dom4j操作xml.docx

导入dom4j-1.4.jar包步骤：创建一个读取xml文件的SAXReader类SAXReader reader = new SAXReader() ;读取xml文件：（路径、文件）Document doc = reader.read(path) ;File file = new File(path) ; If(file.exist()){ Document doc = reader.read(file) ;}获取根节点元素Element root = doc.getRootElement() ;以下就是一些对Element元素的操作写文件static void writeXML(String path){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) ;Document doc = DocumentHelper.createDocument() ;Element root=doc.addElement(学生信息);Element s1 = root.addElement(学生1) ;s1.addAttribute(id, 001) ;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) ;s2.addElement(性别).addText(女) ;writer.write(doc) ;writer.close() ;} catch (Exception e) {e.printStackTrace();}}更新文件static void updateXml(String path){try {SAXReader reader = new SAXReader() ; OutputFormat formart = OutputFormat.createPrettyPrint() ;formart.setEncoding(GB2312) ;XMLWriter writer = null ;Document doc = reader.read(path) ;Element root = doc.getRootElement() ;IteratorElement iter = root.elementIterator() ;while (iter.hasNext()) {Element e = iter.next() ;System.out.println(e.getName());System.out.println(e.attributeValue(id));if (e.attributeValue(id).equals(001)){e.selectSingleNode(姓名).setText(王五) ;break ;}}writer = new XMLWriter(new FileWriter(path),formart) ; writer.write(doc) ;writer.close() ;} catch (Exception e) {e.printStackTrace();}}添加一个Elementstatic void addElement(String path){SAXReader reader = new SAXReader() ;try {Document doc = reader.read(path) ;Element root = doc.getRootElement() ;IteratorElement iter = root.elementIterator() ;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() ;format.setEncoding(GB2312) ;XMLWriter wri