java 3 次 IllegalAnnotationExceptions
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3 counts of IllegalAnnotationExceptions
提问by Sami
I have never used JAXB before. I am working on a test harnesses project. I have around 20 different testcases. When I run my test, I get this error.
我以前从未使用过 JAXB。我正在研究一个测试工具项目。我有大约 20 个不同的测试用例。当我运行测试时，出现此错误。
My structure is like:
我的结构是这样的：
Ais the base TestCase class.
A是基本的 TestCase 类。
Bextends A.
B延伸A。
Cextends B.
C延伸B。
Base Class A:
基类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;
}
}
Class B:
B类：
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;
}
}
Class C:
C类：
@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;
}
}
and for unmarshalling my xml files i wrote
为了解组我写的 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;
}
my xml file looks like:
我的 xml 文件看起来像：
<C>
<aData> aaaa </aData>
<bData> bbbb </bData>
<cData> cccc </cData>
</C>
when i run my code i get 3 counts of IllegalAnnotationException.
当我运行我的代码时，我得到了 3 个 IllegalAnnotationException 计数。
回答by bdoughan
The IllegalAnnotationExceptions are due to you not having default zero-arg constructors on A, B, and C.
IllegalAnnotationExceptions 是由于您在 A、B 和 C 上没有默认的零参数构造函数。
Add to A:
添加到A：
public A() {
}
Add to B:
添加到B：
public B() {
}
And add to C:
并添加到 C：
public C() {
}
回答by BinDev
This is because the sub-elements of that class you are creating JAXBcontext instance ,doesn't have the same name as of the element names defined inside it.
这是因为您正在创建 JAXBcontext 实例的该类的子元素与其中定义的元素名称不具有相同的名称。
Example:
例子：
@XmlType(name = "xyz", propOrder =
{ "a", "b", "c", "d" })
@XmlRootElement(name = "testClass")
public class TestClass
{
@XmlElement(required = true)
protected Status status;
@XmlElement(required = true)
protected String mno;
@XmlElement(required = true)
}
In the above class you don't have "xyz" , but if you will put the property name that is not available JAXBContext instantiation throws IlligalAnnotationException.
在上面的类中，您没有 "xyz" ，但是如果您将放置不可用的属性名称，则 JAXBContext 实例化会抛出 IlligalAnnotationException。
Like that you have 3 places name mismatch. So 3 counts of IllegalAnnotationExceptions .
就像你有 3 个地名不匹配。所以 3 个 IllegalAnnotationExceptions 计数。
