String usrHome = System.getProperty("user.home");
下面是System的参数列表
Key Meaning
------------------- ------------------------------
"file.separator" File separator (e.g., "/")
"java.class.path" Java classpath
"java.class.version" Java class version number
"java.home" Java installation directory
"java.vendor" Java vendor-specific string
"java.vendor.url" Java vendor URL
"java.version" Java version number
"line.separator" Line separator
"os.arch" Operating system architecture
"os.name" Operating system name
"path.separator" Path separator (e.g., ":")
"user.dir" User's current working directory
"user.home" User home directory
"user.name" User account name
下面是一个过滤html元素的程序，也许对大家有点帮助！
/**
* filter all html element.
* For example:<a href="www.sohu.com/test">hello!</a>
* The filter result is :hello!
......
序列化就是把对象转换为流以存储到文件或传输给另一个程序；反序列化就是把流转换为对象。JAVA的序列化，是通过是java.io.Serializable接口来实现的。该接口不包含任何方法，仅标记是否可被序列化。可序列化的类，其成员也必须是可序列化的（如果有成员不能被序列化，则必须将该变量标记为：transient（瞬态），序列化时，� ......
