Java读取xml配置文件

package test.com;

import java.io.FileInputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class XmlParser {
public static void main(String[] args) throws Exception {
getXML("src/parameters.xml","HolderName");

readXmlFile("src/Accounts.xml");
}

/**
* @desc 根据key属性的值，获取节点的值
*
*
*/
public static String getXML(String sqlXMLPath, String node) throws Exception {

DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
FileInputStream xmlInputStream = new FileInputStream(sqlXMLPath);
DocumentBuilder builder = builderFactory.newDocumentBuilder();
Document document = builder.parse(xmlInputStream);

Node n = document.getChildNodes().item(0);
NodeList nl = n.getChildNodes();

for (int i = 0; i < nl.getLength(); i++) {
if (!nl.item(i).getNodeName().equals("#text")) {
Element e = (Element) nl.item(i);
System.out.println(nl.item(i).getNodeName() + "\t" + e.getAttribute("key") + "\t" + nl.item(i).getTextContent());
String key = e.getAttribute("key");
String value = nl.item(i).getTextContent();
if (key.equals(node)) {
return value;
}
}
}
return null;
}

}

public static void readXmlFile(String fileName) throws Exception {
FileInputStream xmlInputStream = new FileInputStream(fileName);

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); // 返回documentBuilderFactory对象
DocumentBuilder db = dbf.newDocumentBuilder();// 返回db对象用documentBuilderFatory对象获得返回documentBuildr对象
Document dt = db.parse(xmlInputStream); // 得到一个DOM并返回给document对象
Element element = dt.getDocumentElement();// 得到一个elment根元素
System.out.println("根元素：" + element.getNodeName()); // 获得根节点
NodeList childNodes = element.getChildNodes(); // 获得根元素下的子节点
for (int i = 0; i < childNodes.getLength(); i++) // 遍历这些子节点
{
Node node1 = childNodes.item(i); // childNodes.item(i);
// 获得每个对应位置i的结点
if ("Account".equals(node1.getNodeName())) {
// 如果节点的名称为"Account"，则输出Account元素属性type
System.out.println("\r\n找到一个账号. 所属区域:s" + node1.getAttributes().getNamedItem("type").getNodeValue() + "$$");
NodeList nodeDetail = node1.getChildNodes(); // 获得<Accounts>下的节点
for (int j = 0; j < nodeDetail.getLength(); j++) { // 遍历<Accounts>下的节点
Node detail = nodeDetail.item(j); // 获得<Accounts>元素每一个节点
if ("code".equals(detail.getNodeName())) // 输出code
System.out.println("卡号: " + detail.getTextContent());
else if ("pass".equals(detail.getNodeName())) // 输出pass
System.out.println("密码: " + detail.getTextContent());
else if ("name".equals(detail.getNodeName())) // 输出name
System.out.println("姓名: " + detail.getTextContent());
else if ("money".equals(detail.getNodeName())) // 输出money
System.out.println("余额: " + detail.getTextContent());
}
}
}

}

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

<parameters>
<parameter key="HolderName">测试</parameter>
<parameter key="save-holder">1</parameter>
<parameter key="HolderEmail">[e-mail]</parameter>
<parameter key="HolderCardType">3</parameter>
<parameter key="HolderCardNo">asdasd</parameter>
<parameter key="HolderSex">1</parameter>
<parameter key="HolderMobile">13333333333</parameter>
</parameters>

<?xml version="1.0" encoding="UTF-8"?>
<Accounts>
<Account type="by0003">
<code>100001</code>
<pass>123</pass>
<name>李四</name>
<money>1000000.00</money>
</Account>
<Account type="hz0001">
<code>100002</code>
<pass>123</pass>
<name>张三</name>
<money>1000.00</money>
</Account>
</Accounts>