2

这是我从 Android 调用的代码

    RESTClient rs = new RESTClient(WebServicePatterns.SERVICES_URL);
    rs.addParam("role_id", "6");
    try
    {
    rs.sendParams_receiveText();// Call WebService
    }

    rs.getResponse()

这是我的 RESTClient 的方法。

public void sendParams_receiveText() throws Exception 
{
    http_client = new DefaultHttpClient();
    http_post = new HttpPost(uri);
    http_post.setEntity(new UrlEncodedFormEntity(params));
    http_response = http_client.execute(http_post);
    http_entity = http_response.getEntity();

    response =  EntityUtils.toString(http_entity);
}

这是我的服务器端 Web 服务代码

@Produces("application/xml")
@Path("Services")
@Singleton
public class Services_Service
{
    public Services_Service()
    {

    }

@POST
@Path("getServices")
public List<ServicesBean> getServices(@FormParam("role_id") String role_id) 
{

    Services_DB db = new Services_DB();
    List<ServicesBean> services_data = db.myServices(role_id); 
    return services_data;
}

}

这是我的服务代码

.........
private TreeMap<Integer, ServicesBean>  servicesData    = new TreeMap<Integer, ServicesBean>();
.........

public List<ServicesBean> myServices(String role_id)
{

    List<ServicesBean> entireList = new ArrayList<ServicesBean>();
    ServicesBean bean = new ServicesBean();

    try
    {

        sql = "SELECT A,B,C from TESTTable where .......";

        rs = stmt.executeQuery(sql);

        if (rs != null && rs.next())
        {
            do
            {
                bean = new ServicesBean();

                bean.setService_id(rs.getString("A"));
                bean.setService_name(rs.getString("B"));
                bean.setService_short_name(rs.getString("C"));

                int id = servicesData.size();
                servicesData.put(id, bean);

            } while (rs.next());
        }

        entireList.addAll(servicesData.values());
    } 


    return entireList;

问题是我收到这样的错误。

7 Oct, 2013 5:08:05 PM com.sun.jersey.spi.container.ContainerResponse write
SEVERE: A message body writer for Java type, class java.util.ArrayList, and MIME media type, application/xml, was not found
7 Oct, 2013 5:08:05 PM com.sun.jersey.server.impl.application.WebApplicationImpl onException
SEVERE: Internal server error
javax.ws.rs.WebApplicationException
    at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:241)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:724)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:647)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:638)
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:309)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:425)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:590)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:619)

有人可以帮帮我吗。

4

3 回答 3

2

未找到 Java 类 java.util.ArrayList 和 Java 类型 java.util.ArrayList 和 MIME 媒体类型 application/xml 的消息正文
编写器 通过在类的开头添加 XmlRootElement 解决了问题（请参阅 jaxb 文档）（需要服务器类路径中的 jaxb-impl.jar 和 jaxb-api.jar）

导入 javax.xml.bind.annotation.XmlRootElement；

@XmlRootElement

于 2013-11-14T07:59:50.850 回答
1

错误消息告诉您，泽西岛不知道如何将您List的ServiceBean对象转换为有效的 xml。

您缺少的是像 JAXB 这样的对象编组器，它可以为您完成这项工作。

看看本教程的第 6 章。解释得很好。

于 2013-10-07T13:12:44.343 回答
0

那么一个简单的答案是。您不能直接将列表转换为 xml。您需要将列表放入类意味着使您的用户定义数据类型并将列表放入其中。

您可以将课程标记为@XmlRootElement

然后它将转换为 XML。

于 2015-02-18T14:28:51.243 回答