利用DOM4J API, 学习将数据生成到XML文件中-Using DOM4J API, and learn to generate the data to an XML file

dom4j是一个Java的XML API，类似于jdom，用来读写XML文件的。dom4j是一个非常非常优秀的Java XML API，具有性能优异、功能强大和极端易用使用的特点，同时它也是一个开放源代码的软件(Dom4j is a Java XML API, similar to JDOM, used to read and write XML files. Dom4j is a very, very good Java XML API, which is excellent in perfo