JAVA XML的解析与创建

来源：互联网发布：中国网络资讯台李学科编辑：程序博客网时间：2024/06/07 14:38

//------------------------------xml文件下的东西

<?xml version="1.0" encoding="utf-8"?>
<students>
<student id="1">
   <name>张三</name>
   <sex>男</sex>
</student>

<student id="2">
   <name>李四</name>
   <sex>男</sex>
</student>

<student id="3">
   <name>王五</name>
   <sex>男</sex>
</student>
</students>

//-----------------------------------------------------解析

public static void read() throws Exception{
       DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
           DocumentBuilder builder=factory.newDocumentBuilder();
           InputStream is=new FileInputStream(new File("student.xml"));
           Document doc=builder.parse(is);
           NodeList nodes=doc.getElementsByTagName("student");
           for (int i = 0; i < nodes.getLength(); i++) {
               Element student=(Element) nodes.item(i);
               String id=student.getAttribute("id");
               Element nameElm=(Element) student.getElementsByTagName("name").item(0);
               String name=nameElm.getTextContent();
               Element sexElm=(Element) student.getElementsByTagName("sex").item(0);
               String sex=sexElm.getTextContent();
               System.out.println("id:"+id+"name:"+name+"sex:"+sex);
           }
   }

//------------------------------------------------XML创建

public static void write() throws Exception{
       DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
       DocumentBuilder builder=factory.newDocumentBuilder();
       Document doc=builder.newDocument();
       Element teachers=doc.createElement("teachers");
       Element teacher=doc.createElement("teacher");
       teacher.setAttribute("id", "1");
       Element name=doc.createElement("name");
       name.setTextContent("李老师");
       Element course=doc.createElement("course");
       course.setTextContent("java");
       teacher.appendChild(course);
       teacher.appendChild(name);
       teachers.appendChild(teacher);
       doc.appendChild(teachers);

       TransformerFactory tfactory=TransformerFactory.newInstance();
       Transformer tf=tfactory.newTransformer();
       Source ds=new DOMSource(doc);
       StreamResult r=new StreamResult(new File("teacher.xml"));
       tf.transform(ds, r);
   }

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