java struts2 导出xml文件

最近在弄java 导出xml文件的功能，做完了跟大家分享一下，也当作自己的备份了



主要用到的技术

1. dom4j-1.6.1.jar

2. struts2

dom4j还是比较方便好用的一个插件，xml无非就是节点套节点，解析和创建都还是比较不错的。

内容格式：

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

<root>
  <computer>
    <computerName name="ThinkPad"/>
    <price>111</price>
  </computer>
</root>

下面贴一下代码

private String xmlFileName;//文件名称

private InputStream xmlStream; // 定义一输入流

记的 get/set

public String computerExportxml() throws IOException, ParseException {
		
		String strXML = null;
		//导出文件名称
		String fn = "computer_info.xml";
		xmlFileName = fn;
		 String xml = null;
        Document document = DocumentHelper.createDocument();
        //创建根节点
        Element root = document.addElement("root");
        //创建一个computer节点，然后绑定给root节点，说明是root下的子项，以下创建都是一样的路数
        Element computer = root.addElement("computer"); 
        //为computer节点添加子节点computerName
        Element computerName = computer.addElement("computerName");
        //为computerName添加属性name，内容为ThinkPad
        computerName.addAttribute("name", "ThinkPad");
        //创建价格节点
        Element ThinkPadprice = computer.addElement("price");
        //给价格添加内容
        ThinkPadprice.addText("111");
        StringWriter strWtr = new StringWriter();
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");
        XMLWriter xmlWriter =new XMLWriter(strWtr, format);
        try {
            xmlWriter.write(document);
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        xml = strWtr.toString();
	try {
            xmlStream = new ByteArrayInputStream(xml.toString().getBytes("utf-8"));           
        } catch (Exception e) {
            
            e.printStackTrace();
        }

	return SUCCESS;
	}

Struts2配置文件设置

标记红色的两个地方就是在类里的两个属性，必须一样

<action name="" class=""

method="">

<result name="success" type="stream">

<param name="inputName">xmlStream</param>

<param name="contentDisposition">attachment;filename="${xmlFileName}"</param>

<param name="contentType">text/plain</param>

<param name="bufferSize">4096</param>

</result>

</action>

前台随便弄个from提交就行了

以下是解析xml的方法

public void parserXML(String strXML){
        SAXReader reader = new SAXReader();
        StringReader sr = new StringReader(strXML);
        InputSource is = new InputSource(sr);
        try {
            Document document = reader.read(is);

            Element root = document.getRootElement();

            //get element
            List<Element> phoneList = root.elements("computer");
            List<Element> typeList = phoneList.get(0).elements("computerName");
            for (int i=0;i<typeList.size();i++){
                Element element = typeList.get(i);
                String phoneName = element.attributeValue("name");
                System.out.println("phonename = "+phoneName);
                //get all element
                List<Element> childList = element.elements();
                for (int j=0;j<childList.size();j++){
                    Element e = childList.get(j);
                    System.out.println(e.getName()+"="+e.getText());
                }
            }
        } catch (DocumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }