Java 解组错误Jaxb-“类没有默认的无参数构造函数”,而有默认的无参数构造函数
我正在尝试解组以下XML,但得到一个异常:1个IllegalAnnotationExceptions计数EntityVersionInfo没有无参数默认构造函数。尽管实际上有一个无参数构造函数。我错过了什么 XML: 111111 1. 带有注释的Java实体: TopLevelObject:Java 解组错误Jaxb-“类没有默认的无参数构造函数”,而有默认的无参数构造函数,java,xml,constructor,jaxb,Java,Xml,Constructor,Jaxb,我正在尝试解组以下XML,但得到一个异常:1个IllegalAnnotationExceptions计数EntityVersionInfo没有无参数默认构造函数。尽管实际上有一个无参数构造函数。我错过了什么 XML: 111111 1. 带有注释的Java实体: TopLevelObject: @XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name = "topLevelObject") public class TopLevelO
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "topLevelObject")
public class TopLevelObject {
@XmlElement(name = "entityVersionInfo")
private EntityVersionInfo versionInfo;
public TopLevelObject() {
//no args constructor
}
//GETTERS AND SETTERS HERE...
}
EntityVersionInfo:
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "entityVersionInfo")
public class EntityVersionInfo {
@XmlElement(name = "id")
private String id;
@XmlElement(name = "version")
private String version;
public EntityVersionInfo() {
//no arg constructor
}
//GETTERS AND SETTERS
}
将此添加到EntityVersionInfo
@Override
public String toString() {
return "EntityVersionInfo [id=" + id + ", version=" + version + "]";
}
将此添加到TopLevelObject
@Override
public String toString() {
return "TopLevelObject [versionInfo=" + versionInfo + "]";
}
运行此测试时,我得到:
JAXBContext context = JAXBContext.newInstance(TopLevelObject.class);
Unmarshaller u = context.createUnmarshaller();
Reader reader = new StringReader(
"<topLevelObject>\r\n" +
" <entityVersionInfo>\r\n" +
" <id>111111</id>\r\n" +
" <version>1</version>\r\n" +
" </entityVersionInfo>\r\n" +
"</topLevelObject>");
Object o = u.unmarshal(new InputSource(reader ));
System.out.println(o);
所以您的实体代码是好的,也许您的项目中有不止一个EntityVersionInfo类或其他类,但实体是好的。Whelp。。。这很尴尬。原来我的项目中还有一个EntityVersionInfo类。谢谢没什么好羞愧的,有时候显而易见的事情是最难找到的。
TopLevelObject [versionInfo=EntityVersionInfo [id=111111, version=1]]