您的JAXB（JSR-222）实现将为每个类创建映射（即TestGeneric，不是type（即TestGeneric<Integer>）。因此，它将value字段视为typeObject。这将导致xsi:type属性，因为JAXB实现正在添加足够的信息才能解组相同的类型。
@XmlAccessorType(XmlAccessType.NONE)
static class TestGeneric<T> {
@XmlAttribute public boolean isrequired;
@XmlElement public T value;
public TestGeneric() {
}
public TestGeneric(boolean isrequired) {
this.isrequired = isrequired;
}
}
下面是您可以使用的一种方法。我介绍了的子类TestGeneric来代表不同的可能类型。
package forum11192623;
import java.io.PrintWriter;
import java.io.StringWriter;
import javax.xml.bind.*;
import javax.xml.bind.annotation.*;
public class Demo {
public static void main(String[] args) {
try {
TestRoot root = new TestRoot();
root.name.value = "bobby";
root.age.value = 102;
root.color.value = "blue";
JAXBContext context = JAXBContext.newInstance(root.getClass());
Marshaller marsh = context.createMarshaller();
marsh.setProperty(Marshaller.JAXB_ENCODING,"UTF-8");
marsh.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,Boolean.TRUE);
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
marsh.marshal(root,pw);
System.out.println(sw.toString());
}
catch(Throwable t) {
t.printStackTrace();
}
}
@XmlRootElement
static class TestRoot {
@XmlElement public TestString name = new TestString(true);
@XmlElement public TestInteger age = new TestInteger(true);
@XmlElement public TestString color = new TestString(true);
}
@XmlAccessorType(XmlAccessType.NONE)
@XmlTransient
@XmlSeeAlso({TestInteger.class, TestString.class})
static class TestGeneric<T> {
@XmlAttribute
public boolean isrequired;
public T value;
public TestGeneric() {
}
public TestGeneric(boolean isrequired) {
this.isrequired = isrequired;
}
}
static class TestInteger extends TestGeneric<Integer> {
public TestInteger() {
}
public TestInteger(boolean b) {
super(b);
}
@XmlElement
public Integer getValue() {
return value;
}
public void setValue(Integer value) {
this.value = value;
}
}
static class TestString extends TestGeneric<String> {
public TestString() {
}
public TestString(boolean b) {
super(b);
}
@XmlElement
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}
}
602392714
清零编程群