dom4j解析、修改、生成xml文件(转)

原地址： http://xu283900277xiu.iteye.com/blog/542466

项目中用到XML的地方非常普遍，XML也不是一种新的技术。但经常遇到朋友们问如何操作XML文件。所以写一个小例子，代码很乱。写出来和大家一起交流学习

1、生成XML

Java代码


public void createApplicationConfigXML(){

//建立document对象

try {

Document document = DocumentHelper.createDocument();

Element root = document.addElement("root");//添加文档根

root.addComment("这个一个注释");//加入一行注释

Element request = root.addElement("request"); //添加root的子节点

request.addAttribute("type", "cat");

request.addAttribute("flow", "tong");

request.addAttribute("time", "2009");

Element pro = request.addElement("pro");

pro.addAttribute("type", "att");

pro.addAttribute("name", "附件");

pro.addText("测试哈子");

Element cd = request.addElement("pro");

cd.addAttribute("type", "cd");

cd.addAttribute("name", "特殊字符过滤");

cd.addCDATA("特殊字符");

//输出全部原始数据，在编译器中显示

OutputFormat format = OutputFormat.createPrettyPrint();

format.setEncoding("GBK");//根据需要设置编码

XMLWriter writer = new XMLWriter(System.out, format);

document.normalize();

writer.write(document);

writer.close();

// 输出全部原始数据，并用它生成新的我们需要的XML文件

XMLWriter writer2 = new XMLWriter(new FileWriter(new File(

"test.xml")), format);

writer2.write(document); //输出到文件

writer2.close();

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

-----------------------------------------------------------------

下面是解析和修改XML

XML文件内容如下：

Xml代码


<?xml version="1.0" encoding="utf-8"?>

<root>

<request type="Pending" flowType="GENERAL" flowName="报销流程"

docId="185647" flowId="16409" nodeName="报销人确认" wikId="58288"

sendId="1210040" userId="1210040" createDate="2009-12-03"

title="费用报销 " flowCreaterId="1210040" nodeType="1"

bosTime="2009-12-03 09:36:15">

<pro type="att"></pro>

<pro type="textarea" name="OP_bxryj" title="处理意见" need="true"></pro>

</request>

</root>

修改

Java代码


public String getApplcationConfigFromXMLTest(){

String value = "";

try {

SAXReader sax = new SAXReader();

Document xmlDoc = sax.read(new File(this.UBSSDIC_PATH));

Element root = xmlDoc.getRootElement();//根节点

Iterator it = root.elementIterator();

while(it.hasNext()){

Element ele = (Element)it.next();

Attribute attribute = ele.attribute("type");

if(attribute.getStringValue().equals("Pending")){

attribute.setValue("sendread2");//修改属性节点的值

}

Attribute flowType = ele.attribute("flowType");

flowType.detach();//删除某个属性

ele.addAttribute("type", "Pending");//添加一个属性节点

}

Element new_cdata = root.addElement("new_cdata");//添加一个元素

new_cdata.addCDATA("tst&ree");

Element new_ele = root.addElement("new_ele");//添加一个元素

new_ele.addText("33434343");

Element obj = (Element)root.selectObject("//pro[@type='att']");//根据XPath查找元素

obj.setText("测试dddddd");//修改元素的值 即text节点

//输出全部原始数据，在编译器中显示

OutputFormat format = OutputFormat.createPrettyPrint();

format.setEncoding("GBK");

XMLWriter writer = new XMLWriter(System.out, format);

writer.write(xmlDoc);

writer.close();

// 输出全部原始数据，并用它生成新的我们需要的XML文件

XMLWriter writer2 = new XMLWriter(new FileWriter(new File(

"test.xml")), format);

writer2.write(xmlDoc); //输出到文件

writer2.close();

} catch (DocumentException e) {

System.out.println(e.getMessage());

e.printStackTrace();

}catch(IOException e){

e.printStackTrace();

}

return value ;

}

解析

Java代码


public void parseApplicationConfigXML(){

try {

SAXReader sax = new SAXReader();

Document xmlDoc = sax.read(new File("E:\\20090316HPS\\Dom4jTest\\t.xml"));

Element root = xmlDoc.getRootElement();//根节点

Iterator it = root.elementIterator("request");

while(it.hasNext()){

Element request = (Element)it.next();

System.out.println(request.getName());

System.out.println(request.attributeValue("type"));

System.out.println(request.attributeValue("flow"));

System.out.println(request.attributeValue("time"));

}

System.out.println("-------------------------------------------");

List list = root.selectNodes("//pro");

for(int i = 0; i < list.size(); i++){

Element pro = (Element)list.get(i);

System.out.println(pro.getName());

System.out.println(pro.attributeValue("type"));

System.out.println(pro.attributeValue("name"));

System.out.println(pro.getText());

System.out.println("+++++++++++++++++++++++++++++++++");

}

} catch (DocumentException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}