java Jersey GenericEntity不工作

Question

我使用Jersey的GenericEntity以json的形式返回一个列表

但是我得到了一个例外

A message body writer for Java type, class java.util.Arrays$ArrayList, and MIME media type, application/xml, was not found
16-May-2011 11:16:31 com.sun.jersey.spi.container.ContainerResponse traceException
SEVERE: Mapped exception to response: 500 (Internal Server Error)....

我知道这意味着Jersey没有正确地映射到json

我需要在哪里向泽西提供更多信息。我没有用Maven

破译的代码是

List<String> list = Arrays.asList("test", "as");
return new GenericEntity<List<String>>(list) {};

Answer 1

GenericEntity以这种方式嵌入到响应中：

public Response get() {
    List<String> list = Arrays.asList("test", "as");
    return Response.ok(new GenericEntity<List<String>>(list) {}).build();
}