Servlet中URL与URI的区别
看我给你举个例子---ServletPath,ContextPath,URI,URL4个的比较
request.getServletPath()-----/user/register.action
request.getContextPath()-----/testWeb
request.getRequestURI()-----/testWeb/user/register.action
request.getRequestURL()-----http://localhost:8080/testWeb/user/register.action
testWeb是你的web项目（工程）名
struts2下位register.action,struts1.x下位register.do
