/**
* 显示决策树
*
* @param node 待显示的节点
* @param blankNum 行空格符，用于显示树型结构
*/
private void showDecisionTree(AttrNode node, int blankNum) {
System.out.println();
for (int i = 0; i < blankNum; i++) {
System.out.print("\t");
}
System.out.print("--");
// 显示分类的属性值
if (node.getParentAttrValue() != null && node.getParentAttrValue().length() > 0) {
System.out.print(node.getParentAttrValue());
} else {
System.out.print("--");
}
System.out.print("--");
if (node.getChildDataIndex() != null && node.getChildDataIndex().size() > 0) {
String i = node.getChildDataIndex().get(0);
System.out.print("类别:" + data[Integer.parseInt(i)][attrNames.length - 1]);
System.out.print("[");
for (String index : node.getChildDataIndex()) {
System.out.print(index + ", ");
}
System.out.print("]");
} else {
// 递归显示子节点
System.out.print("【" + node.getAttrName() + "】");
for (AttrNode childNode : node.getChildAttrNode()) {
showDecisionTree(childNode, 2 * blankNum);
}
}
}
