java JAXB：XmlElementWrapper 嵌套节点
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JAXB : XmlElementWrapper nested nodes
提问by Jimmy
I want to Generate XML that look like this :
我想生成如下所示的 XML：
<mainNode>
<node1></node1>
<node2></node2>
</mainNode>
<mainNode2></mainNode2>
and this is how i generate the mainNode1 , mainNode2 and node1 in my code:
这就是我在代码中生成 mainNode1 、 mainNode2 和 node1 的方式：
@XmlElementWrapper(name = "mainNode")
@XmlElement(name = "node1")
public List<String> getValue() {
return value;
}
@XmlElement(name = "mainNode2")
public String getValue2() {
return value2;
}
how i could add node2 to the mainNode1 ?
我如何将 node2 添加到 mainNode1 ？
采纳答案by limc
You don't seem to have a root element in your example. You could do something like this to obtain the structure you want:-
您的示例中似乎没有根元素。你可以做这样的事情来获得你想要的结构：-
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement
class Node {
private MainNode mainNode;
private MainNode2 mainNode2;
public Node() {
}
public Node(MainNode mainNode, MainNode2 mainNode2) {
this.mainNode = mainNode;
this.mainNode2 = mainNode2;
}
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement
class MainNode {
private String node1;
private String node2;
public MainNode() {
}
public MainNode(String node1, String node2) {
this.node1 = node1;
this.node2 = node2;
}
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement
class MainNode2 {
}
Here's my test code:-
这是我的测试代码：-
JAXBContext jc = JAXBContext.newInstance(Node.class);
Marshaller m = jc.createMarshaller();
MainNode mainNode = new MainNode("node1 value", "node2 value");
MainNode2 mainNode2 = new MainNode2();
Node node = new Node(mainNode, mainNode2);
StringWriter sw = new StringWriter();
m.marshal(node, sw);
System.out.println(sw.toString());
... and here's the printout:-
...这是打印输出：-
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<node>
<mainNode>
<node1>node1 value</node1>
<node2>node2 value</node2>
</mainNode>
<mainNode2/>
</node>
回答by Kanagavelu Sugumar
XmlElementWrapper should be used only when the wrapperElement has a list of same type of elements.
仅当 wrapperElement 具有相同类型元素的列表时，才应使用 XmlElementWrapper。
<node>
<idList>
<id> value-of-item </id>
<id> value-of-item </id>
....
</idList>
</node>
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement
class Node {
@XmlElementWrapper(name = "idList")
@XmlElement(name = "id", type = String.class)
private List<String> ids = new ArrayList<String>;
//GETTERS/SETTERS
}
