如何启用MultiPartFeature? [英] How can I enable MultiPartFeature?

问题描述

我的JAX-RS应用程序具有扩展的Application类.

My JAX-RS application has an extended Application class.

@ApplicationPath("/")
public class MyApplication extends Application {
    // empty; really empty
}

如何在不修改类的情况下启用org.glassfish.jersey.media.multipart.MultiPartFeature?还是不需要注册所有资源类/程序包?

How can I enable org.glassfish.jersey.media.multipart.MultiPartFeature without modifying the class? Or without the necessity of registering all resource classes/packages?

推荐答案

不确定为什么不只使用ResourceConfig而不是Application类.我能想到的唯一原因是可移植性，但是使用Jersey特定的多部分功能已经破坏了可移植性.

Not sure why you don't just use a ResourceConfig instead of an Application class. The only reason I can think of is portability, but the use of the Jersey specific multipart feature already breaks that portability.

但是无论如何，我将尝试以最可移植"的方式回答这个问题.您可以像在web.xml中一样设置属性.要设置任意属性，您可以覆盖

But anyway, I'll try to answer this in the "most portable" way. What you can do is set a property, as you would in a web.xml. To set arbitrary properties, you can override

@Override
public Map<String, Object> getProperties() {}

Application子类中的

，并在那里设置属性.

in the Application subclass, and set the properties there.

@Override
public Map<String, Object> getProperties() {
    Map<String, Object> props = new HashMap<>();
    props.put("jersey.config.server.provider.classnames", 
            "org.glassfish.jersey.media.multipart.MultiPartFeature");
    return props;
}

这将维护您的资源和提供程序的类路径扫描.仅当您覆盖getClasses()或getSingletons()(并返回非空集)时，才禁用扫描，但是getProperties()可以.

This will maintain the classpath scanning for your resources and providers. The scanning is only disabled if you override getClasses() or getSingletons() (and return non-empty sets), but getProperties() is fine.

另一个选项:

创建一个Feature来包装 that 功能，并让该功能被发现，如在此处看到

Create a Feature to wrap that feature, and let the feature be discovered, as seen here

我个人而言...

只需使用ResourceConfig，因为您已经破坏了可移植性(还有点破损:-)

Just use a ResourceConfig, as you're already breaking portability (what's a little more breakage :-)

@ApplicationPath("/")
public class AppConfig extends ResourceConfig {
    public AppConfig() {
        packages("packages.to.scan");
        register(MultiPartFeature.class);
    }
}

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