利用dom4j解析XML文档
导入dom4j.jar包
2.创建XML文件books.xml
<?xml version="1.0" encoding="UTF-8"?> <books> <book id="001"> <title>THIS IS TITLE[1]</title> <author>AUTHOR[1]</author> </book> <book id="002"> <title>THIS IS TITLE[2]</title> <author>AUTHOR[2]</author> </book> </books>
3.可以利用Java代码创建XML文档
package per.lx.test;
import java.io.File;
import java.io.FileOutputStream;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
public class DemoCreate {
public static void main(String[] args) throws Exception {
Document doc = DocumentHelper.createDocument();
//生成根节点
Element books = doc.addElement("books");
//注意这里Element的对象的方法是用父节点调用addElement方法，生成子节点
Element book1 = books.addElement("book");
Element title1 = book1.addElement("title");
Element author1 = book1.addElement("author");
Element book2 = books.addElement("book");
Element title2 = book2.addElement("title");
Element author2 = book2.addElement("author");
book1.addAttribute("id", "001");
title1.setText("THIS IS TITLE[1]");
author1.setText("AUTHOR[1]");
book2.addAttribute("id", "002");
title2.setText("THIS IS TITLE[2]");
author2.setText("AUTHOR[2]");
OutputFormat format = OutputFormat.createPrettyPrint();
format.setEncoding("UTF-8");
File file = new File("D:"+File.separator+"books.xml");
XMLWriter writer = new XMLWriter(new FileOutputStream(file),format);
writer.write(doc);
}
}4.利用java代码获取，解析XML内容
package per.lx.test;
import java.io.File;
import java.util.List;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
public class DemoRead {
public static void main(String[] args) throws Exception {
SAXReader reader = new SAXReader();
File file = new File("D:/books.xml");
Document document = reader.read(file);
Element root = document.getRootElement();
List<Element> childElements = root.elements();
for (Element child : childElements) {
//这是不知道节点名字的情况下，知道节点名字参见ＰＳ
List<Attribute> attributeList = child.attributes();
for (Attribute attr : attributeList) {
System.out.println(attr.getName() + ": " + attr.getValue());
}
System.out.println("-----上面是得到ID-----");
List<Element> elementList = child.elements();
for (Element ele : elementList) {
System.out.println(ele.getName() + ": " + ele.getText());
}
System.out.println("-----上面是得到数据-----");
}
}
}ＰＳ：上面获取是在不知道节点名字的情况下进行获取
List<Element> childElements = root.elements();
for (Element child : childElements) {
//获取book标签属性的值用attributeValue
System.out.println("id:"+child.attributeValue("id"));
//获取便签的Text用elementText
System.out.println("title:" + child.elementText("title"));
System.out.println("author:" + child.elementText("author"));
System.out.println();
}以上只是对解析出来的结果进行一个输出，知道节点为id，title和author的情况下可以用此方法
