我正在尝试通过创建一个小型RESTful服务来学习球衣。我想出于特定原因使用过滤器（就像我想使用 ContainerResponseFilter 用于 CORS 标头来允许跨域请求）。但是，我只是无法让这些过滤器拦截我的电话。我已经看到了这个问题的所有帖子，他们中的大多数都说要注册注释提供者或web.xml。
我尝试在 web.xml 中注册文件，并为容器提供@Provider注释
这是我的web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html#d4e194 -->
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/spring/config/BeanLocations.xml</param-value>
</context-param>
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>com.rest.example</param-value>
</init-param>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.rest.example.cors</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>
<param-value>com.rest.example.CORSFilter</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.spi.container.ContainerRequestFilters</param-name>
<param-value>com.rest.example.RequestFilter</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/webresources/*</url-pattern>
</servlet-mapping>
</web-app>
以下是我的过滤器：
package com.rest.example.cors;
import javax.ws.rs.ext.Provider;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerResponse;
import com.sun.jersey.spi.container.ContainerResponseFilter;
@Provider
public class CORSFilter implements ContainerResponseFilter {
public ContainerResponse filter(ContainerRequest creq,
ContainerResponse cresp) {
cresp.getHttpHeaders().putSingle("Access-Control-Allow-Origin", "*");
cresp.getHttpHeaders().putSingle("Access-Control-Allow-Credentials", "true");
cresp.getHttpHeaders().putSingle("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS, HEAD");
cresp.getHttpHeaders().putSingle("Access-Control-Allow-Headers", "Content-Type, Accept, X-Requested-With");
return cresp;
}
}
package com.rest.example.cors;
import javax.ws.rs.ext.Provider;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerRequestFilter;
@Provider
public class RequestFilter implements ContainerRequestFilter {
public ContainerRequest filter(ContainerRequest request) {
System.out.println("request filter");
return request;
}
}
Link到我的github项目。
答案 0 :(得分：10)
我添加了一个Jersey Application类并在类中注册了过滤器，这解决了我的问题。还将我的球衣版本从1.x升级到2.x
public class MyApplication extends ResourceConfig {
/**
* Register JAX-RS application components.
*/
public MyApplication () {
register(RequestContextFilter.class);
register(JacksonFeature.class);
register(CustomerResource.class);
register(Initializer.class);
register(JerseyResource.class);
register(SpringSingletonResource.class);
register(SpringRequestResource.class);
register(CustomExceptionMapper.class);
}
}
答案 1 :(得分：6)
我解决了Wildfly 10 / rest这样的问题（CORSFilter是我的ContainerResponseFilter）：
import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath("/rest")
public class JaxRsActivator extends Application {
@Override
public Set<Class<?>> getClasses() {
final Set<Class<?>> resources = new HashSet<Class<?>>();
resources.add(CORSFilter.class);
return resources;
}
}
答案 2 :(得分：1)
<init-param>
<param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>
<param-value>org.anchepedheplatform.infrastructure.core.filters.ResponseCorsFilter</param-value>
</init-param>
首先，我写了一个实现com.sun.jersey.spi.container.ContainerResponseFilter
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerResponse;
import com.sun.jersey.spi.container.ContainerResponseFilter;
/**
* Filter that returns a response with headers that allows for Cross-Origin
* Requests (CORs) to be performed against the platform API.
*/
public class ResponseCorsFilter implements ContainerResponseFilter {
@Override
public ContainerResponse filter(final ContainerRequest request, final ContainerResponse response) {
final ResponseBuilder resp = Response.fromResponse(response.getResponse());
resp.header("Access-Control-Allow-Origin", "*")
.header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
final String reqHead = request.getHeaderValue("Access-Control-Request-Headers");
if (null != reqHead && !reqHead.equals(null)) {
resp.header("Access-Control-Allow-Headers", reqHead);}
response.setResponse(resp.build());
return response;
}
后来我把这个类的引用放在 intit-param web.xml中。
答案 3 :(得分：0)
如果您要扩展ResourceConfig课程，注册所有提供者的过程可能会很乏味，而且很可能会错过很少的提供者。
使用ResourceConfig类型可以执行的操作是，您可以在默认构造函数中使用packages方法来指定包含其余资源和提供程序的packages("")。对于Instance，我们假设我们有一个包com.test.poc.rest，其中包含所有其他服务，另一个包com.test.poc.providers，那么我们的resourceConig将如下所示：
public class CustomResourceConfig extends ResourceConfig{
public CustomResourceConfig(){
super();
packages("com.test.poc.rest;com.test.poc.providers");
//register any custom features
register(JacksonFeature.class); // enabling JSON feature.
}
}
and boom jersey现在将扫描您使用@Path注释的网络服务以及使用@Provider注释的提供商。