<%
Properties users = new Properties();
InputStream in = application.getResourceAsStream("/WEB-INF/users.properties");
users.load(in);
//InputStream in = application.getResourceAsStream("/WEB-INF/users.xml");
//users.loadFromXML(in);
out.println(users.getProperty("userName"));
users.setProperty("userName","xling");
users.setProperty(users.getProperty("userName") + ".sex","male");
users.setProperty(users.getProperty("userName") + ".password","哈哈！～");
FileOutputStream fout = new FileOutputStream(application.getRealPath("/") + "/WEB-INF/users.properties",false);
FileOutputStream fout2 = new FileOutputStream(application.getRealPath("/") + "/WEB-INF/users.xml",false);
users.store(fout,"users.properties");
users.storeToXML(fout2,"aaaaaaaaa");
%>

<?xml version = '1.0' encoding = 'UTF-8'?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties>
   <comment>aaaaaaaaa</comment>
   <entry key="xling.sex">male</entry>
   <entry key="xling.password">哈哈！～</entry>
   <entry key="userName">xling</entry>
</properties>

#users.properties
#Mon Dec 11 17:12:27 CST 2006
xling.sex=male
xling.password=\u54C8\u54C8\uFF01\uFF5E
userName=xling