package com.rlovep.dom4j;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.Text;
import org.dom4j.io.SAXReader;
import org.hamcrest.core.IsInstanceOf;
import org.junit.Test;
/**
*
* @ClassName: ReadXml
* @Description: TODO(这里用一句话描述这个类的作用)
* @author peace w_peace@163.com
* @date 30 Sep 2015 10:46:08 am
*
*/
public class ReadXml {
private List<Element> list=new ArrayList<Element>();
/**
*
* @Title: readnode
* @Description: 获取所有节点,只得到一层节点
* :void
* @throws
* @author peace w_peace@163.com
*/
@Test
public void readFirstnode(){
try {
//1.读取xml文档，返回Document对象
SAXReader reader =new SAXReader();
Document doc=reader.read(new File("./src/student.xml"));
//得到当前文档的所有子节点对象(不包含孙以下的节点)
Iterator<Node> it=doc.nodeIterator();
while(it.hasNext()){
Node node=it.next();
String name=node.getName();
System.out.println(name+"----");
//判断节点是否为标签，如果为标签就得到标签下的子节点；
if(node instanceof Element){
//获得标签下的子节点
Iterator<Node> it2=((Element) node).nodeIterator();
while(it2.hasNext()){
Node el=it2.next();
System.out.println(el.getName());
}
}
}
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
*
* @Title: readAllNide
* @Description: 获得所有标签
* @return:void
* @throws
* @author peace w_peace@163.com
*/
@Test
public void readAllNide(){
try {
//读取xml文档
SAXReader reader=new SAXReader();
Document doc=reader.read("./src/student.xml");
//获得根标签
Element rootELem=doc.getRootElement();
//获得根标签下的所有标签，并保存到list中
getChildNodes(rootELem);
System.out.println(list);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
*
* @Title: getChildNodes
* @Description: 获得传入标签的子标签
* @param elem
* @throws
* @author peace w_peace@163.com
*/
private void getChildNodes(Element elem){
//保持标签
list.add(elem);
System.out.println(elem.getName());
Iterator<Node> it=elem.nodeIterator();
while(it.hasNext()){
Node node=it.next();
//如果节点为标签，进行递归
if(node instanceof Element){
getChildNodes((Element)node);
}
}
}
/**
*
* @Title: getElement
* @Description: 获得所有标签；（将输入参数改为url）
* @return:void
* @throws
* @author peace w_peace@163.com
*/
@Test
public void getElement(){
try {
//读取xml文档
SAXReader reader=new SAXReader();
Document doc=reader.read("./src/student.xml");
//获得根标签
Element rootElem=doc.getRootElement();
//得到标签名称
String rootName=rootElem.getName();
System.out.println("root>>>>"+rootName);
//得到当前标签下指定标签的第一个标签
Element firstElembyname=rootElem.element("student");
System.out.println("first>>>"+firstElembyname.getName());
//得到当前标签下所有指定的标签
Iterator<Element> elem=rootElem.elementIterator("student");
while(elem.hasNext()){
Element e=elem.next();
System.out.println("elementIterator>>"+e.getName());
}
//5得到当前标签下的所有子标签
List<Element> elements = rootElem.elements();
for(Element e:elements){
System.out.println("elements>>"+e.getName());
}
//或者重复式样获得想要的标签：
Element nameElem=doc.getRootElement().element("student").element("name");
System.out.println("name>>"+nameElem.getName());
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
*
* @Title: getAttribut
* @Description: 获取属性
* @return:void
* @throws
* @author peace w_peace@163.com
*/
@Test
public void getAttribut(){
try {
//读取xml文档
SAXReader reader=new SAXReader();
Document doc=reader.read("./src/student.xml");
//获得sudent标签
Element student=doc.getRootElement().element("student");
//得到指定名称的属性值
String idvalue = student.attributeValue("id");
System.out.println("idvalue1>>"+idvalue);
//得到指定名称的属性
Attribute attribute = student.attribute("id");
System.out.println("idvalue2>>"+attribute.getValue());
//得到标签的所有属性
List<Attribute> attributes = student.attributes();
for(Attribute a:attributes){
System.out.println("attributes>>"+a.getName()+":"+a.getValue());
}
// 得到所有属性对象，返回迭代器
Iterator<Attribute> it = student.attributeIterator();
while(it.hasNext()){
Attribute attr = it.next();
System.out.println(attr.getName()+"="+attr.getValue());
}
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
*
* @Title: getText
* @Description: 获得指定标签
* @return:void
* @throws
* @author peace w_peace@163.com
*/
@Test
public void getText(){
try {
//读取xml文档
SAXReader reader=new SAXReader();
Document doc=reader.read("./src/student.xml");
//获得sudent标签
Element student=doc.getRootElement().element("student");
//获得student的文本
String text = student.getText();
System.out.println("student>>"+text);
//获得指定标签的文本
Element name=student.element("name");
System.out.println("name1>>"+name.getText());
//获得指定子标签的文本
String elementText = student.elementText("name");
System.out.println("name2>>"+elementText);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
SAXReader reader=new SAXReader();
try {
Document doc=reader.read(new File("./src/student.xml"));
System.out.println(doc);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}