XML到pojojava

我读过其他与这个问题相关的帖子，但我无法解决我的问题。我尝试将以下XML字符串转换为JAVA类，但当我尝试使用

getParam1（）

方法访问param1时，它返回null，我不确定原因

XML字符串：

<?xml version="1.0" encoding="utf-8"?>
<REQUERYTRXRESPONSE xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/">
 <param1>3gbahtJf1y85Oks4HrPLkqTQZV8Yg8pIhdXOrZ8pLGJP3FLwqKlIzIl/GgUpGvFaw4MC4SV+4pCudmVq+apIMIJJS4PrVyUx4T0ZO/Tsui4ZqCn62dLAG0DVhBVz2ZasF4yr7CRYnk47FWS0RywXmA==</param1>
 <param2>lO4ismiJwsvBiHQGW/UwCA==</param2>
 <param3 />
</REQUERYTRXRESPONSE>

XML到Java类代码：

HttpRequest httpRequest = HttpRequest.get();

    if (httpRequest.ok()) {
        String response = httpRequest.body();

        System.out.println(response);

        JAXBContext jaxbContext = JAXBContext.newInstance(REQUERYTRXRESPONSE.class);
        Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
        REQUERYTRXRESPONSE requerytrxresponse = (REQUERYTRXRESPONSE) unmarshaller.unmarshal(new StringReader(response));


        System.out.println((String) requerytrxresponse.getParam1()); // returns null
    }   

---

我设法弄明白了

@XmlRootElement(name = "REQUERYTRXRESPONSE")
@XmlAccessorType(XmlAccessType.FIELD)
public class Response {

   private String param1;
   private String param2;
   private String param3;

   public String getParam1() {
      return param1;
   }

   public void setParam1(String param1) {
      this.param1 = param1;
   }

   public String getParam2() {
      return param2;
   }

   public void setParam2(String param2) {
      this.param2 = param2;
   }

   public String getParam3() {
      return param3;
   }

   public void setParam3(String param3) {
      this.param3 = param3;
   }

}

执行

@XxmlAccessorType

时，不需要指定

@xmlement

，除非需要

required=true

部分

我改变的是，我将命名空间从

包info.java

类中的

@XmlRootElement

移动，如下所示：

@javax.xml.bind.annotation.XmlSchema(namespace = "http://tempuri.org/",
        elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package com.sfatandrei.soplayground.model;

我的主要测试方法包括：

  final InputStream resourceAsStream = SoPlaygroundApplication.class.getClassLoader().getResourceAsStream("test.xml");
  JAXBContext jaxbContext = JAXBContext.newInstance(Response.class);
  Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
  Response response = (Response) unmarshaller.unmarshal(resourceAsStream);
  System.out.println(response);

---

对我来说，它工作得很好。确保编码正确，并检查jaxb提供程序。我使用默认的sun实现com.sun.xml.bind.v2.runtime.JAXBContextImpl对其进行了测试

对解组代码进行测试：

@Test
public void testUnmarshaller() throws JAXBException, IOException {
    final InputStream expectedXmlResource = getClass().getResourceAsStream("/REQUERYTRXRESPONSE.xml");
    StringWriter stringWriter = new StringWriter();
    IOUtils.copy(expectedXmlResource, stringWriter, "UTF-8");

    JAXBContext jaxbContext = JAXBContext.newInstance(REQUERYTRXRESPONSE .class);
    Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
    REQUERYTRXRESPONSE requerytrxresponse = (REQUERYTRXRESPONSE) unmarshaller.unmarshal(new StringReader(stringWriter.toString()));

    assertEquals(requerytrxresponse.getParam1(), "3gbahtJf1y85Oks4HrPLkqTQZV8Yg8pIhdXOrZ8pLGJP3FLwqKlIzIl/GgUpGvFaw4MC4SV+4pCudmVq+apIMIJJS4PrVyUx4T0ZO/Tsui4ZqCn62dLAG0DVhBVz2ZasF4yr7CRYnk47FWS0RywXmA==");
}

---

您能否将响应打印到控制台，以检查它是否具有正确的XML内容？这将是我要检查的第一件事。我想你需要为setters添加注释。@shmosel我不认为so@TimBiegeleisen上面的xml字符串是将响应打印到控制台的结果。我从控制台复制它。只是一个提示：将来，简单地从上下文创建封送拆收器，从类实例化一个对象，将其封送到一个文件中。通过这种方式，您可以查看类定义的XML，然后处理它们之间的差异。实际上，您不需要任何注释，除非您想要非默认行为。或者，您也可以简单地将名称空间声明复制到元素中。问题是，您的类没有反映xml：类说“元素没有名称空间”，但xml定义了

http://tempuri.org/

。@FlorianSchaetz，你是对的，但是从可读性和可维护性的角度来看，包-info.java是一种更简单的方法。@FlorianSchaetz谢谢，这很有帮助

@Test
public void testUnmarshaller() throws JAXBException, IOException {
    final InputStream expectedXmlResource = getClass().getResourceAsStream("/REQUERYTRXRESPONSE.xml");
    StringWriter stringWriter = new StringWriter();
    IOUtils.copy(expectedXmlResource, stringWriter, "UTF-8");

    JAXBContext jaxbContext = JAXBContext.newInstance(REQUERYTRXRESPONSE .class);
    Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
    REQUERYTRXRESPONSE requerytrxresponse = (REQUERYTRXRESPONSE) unmarshaller.unmarshal(new StringReader(stringWriter.toString()));

    assertEquals(requerytrxresponse.getParam1(), "3gbahtJf1y85Oks4HrPLkqTQZV8Yg8pIhdXOrZ8pLGJP3FLwqKlIzIl/GgUpGvFaw4MC4SV+4pCudmVq+apIMIJJS4PrVyUx4T0ZO/Tsui4ZqCn62dLAG0DVhBVz2ZasF4yr7CRYnk47FWS0RywXmA==");
}