JAVA中三种高效的XML操作，分别为SAX,VTD,XPP,里面是一个完整的实例，可分别测试三种方式解析XML的效能，不可多得的好代码-Three efficient in JAVA and XML operations, respectively, SAX, VTD XPP, which is a complete example, can be tested in three ways to parse XML performance, a rare code