一、创建XML
// 建立XML public static void gernatorXML() { // 创建Document对象 Document doc = DocumentHelper.createDocument(); // 创建根节点students Element studentsElement = doc.addElement("students"); // 创建子节点student Element studentElement1 = studentsElement.addElement("student"); // 添加ID属性 studentElement1.addAttribute("id", "1001"); // 添加子节点 studentElement1.addElement("name").setText("张三"); studentElement1.addElement("age").setText("18"); studentElement1.addElement("sex").setText("男"); studentElement1.addElement("phone").setText("13800138000"); studentElement1.addElement("address").setText("深圳宝安"); // 再创建同样的2个student节点 Element studentElement2 = studentsElement.addElement("student"); // 添加ID属性 studentElement2.addAttribute("id", "10012"); // 添加子节点 studentElement2.addElement("name").setText("李四"); studentElement2.addElement("age").setText("19"); studentElement2.addElement("sex").setText("女"); studentElement2.addElement("phone").setText("13412369854"); studentElement2.addElement("address").setText("上海"); // 再创建同样的2个student节点 Element studentElement3 = studentsElement.addElement("student"); // 添加ID属性 studentElement3.addAttribute("id", "10013"); // 添加子节点 studentElement3.addElement("name").setText("王五"); studentElement3.addElement("age").setText("25"); studentElement3.addElement("sex").setText("女"); studentElement3.addElement("phone").setText("13410110104"); studentElement3.addElement("address").setText("广东"); try { // 创建XML 将Document写入XML // 设置格式 OutputFormat format = OutputFormat.createPrettyPrint(); // 设置字符编码也可以设置为gb2312或者gbk format.setEncoding("utf-8"); // 输入 XMLWriter writer = new XMLWriter( new FileWriter("xml/students.xml"), format); // 写入文档 writer.write(doc); // 关闭流 writer.close(); // 输出提示 System.out.println("======写入成功======="); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }
二、解析XML
// 读取XML public static void getXML() { try { // 读取XML SAXReader reader = new SAXReader(); Document doc = reader.read("xml/students.xml"); // 获取根节点 Element root = doc.getRootElement(); // 获取子节点集合 List<Element> stulList = root.elements(); // 遍历 for (Element ele : stulList) { // 获取属性 String id = ele.attributeValue("id"); System.out.println("学生ID: " + id); // 获取子节点的文本内容 name String name = ele.elementText("name"); // age年龄 String age = ele.elementText("age"); // sex String sex = ele.elementTextTrim("sex"); // phone String phone = ele.elementTextTrim("phone"); // address String address = ele.elementTextTrim("address"); System.out.println("姓名：" + name + " 年龄: " + age + " 性别: " + sex + " 电话：" + phone + " 地址: " + address); } } catch (DocumentException e) { e.printStackTrace(); } }
三、增加节点
//增加新的节点 public static void addXML(){ try { //读取XML创建解析器 SAXReader reader=new SAXReader(); //创建Document对象 Document doc=reader.read("xml/students.xml"); //获取根节点 Element root=doc.getRootElement(); //创建新的节点 Element student=root.addElement("student"); //添加属性 student.addAttribute("id", "10020"); //创建子节点 student.addElement("name").setText("张三丰"); student.addElement("age").setText("108"); student.addElement("sex").setText("男"); student.addElement("phone").setText("13800138001"); student.addElement("address").setText("武当山"); //写入XML //设置字符编码和格式 OutputFormat format=new OutputFormat(); format.setEncoding("utf-8"); //创建输出流 XMLWriter writer=new XMLWriter(new FileWriter("xml/students.xml"), format); //写入Document writer.write(doc); //关闭流 writer.close(); //给出提示 System.out.println("======增加成功======="); } catch (DocumentException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }
四、修改节点
//修改节点内容根据 id10013将王五的姓名=王小五，年龄30，性别：男，电话：138000138000，地址：北京 public static void modify(){ try { //创建SAXReader解析器 SAXReader reader=new SAXReader(); //创建Document Document doc=reader.read("xml/students.xml"); //找到根节点 Element root=doc.getRootElement(); //子节点集合 List<Element> studentList=root.elements(); //遍历查找 for (Element ele : studentList) { if(ele.attributeValue("id").equals("10013")){ ele.element("name").setText("王小五"); ele.element("age").setText("30"); ele.element("sex").setText("男"); ele.element("phone").setText("138000138000"); ele.element("address").setText("北京"); } } //写入XML //设置字符格式和编码 OutputFormat format=new OutputFormat(); format.setEncoding("utf-8"); XMLWriter writer=new XMLWriter(new FileWriter("xml/students.xml"), format); //将Document写入 writer.write(doc); //关闭流 writer.close(); //给出提示 System.out.println("====修改成功===="); } catch (DocumentException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }
五、删除节点XML
/删除节点 删除王小五的节点 public static void delete(){ try { //创建SAXReader 解析器 SAXReader reader=new SAXReader(); //创建Document对象 Document doc=reader.read("xml/students.xml"); //获取根节点 Element root=doc.getRootElement(); //集合 List<Element> stuList=root.elements(); //遍历 for (Element ele : stuList) { if(ele.attributeValue("id").equals("10013")){ //获取父节点，并删除这个节点 ele.getParent().remove(ele); } } //写入XML //设置字符编码格式 OutputFormat format =new OutputFormat(); format.setEncoding("utf-8"); //输出流 XMLWriter writer=new XMLWriter(new FileWriter("xml/students.xml"), format); writer.write(doc); writer.close(); System.out.println("===删除成功==="); } catch (DocumentException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }