IllegalAnnotationExceptions的3个计数

Question

我之前从未使用过JAXB.我正在研究测试工具项目.我有大约20个不同的测试用例.当我运行我的测试时,我收到此错误.

我的结构如下:

A 是TestCase的基类.

B延伸A.

C延伸B.

基础A:

public class A {
  public A(String t){
     testName = t;
  }

  private String aData;
  private String testName;
  public void setAData(String a){
     aData = a;
  }

  public void getAData(){
     return aData;
  }

  public void setTestName(String t){
     testName = t;
  }

  public void getTestName(){
     return testName;
  }
}

B级:

public class B extends A{ 
   public B(String testName){
      super(testName);
   }

   private String bData;
   public void setBData(String b){
      bData = b.trim();
   }
   public String getData(){
      return bData;
   }       
}

C级:

@XmlRootElement(name="C")
public class C extends B{
    public C(String testName){
        super(testName);
    }

    private String cData;
    public void setCData(String c){
        cData = c;
    }
    public String getCData(){
        return cData;
    }
}

并为我编写的解组我的xml文件

public C unmarshall(C test, String dir){
    try {
        JAXBContext jc = JAXBContext.newInstance(c.getClass);
        Unmarshaller u = jc.createUnmarshaller();

        test = (C)u.unmarshal(new FileInputStream(dir));
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }

    return test;
 }

我的xml文件如下:

<C>
   <aData> aaaa </aData>
   <bData> bbbb </bData>
   <cData> cccc </cData>
</C>

当我运行我的代码时,我得到3个IllegalAnnotationException计数.

Answer 1

IllegalAnnotationExceptions是由于您在A,B和C上没有默认的零arg构造函数.

添加到A:

public A() {
}

加至B:

public B() {
}

并添加到C:

public C() {
}