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ServletÈý¸öÒªËØ:
1.±ØÐë¼Ì³Ð×ÔHttpServlet
2.±ØÐëʵÏÖdoGet()»òÕßdoPost()
3.±ØÐëÔÚweb.xmlÖÐÅäÖÃServlet
<servlet>
<servlet-name> </servlet-name>
<servlet-class> </servlet-class>
</servlet>
<servlet-mapping>
<servlet-name> </servlet-name>
<url-pattern> </url-pattern>
</servelt-mapping>
HttpServeltRrequest:ÇëÇó¶ÔÏó
getParameter():»ñµÃ±íµ¥ÔªËصÄÖµ
getAttribute():»ñµÃrequest·¶Î§ÖеÄÊôÐÔÖµ
setAttribute():ÉèÖÃreqeust·¶Î§ÖеÄÊôÐÔÖµ
setCharacterEncoding():ÉèÖÃ×Ö·û±àÂë
HttpSerletResponse:ÏàÓ¦¶ÔÏó
sendRedirect():ÍⲿÌøת
getWriter():»ñµÃÊä³öÁ÷¶ÔÏó
setContentType("text/html; charset=utf-8"):ÉèÖÃÏàÓ¦ÄÚÈݸñʽºÍ±àÂë
ËÄÖֻỰ¸ú×Ù·½Ê½:
1.Session
HttpSession session = request.getSession();
session.setAttribute("name", "zhangsan");
session.setAttribute("pwd", "aaa");
String name = (String) session.getAttribute("name");
2.cookie:
//´´½¨Cookie
Cookie cookie = new Cookie("name", "zhangsan");
//ÉèÖÃCookieµÄ³¬Ê±Ê±¼ä
cookie.setMaxAge(24 * 60 * 60 *60);
//°ÑCookie·¢Ë͵½¿Í»§¶Ë
response.addCookie(cookie);
//µÃµ½¿Í»§¶Ë·¢Ë͵ÄCookie
Cookie [] cookies = request.getCookies();
for(int i=0; i <cookies.length; i++) {
  Cookie temp = cookies;
  String key = temp.getName();
  String value = temp.getValue();
}
3.Òþ²Ø±íµ¥Óò
<input type="hidden" name="name" value="zhangsan" />
request.getParameter("name");
4.UrlÖØд
ÎʺŴ«²Î
LoginServlet?username=zhangsan&pwd=123
String name = request.getParameter("username");
String pwd =request.getPareameter("pwd");
ÄÚ²¿Ìøת:
LoginServlet
request.getRequestDispatcher("index.jsp").forward(request, resposne);
ÍⲿÌøת:
response.sendRedirect("index.jsp");
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ÍⲿÌøתÊÇÁ½´ÎÇëÇóºÍÁ½´ÎÏìÓ¦
ServletContext:ServletÉÏÏÂÎĶÔÏó
ËüÊÇÒ»¸ö¹«¹²ÇøÓò,¿ÉÒÔ±»ËùÓеĿͻ§¶Ë¹²Ïí
setAttribute():Ïò¹«¹²ÇøÓòÀï·ÅÈëÊý¾Ý
getAttribute():´Ó¹«¹²ÇøÓòÀïÈ¡