//获取第一个p1里面的属性id1的值
public static void GetValue()throws Exception{
//1.创建解析器
SAXReader saxReader = new SAXReader();
//2.得到document
Document document = saxReader.read(PATH);
//3.得到根目录
Element rootElement = document.getRootElement();
//4.得到p1标签
Element p1 = rootElement.element("p1");
//5.得到属性id1的值
String id1 = p1.attributeValue("id");
System.out.println("id:" + id1);
}
//删除某个元素p1标签下的age标签
public static void DeleteAge() throws Exception{
//1.创建解析器
SAXReader saxReader = new SAXReader();
//2.得到Document
Document document = saxReader.read(PATH);
//3.得到根目录
Element root = document.getRootElement();
//4.得到P1标签
Element p1 = root.element("p1");
//5. 得到age标签
Element age = p1.element("age");
//6.删除age标签
p1.remove(age);
//7. 回写XML
OutputFormat format = OutputFormat.createCompactFormat();
XMLWriter xmlWriter = new XMLWriter(new FileOutputStream(PATH),format);
xmlWriter.write(document);
xmlWriter.close();
}
//修改第一个p1下面的name元素的值
public static void ChangeName() throws Exception{
//1.创建解析器
SAXReader saxReader = new SAXReader();
//2.得到Document
Document document = saxReader.read(PATH);
//3.得到根ELEMENT
Element root = document.getRootElement();
//4.得到p1
Element p1 = root.element("p1");
//5. 得到 p1标签下的name标签
Element name = p1.element("name");
//6.更改标签的值
//name.attributeValue("WangWu"); //错误的修改方式
name.setText("WangWu");
//7.回写XML
OutputFormat outputFormat = new OutputFormat();
XMLWriter xmlWriter = new XMLWriter(new FileOutputStream(PATH),outputFormat);
xmlWriter.write(document);
xmlWriter.close();
}
//在第一个p1下面的age标签之前添加<School>duchangerzhong</School>
public static void AddSchool() throws Exception{
//1. 创建解析器
SAXReader saxReader = new SAXReader();
//2.创建Document
Document document = saxReader.read(PATH);
//3.获取根Element
Element root = document.getRootElement();
//4.获取p1下所有的子元素
Element p1 = root.element("p1");
//5.获取p1下所有的子元素
List list = p1.elements();
//6.创建School元素
Element school = DocumentHelper.createElement("school");
school.setText("duchangerzhong");
//7.在指定位置插入元素
list.add(1,school);
//list.add(list.size() - 1,school); //在末尾添加元素
//回写XML
OutputFormat outputFormat = new OutputFormat();
XMLWriter writer = new XMLWriter(new FileOutputStream(PATH),outputFormat);
writer.write(document);
writer.close();
}
//在第一个p1标签末尾添加一个元素 <sex>nv</sex>
public static void AddLastSex() throws Exception{
//1. 创建解析器
SAXReader saxReader = new SAXReader();
//2. 创建Document
Document document = saxReader.read(PATH);
//3.获取根目录
Element root = document.getRootElement();
//4. 获取p1标签
Element p1 = root.element("p1");
//5.在p1标签内的末尾添加标签
Element sex = p1.addElement("Sex");
//6.给sex标签添加内容
sex.setText("nv");
//7.回写XML
OutputFormat outputFormat = new OutputFormat();
XMLWriter writer = new XMLWriter(new FileOutputStream(PATH),outputFormat);
writer.write(document);
writer.close();
}
//获取第二个name元素里面的值
public static void GetSecondValue() throws Exception{
//1.创建解析器
SAXReader saxReader = new SAXReader();
//2.获取Document
Document document = saxReader.read(PATH);
//3.获取根目录
Element root = document.getRootElement();
//4.获取根目录下所有的子元素
List list1 = root.elements();
//5.获取指定元素
Element p1 = (Element) list1.get(1);
//6.获取第二个p1下的name元素
Element name = p1.element("name");
String s = name.getText(); //获取标签中的值
System.out.println("name标签中的值: " + s);
}
//查询xml中所有name元素的值
public static void AllNameValue() throws Exception{
//1.创建构造器
SAXReader saxReader = new SAXReader();
//获取Document
Document document = saxReader.read(PATH);
//获取根目录
Element root = document.getRootElement();
//获取根目录下所有的元素
List<Element> list = root.elements();
//遍历数据
for (Element element:list){
if (element.element("name") != null){
Element name = element.element("name");
System.out.println( name.getText());
}else {
System.out.println("本元素没有name子元素!");
}
}
}
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