dom4j讀取、修改、刪除xml

<?xml version="1.0" encoding="GBK"?><br /><bank><br /> <phone>1800138000</phone><br /> <loginpass>111111</loginpass><br /> <card><br /> <name>紅色的太陽</name><br /> <cardno>6222222222222222222</cardno><br /> </card><br /> <card><br /> <name>簽約帳號三</name><br /> <cardno>6222222222222222223</cardno><br /> </card><br /></bank><br />

下面的方法是擷取根節點下面的子節點的值（如上面的phone，把phone當做參數傳到readXML方法中即可）

public static String readXML(String element)<br />{<br />String result=null;<br />SAXReader reader = new SAXReader();<br />File file = new File(ConsoleValue.FILE_PATH);<br />try {<br /> Document doc = reader.read(file);<br /> Element root = doc.getRootElement();// 得到根節點<br /> for (Iterator i = root.elementIterator(type); i.hasNext();) {<br /> Element element = (Element) i.next();<br /> result=element.getText();<br /> }<br />} catch (DocumentException e) {<br /> // TODO Auto-generated catch block<br /> e.printStackTrace();<br />}<br />return result;<br />} 

下面是擷取根目錄下有多個相同的子節點所有的值("例如XML檔案中的CARD")

public static ArrayList readCardXML(String type)<br />{<br />ArrayList list=new ArrayList();<br />SAXReader reader = new SAXReader();<br />File file = new File(ConsoleValue.FILE_PATH);<br />try {<br /> Document doc = reader.read(file);<br /> Element root = doc.getRootElement();// 得到根節點<br /> Iterator i = root.elementIterator(type); </p><p> for (int j=0; i.hasNext();j++) {<br /> String[] card=new String[2];<br /> Element e = (Element) i.next();</p><p> card[0]=e.selectSingleNode("name").getText();<br /> card[1]=e.selectSingleNode("cardno").getText();<br /> list.add(card);<br /> }</p><p>} catch (DocumentException e) {<br /> // TODO Auto-generated catch block<br /> e.printStackTrace();<br />}<br />return list;<br />}

下面是修改節點對應的值（例如修改phone的值，type為phone,value為新修改的值）

public static void modifyXML(String type,String value)<br />{<br />SAXReader reader = new SAXReader();<br />File file = new File(ConsoleValue.FILE_PATH);<br />try {<br /> Document doc = reader.read(file);<br /> Element root = doc.getRootElement();// 得到根節點<br /> OutputFormat format = OutputFormat.createPrettyPrint();<br /> format.setEncoding("GBK");// 設定XML檔案的編碼格式</p><p> for (Iterator i = root.elementIterator(type); i.hasNext();) {<br /> Element element = (Element) i.next();<br /> if(element.getName().equals(type))<br /> {<br /> element.setText(value);<br /> System.out.println(element.getName()+"_"+element.getText());<br /> XMLWriter writer = new XMLWriter(new FileWriter(ConsoleValue.FILE_PATH), format);<br /> writer.write(doc);<br /> writer.close();<br /> }<br /> }<br /> } catch (DocumentException e) {<br /> // TODO Auto-generated catch block<br /> e.printStackTrace();<br /> } catch(IOException e)<br /> {<br /> e.printStackTrace();<br /> }</p><p>}

下面為刪除某一節點的代碼（例如刪除phone這個節點，就把phone傳進去就可以了）

public static void delCardXML(String type)<br />{<br />SAXReader reader = new SAXReader();<br />File file = new File(ConsoleValue.FILE_PATH);<br />try {<br /> Document doc = reader.read(file);<br /> Element root = doc.getRootElement();// 得到根節點<br /> OutputFormat format = OutputFormat.createPrettyPrint();<br /> format.setEncoding("GBK");// 設定XML檔案的編碼格式</p><p> for (Iterator i = root.elementIterator(type); i.hasNext();) {<br /> Element element = (Element) i.next();<br /> if(element.getName().equals(type))<br /> {<br /> root.remove(element);<br /> XMLWriter writer = new XMLWriter(new FileWriter(ConsoleValue.FILE_PATH), format);<br /> writer.write(doc);<br /> writer.close();<br /> }<br /> }<br /> } catch (DocumentException e) {<br /> // TODO Auto-generated catch block<br /> e.printStackTrace();<br /> } catch(IOException e)<br /> {<br /> e.printStackTrace();<br /> }</p><p>}

XML.modifyXML("phone","13800138111");<br />ArrayList list=XML.readCardXML("card");<br />System.out.println(list.size());<br />for(int i=0;i<list.size();i++)<br />{<br /> String []card=(String [])list.get(i);<br /> System.out.println(card[0]+"__"+card[1]);<br />}<br />XML.delCardXML("phone");

 

注意：使用以上代碼需要匯入dom4j-1.6.1.jar和jaxen-1.1.1.jar