProperties()can be safely overridden. You can use this to add arbitrary properties (even to register classes/features), as seen here, or if you need to configure a provider, you can do so in a Featureor DynamicFeatureas seen here
还应该注意的是，public Map<String, Object> getProperties()可以安全地覆盖。您可以使用它来添加任意属性（甚至注册类/功能），如此处所示，或者如果您需要配置提供程序，您可以在 aFeature或DynamicFeature如此处所示
回答by lalokana
Is a combination of all Application class, ResourceClass and @ApplicationPath
是所有Application类、ResourceClass和@ApplicationPath的组合
in agreement with the docsand the class ResourceConfigimplements by jersey the way to do is:
与文档一致，并且类ResourceConfig由 jersey 实现，方法是：
@ApplicationPath(value = "/resource")
public class ApplicationREST extends ResourceConfig {
public ApplicationREST() {
//add single resources
register(SimpleResource1.class);
register(SimpleResource2.class);
...
//enable multipar feature
register(MultiPartFeature.class);
...
//enable scan package and recursive
packages(true, "com.example.rest");
}
}
I hope this helps you
我希望这可以帮助你
回答by Vikas Mittal
It is very simple:
这很简单：
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath("/webapi")
public class MyApp extends Application {
}
This will scan all the classes annotated with @Provider and @Path.
这将扫描所有用@Provider 和@Path 注释的类。
