使用Response参数的方法中的IllegalStateException

Question

我写了一个简单的类来测试响应读取实体方法(如果它按预期工作).但它没有奏效.

当我启动课程时,我收到以下错误response.readEntity():

Exception in thread "main" java.lang.IllegalStateException: Method not supported on an outbound message.  
  at org.glassfish.jersey.message.internal.OutboundJaxrsResponse.readEntity(OutboundJaxrsResponse.java:150)

这是我写的代码

public static void main(String[] args) {
        List<Entity> representations = new ArrayList<>();
        representations.add(new Entity("foo", "baz", false));
        representations.add(new Entity("foo1", "baz1", true));
        representations.add(new Entity("foo2", "baz2", false));
        Response build = Response.ok(representations).build();
        printEntitesFromResponse(build);
    }

public static void printEntitesFromResponse(Response response) {
        response
                .readEntity(new GenericType<List<Entity>>() {})
                .stream()
                .forEach(entity -> System.out.println(entity));
    }

我究竟做错了什么？

Answer 1

Response虽然它们仍然使用相同的接口,但有两种类型的es,inbound和outbound.出站是指从服务器发送响应

Response response = Response.ok(entity).build();

入站是在客户端收到响应时.

Response response = webTarget.request().get();

readEntity在服务器端出站响应上禁用该方法,因为您不需要它.它仅在您需要_de_serialize响应流的响应时使用.但是当它出站时没有.

如果您希望实体出站响应,请使用 Response#getEntity()