问题描述
在您的Dir
类中,您没有指定集合的类型,这就是JAXB添加xsi:type
属性的原因。
你有:
@XmlElement(name = "dir")
private ArrayList dirs;
如果您ArrayList
要包含的实例,Dir
则可以执行以下操作:
@XmlElement(name = "dir")
private ArrayList<Dir> dirs = null;
如果由于某种原因您不想在集合中指定类型,则可以在@XmlElement
批注中进行指定:
@XmlElement(name = "dir", type=Dir.class)
private ArrayList dirs = null;
解决方法
我使用JAXB创建文件夹和文件层次结构
我的模特:
@XmlRootElement
public class Root {
@XmlAttribute
private String path;
@XmlElement(name = "dir")
private ArrayList<Dir> rootContentDirs = null;
@XmlElement(name = "file")
private ArrayList<FileObj> rootContentFiles = null;
public void setRootContentDirs(ArrayList<Dir> rootContentDirs) {
this.rootContentDirs = rootContentDirs;
}
public void setRootContentFiles(ArrayList<FileObj> rootContentFiles) {
this.rootContentFiles = rootContentFiles;
}
public void setPath(String path) {
this.path = path;
}
}
public class Dir {
@XmlAttribute
private String name;
@XmlElement(name = "dir")
private ArrayList dirs = null;
@XmlElement(name = "file")
private ArrayList files = null;
public void setName(String name) {
this.name = name;
}
public void setDirs(ArrayList dirs) {
this.dirs = dirs;
}
public void setFiles(ArrayList files) {
this.files = files;
}
}
public class FileObj{
@XmlAttribute
private String name;
@XmlAttribute
private long size;
@XmlAttribute
private String type;
public void setName(String name) {
this.name = name;
}
public void setSize(long size) {
this.size = size;
}
public void setType(String type) {
this.type = type;
}
}
我想制作目录和文件树:
public class XmlByJaxb extends Generator {
private static final String JAXB_XML = "./jaxb.xml";
private static Root root = null;
@Override
public void output() throws IOException {
JAXBContext context = null;
Marshaller m = null;
try {
context = JAXBContext.newInstance(Root.class,Dir.class,FileObj.class);
m = context.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,Boolean.TRUE);
m.marshal(root,new File(JAXB_XML));
} catch (JAXBException e) {
}
}
@Override
public void run() {
ArrayList<FileObj> rootFiles = addFiles(dir);
ArrayList<Dir> rootDirs = make(dir);
root = new Root();
root.setPath(dir.getPath());
root.setRootContentFiles(rootFiles);
root.setRootContentDirs(rootDirs);
/.../
}
但是我在生成的xml中有一个奇怪的“ xsi:type”和“ xmlns:xsi”:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root path="/home/phlamey/IdeaProjects/FileUtillite">
<dir name="src">
<dir xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="dir" name="test">
<dir xsi:type="dir" name="java">
/.../
所以我的问题是:这是什么意思,如何删除?