Question

我想在我的应用程序中为所有Jersey请求添加Access-Control-Allow-Origin标头。是否可以通过Jersey servlet执行此操作以使其适用于应用程序？

    ServletRegistration jerseyServletRegistration = ctx.addServlet("JerseyServlet", new ServletContainer());
    jerseyServletRegistration.setInitParameter("com.sun.jersey.config.property.packages", "com.production.resource");
    jerseyServletRegistration.setInitParameter("com.sun.jersey.api.json.POJOMappingFeature", "true");
    jerseyServletRegistration.setLoadOnStartup(1);
    jerseyServletRegistration.addMapping("/api/*");

Answer 1

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientRequest;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.filter.ClientFilter;

public final class JerseySample {

  public static void main(final String[] args) {
    final Client client = Client.create();

    client.addFilter(new ClientFilter() {

      @Override
      public ClientResponse handle(final ClientRequest request) {
        final Map<String, List<Object>> headers = request.getHeaders();

        final List<Object> valueList = new ArrayList<Object>();

        valueList.add("Sample Value");

        headers.put("Sample-Header", valueList);

        return getNext().handle(request);
      }

    });

    ...
  }

}

http://jersey.java.net/nonav/apidocs/latest/jersey/com/sun/jersey/api/client/filter/ClientFilter.html

Answer 2

Jersey 2.9.9（2019）使用标准的JAX-RS API：

 public override View GetView(int position, View convertView, ViewGroup parent)
     {
       ...   
       convertView = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.layout6, null);
       convertView.setLayoutParams(new AbsListView.LayoutParams(
              ViewGroup.LayoutParams.MATCH_PARENT, 300));//300 is your custom height
       ...
     }

我建议只使用一个过滤器实例，并使其成为线程安全。

Javadoc中有一条注释：

必须使用@Provider注释实现此接口的过滤器

似乎不是真的。

如何为所有Jersey请求添加标头

2 个答案: