Question

我使用Thymeleaf作为UI框架，使用Java作为后端，我正在创建一个休息Web服务。使用JAXB从URL解组xml。我认为我的控制器弄乱了一些东西，这就是我无法打印完整列表的原因。

XML

<results>
    <rootNode>
        <node>1336</node>
        <state>CL</state>
        <time>0</time>
        <ip_addresses>
             <ip_address type="DOC">06:56:43.0</ip_address>
             <ip_address type="PE">06:56:43.0</ip_address>
        </ip_addresses>
        <lease_date>2017-01-25</lease_date>
    </rootNode>
</results>

控制器

经过多次测试后，我缩小了问题的原因是在我的控制器中。

@Controller
public class IndexController {

@Autowired
JAXSample index;

@RequestMapping(value = "/getDetails", method = RequestMethod.POST)
    public ModelAndView getDetails(Info  info) throws MalformedURLException {

    ModelAndView model = new ModelAndView("getDetails");

    //JAXSample index = new JAXSample();
    readingXml cinfo = index.readXML(info.getInputMacAddress());
    model.addObject("cinfo", cinfo);


    System.out.println(cinfo.getip_Addresses().toString() + "FROM CONTROLLER");


    return model;
}

 //****Should be [06:56:43.0, 06:56:43.0] ******
 Output: [06:56:43.0, ] FROM FROM CONTROLLER

JaxSample.class

jaxb示例找到@ example

public readingXml readXML(String MAC) throws MalformedURLException {
results customer = null;
 readingXml  = null;
  try {
      JAXBContext jaxbContext  = JAXBContext.newInstance(results.class);
      URL url = new URL("some type of url for xml page" + MAC);

      HttpURLConnection http = (HttpURLConnection) url.openConnection(); 
      http.addRequestProperty("User-Agent", "Mozilla/4.76"); 
      InputStream is = http.getInputStream();
      Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
      customer = (results) jaxbUnmarshaller.unmarshal(is);
      List<readingXml> readingXml = customer.getReadingXml();
      readingXml = readingXmls.get(0);
  } catch (JAXBException e) {
      e.printStackTrace();
  } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
  return readingXml;
}

因此，出于测试目的，我尝试打印出列表值。

 System.out.println(readingXml.ip_Addresses().toString() + "FROM SAMPLE");
   //****Should be [06:56:43.0, 06:56:43.0] ******
  //output [06:56:43.0, ] FROM SAMPLE

BUT !!当我将相同的确切代码复制到我的 main.class 中并执行相同的请求时。

  System.out.println(readingXml.ip_Addresses().toString() + "FROM MAINCLASS");
  //output [06:56:43.0, 06:56:43.0] FROM MAINCLASS

我得到了我想要的价值观。为什么在JAXB或我的控制器中这不起作用？

为什么ModelAndView只打印列表的第一个索引？

0 个答案: