我正在开发一个 eclipse rcp 项目,我需要从 TreeStructured Java 对象中创建一个 treeviewer。目前我已经硬编码了 Java 对象来创建结构,并且工作正常。我需要创建一个计算所有父母和孩子对象并形成树结构的方法。它应该是一种递归方法。我写了一个递归方法来生成一个树形结构的java对象。但它不能正常工作。我不知道问题到底出在哪里。请求您对此提供帮助。请在下面找到代码。
private FileParent getInput() {
FileParent root = new FileParent("Root");
FileParent A = new FileParent("A");
FileParent a1 = new FileParent("A1");
FileObject a11 = new FileObject("A11");
a1.addChild(a11);
FileObject a2 = new FileObject("A2");
A.addChild(a1);
A.addChild(a2);
FileParent b = new FileParent("B"); FileObject b1 = new
FileObject("B1"); FileObject b2 = new FileObject("B2");
b.addChild(b1); b.addChild(b2);
root.addChild(A);
// root.addChild(b);
return root;
}
我的递归方法是遍历所有父对象和子对象并创建树结构对象。
FileParent root1 = new FileParent("Root");
public FileParent getChildren(FileParent root) {
if (!root.hasChildren()) {
return root;
}
if (root != null && root.hasChildren()) {
FileObject[] children = root.getChildren();// size two
for (FileObject fileObject : children) { // 2 times
// here children will be the folders
if (fileObject instanceof FileParent) {
FileParent folder = (FileParent) fileObject;
// root1.setParent(folder.getParent());
// if (root1.getParent() != null) {
root1.addChild(folder);
// }
getChildren((FileParent) folder);
} else {
System.out.println("FileName: " + fileObject.getName());
// root1.setParent(fileObject.getParent());
// if (root1.getParent() != null) {
root1.addChild(fileObject);
// }
}
}
}
return root1;
}
公共类文件对象 {
private String name;
private FileParent parent;
public FileObject(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setParent(FileParent parent) {
this.parent = parent;
}
public FileParent getParent() {
return parent;
}
public String toString() {
return getName();
}
}
公共类 FileParent 扩展 FileObject { /** * */
private List<FileObject> children;
public FileParent(String name) {
super(name);
children = new ArrayList<FileObject>();
}
public void addChild(FileObject child) {
// if (children.contains(child)) {
children.add(child);
child.setParent(this);
// }
}
public void removeChild(FileObject child) {
children.remove(child);
child.setParent(null);
}
public FileObject[] getChildren() {
return (FileObject[]) children.toArray(new FileObject[children.size()]);
}
public boolean hasChildren() {
return children.size() > 0;
}
}