RESTful Web服务：如何在Java中设置标头以接受Access-Control-Allow-Origin允许的XMLHttpRequest

在这里阅读有关您的问题CORS的信息：http : //enable-
cors.org/

检查此方法是否对您的getMsg（）方法有帮助：

return Response.ok(output).header("Access-Control-Allow-Origin","*").build();

如果上述方法不起作用，请尝试将Jersey过滤器添加到您的服务中。创建过滤器类：

package your.package;public class CORSFilter implements ContainerResponseFilter {    @Override    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;    }}

并稍后注册win web.xml：

<servlet><servlet-name>CORS Filter</servlet-name><servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class> <init-param>    <param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>    <param-value>your.package.CORSFilter</param-value> </init-param></servlet><servlet-mapping>    <servlet-name>CORS Filter</servlet-name>    <url-pattern>/webservices/*</url-pattern></servlet-mapping>

另一个解决方案是在资源中使用此代码来提供

OPTIONS

  @OPTIONS  @Path("/getsample")  public Response getOptions() {    return Response.ok()      .header("Access-Control-Allow-Origin", "*")      .header("Access-Control-Allow-Methods", "POST, GET, PUT, UPDATE, OPTIONS")      .header("Access-Control-Allow-Headers", "Content-Type, Accept, X-Requested-With").build();  }

如果没有这项工作，请尝试将

"*"

http://localhost::8080

("Access-Control-Allow-Origin", "http://localhost:8080")

"*"