javax.xml.bind.UnmarshalException：意外元素（uri：“”，本地：“ TestSubject”）。预期的元素是<{} Test>

Question

有几个与此问题有关的帮助主题，但我还没有找到解决我的问题的解决方案。感谢您为解决问题提供的指导。

我尝试通过元帅生成xml，而xml以下是从代码生成的内容。

我必须使用下面的xml结构：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Test>
    <testSubject>
        <firstName>test1</firstName>`enter code here`
        <lastNAme>lastname</lastNAme>
        <ssn>123456</ssn>
    </testSubject>
</Test>

码

@XmlRootElement(name = "Test")
public class Test { 
      public Test()
      {
          testSubject = new ArrayList<TestSubject>();
      }

    List<TestSubject> testSubject;

    @XmlElement(name = "testSubject", type = TestSubject.class)         
    public List<TestSubject> getTestSubject() {
        return testSubject;
    }

    public void setTestSubject(List<TestSubject> testSubject) {
        this.testSubject = testSubject;
    }

TestSubject类

public class TestSubject {

    String firstName;
    String lastNAme;
    int ssn;

//getters and setters

}

//在我的主类中解组代码

JAXBContext jc = JAXBContext.newInstance(Test.class);

Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("c://testSubjects.xml");
Test tests = (Test) unmarshaller.unmarshal(xml);

例外

javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"TestSubject"). Expected elements are <{}Test>
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:662)

Answer 1

似乎您没有向我们展示您要解组的真实XML。如果您的XML格式为，则会出现您看到的错误

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<testSubject>
    <firstName>test1</firstName>
    <lastNAme>lastname</lastNAme>
    <ssn>123456</ssn>
</testSubject>

代替

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Test>
    <testSubject>
        <firstName>test1</firstName>
        <lastNAme>lastname</lastNAme>
        <ssn>123456</ssn>
    </testSubject>
</Test>

简单地纠正它。

正如stacktrace所说

javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"TestSubject"). Expected elements are <{}Test>

您正在获得一个<testSubject>期望<Test>节点的节点。因为<Test>它是根节点，所以它就在其中。