dom4j操作xml

s1.addElement("姓名").addText("张三") ;
s1.addElement("性别").addText("男") ;
Element s2 = root.addElement("学生2") ;
s2.addAttribute("id", "002") ;
s2.addElement("姓名").addText("李四") ;
e.remove(e.element("年龄")) ;
break;
}
}
OutputFormat format =newOutputFormat().createPrettyPrint() ;
format.setEncoding("GB2312") ;
XMLWriter writer =newXMLWriter(newFileWriter(path),format) ;
break ;
}
}
writer = new XMLWriter(new FileWriter(path),formart) ;
writer.write(doc) ;
writer.close() ;
} catch (Exception e) {
e.printStackTrace();
}
}
5.添加一个Element
format.setEncoding("GB2312") ;
XMLWriter writer = new XMLWriter(new FileWriter(path),format) ;
writer.write(doc) ;
writer.close() ;
} catch (Exception e) {
while (iter.hasNext()) {
Element e = iter.next() ;
if (e.getName().equals("学生2")) {
e.remove(e.attribute("id")) ;
break ;
}
}
OucreatePrettyPrint() ;
Element root = doc.getRootElement() ;
Iterator<Element> iter = root.elementIterator() ;
while(iter.hasNext()) {
Element e = iter.next() ;
if(e.getName().equals("学生1")) {
writer.write(doc) ;
writer.close() ;
}catch(Exception e) {
//TODOAuto-generated catch block
e.printStackTrace();
}
}
7.删除一个Attribute
static void removeAttribute(String path)
{
try {
SAXReader reader = new SAXReader() ;
OutputFormat formart = OutputFormat.createPrettyPrint() ;
formart.setEncoding("GB2312") ;
XMLWriter writer = null ;
System.out.println(e.getName());
System.out.println(e.attributeValue("id"));
if (e.attributeValue("id").equals("001"))
{
e.selectSingleNode("姓名").setText("王五") ;
static void addElement(String path)
{
SAXReader reader = new SAXReader() ;
try {
Document doc = reader.read(path) ;
Element root = doc.getRootElement() ;
Iterator<Element> iter = root.elementIterator() ;
format.setEncoding("GB2312") ;
XMLWriter writer = new XMLWriter(new FileWriter(path),format) ;
writer.write(doc) ;
writer.close() ;
} catch (Exception e) {
{
SAXReader reader = new SAXReader() ;
try {
OutputFormat format = OutputFormat.createPrettyPrint() ;
format.setEncoding("GB2312") ; //:设置写出来的xml文件的编码方式
XMLWriter writer = new XMLWriter(new FileWriter(path),format) ;
{
SAXReader reader = new SAXReader() ;
try {
Document doc = reader.read(path) ;
Element root = doc.getRootElement() ;
Iterator<Element> iter = root.elementIterator() ;
s2.addElement("性别").addText("女") ;
writer.write(doc) ;
writer.close() ;
} catch (Exception e) {
e.printStackTrace();
}
}
4.更新文件
static void updateXml(String path)
Document doc = reader.read(path) ;
Element root = doc.getRootElement() ;
Iterator<Element> iter = root.elementIterator() ;
while (iter.hasNext()) {
Element e = iter.next() ;
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Document doc = DocumentHelper.createDocument() ;
Element root=doc.addElement("学生信息");
Element s1 = root.addElement("学生1") ;
s1.addAttribute("id", "001") ;
If(file.exist()){
Document doc = reader.read(file) ;
}
3.获取根节点元素
Element root = doc.getRootElement() ;
4.以下就是一些对Element元素的操作
3.写文件
static void writeXML(String path)
// TODO Auto-generated catch block
e.printStackTrace();
}
}
6.删除一个Element
staticvoidremoveElement(String path)
{
SAXReader reader =newSAXReader() ;
try{
Document doc = reader.read(path) ;
1.导入dom4j-1.4.jar包
2.步骤：
1.创建一个读取xml文件的SAXReader类
SAXReader reader = new SAXReader() ;
2.读取xml文件：（路径、文件）
Document doc = reader.read(path) ;
File file = new File(path) ;
while (iter.hasNext()) {
Element e = iter.next() ;
if (e.getName().equals("学生1")) {
e.addElement("年龄").addText("28") ;
break ;
}
}
OutputFormat format = new OutputFormat().createPrettyPrint() ;