<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form id="uform" action="saveUser"> 用户代码：<input id="userid" type="text" name="userid" width=30 /> <br><br> 用户名称：<input id="username" type="text" name="username" width=30 /> <br><br> 登录密码：<input id="password" type="password" name="password" width=30 /> <br><br> 确认密码：<input id="passwore" type="password" name="pueren" width=30 /> <br><br> <input type="submit" value="提交" /> </form> </body> </html>
package com.hanqi; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class saveUser */ public class saveUser extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public saveUser() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //获取 String strUserName = request.getParameter("username"); //转码 //response.setCharacterEncoding("UTF-8");//输入的是UTF-8 //response.setContentType("text/html;charset=UTF-8");//返回的是UTF-8 //判断 if(strUserName != null) { //初始化 strUserName = new String(strUserName.getBytes("ISO-8859-1"),"UTF-8"); response.getWriter().append("strUserName = " + strUserName); } response.getWriter().append("Served at: ").append(request.getContextPath()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package com.hanqi; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; /** * Servlet Filter implementation class MyFilter */ public class MyFilter implements Filter { /** * Default constructor. */ public MyFilter() { // TODO Auto-generated constructor stub } /** * @see Filter#destroy() */ public void destroy() { // TODO Auto-generated method stub } /** * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain) */ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { String userID = request.getParameter("userid"); if(userID == null || userID.trim().length() == 0) { response.getWriter().append("userid is error"); } else { //本句添加在过滤器最下方，用于传递给下一个过滤器或目标页面，构成过滤链条 chain.doFilter(request, response); } } /** * @see Filter#init(FilterConfig) */ public void init(FilterConfig fConfig) throws ServletException { // TODO Auto-generated method stub } }
package com.hanqi; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; /** * Servlet Filter implementation class Test2 */ public class Test2 implements Filter { /** * Default constructor. */ public Test2() { // TODO Auto-generated constructor stub } /** * @see Filter#destroy() */ public void destroy() { // TODO Auto-generated method stub } /** * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain) */ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { response.setCharacterEncoding("UTF-8");//输入的是UTF-8 response.setContentType("text/html;charset=UTF-8");//返回的是UTF-8 chain.doFilter(request, response); } /** * @see Filter#init(FilterConfig) */ public void init(FilterConfig fConfig) throws ServletException { // TODO Auto-generated method stub } }
package com.hanqi; import javax.servlet.ServletContextAttributeEvent; import javax.servlet.ServletContextAttributeListener; import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; import javax.servlet.ServletRequestAttributeEvent; import javax.servlet.ServletRequestAttributeListener; import javax.servlet.ServletRequestEvent; import javax.servlet.ServletRequestListener; import javax.servlet.http.HttpSessionActivationListener; import javax.servlet.http.HttpSessionAttributeListener; import javax.servlet.http.HttpSessionBindingEvent; import javax.servlet.http.HttpSessionBindingListener; import javax.servlet.http.HttpSessionEvent; import javax.servlet.http.HttpSessionListener; /** * Application Lifecycle Listener implementation class TextListener * */ public class TextListener implements ServletContextListener, ServletContextAttributeListener, HttpSessionListener, HttpSessionAttributeListener, HttpSessionActivationListener, HttpSessionBindingListener, ServletRequestListener, ServletRequestAttributeListener { /** * Default constructor. */ public TextListener() { // TODO Auto-generated constructor stub } /** * @see ServletRequestListener#requestDestroyed(ServletRequestEvent) */ public void requestDestroyed(ServletRequestEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionAttributeListener#attributeAdded(HttpSessionBindingEvent) */ public void attributeAdded(HttpSessionBindingEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletContextListener#contextInitialized(ServletContextEvent) */ public void contextInitialized(ServletContextEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionActivationListener#sessionDidActivate(HttpSessionEvent) */ public void sessionDidActivate(HttpSessionEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionBindingListener#valueBound(HttpSessionBindingEvent) */ public void valueBound(HttpSessionBindingEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletContextAttributeListener#attributeAdded(ServletContextAttributeEvent) */ public void attributeAdded(ServletContextAttributeEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletContextAttributeListener#attributeRemoved(ServletContextAttributeEvent) */ public void attributeRemoved(ServletContextAttributeEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionListener#sessionDestroyed(HttpSessionEvent) */ public void sessionDestroyed(HttpSessionEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionAttributeListener#attributeRemoved(HttpSessionBindingEvent) */ public void attributeRemoved(HttpSessionBindingEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletRequestAttributeListener#attributeAdded(ServletRequestAttributeEvent) */ public void attributeAdded(ServletRequestAttributeEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionBindingListener#valueUnbound(HttpSessionBindingEvent) */ public void valueUnbound(HttpSessionBindingEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionActivationListener#sessionWillPassivate(HttpSessionEvent) */ public void sessionWillPassivate(HttpSessionEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionListener#sessionCreated(HttpSessionEvent) */ public void sessionCreated(HttpSessionEvent arg0) { // TODO Auto-generated method stub } /** * @see HttpSessionAttributeListener#attributeReplaced(HttpSessionBindingEvent) */ public void attributeReplaced(HttpSessionBindingEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletContextAttributeListener#attributeReplaced(ServletContextAttributeEvent) */ public void attributeReplaced(ServletContextAttributeEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletRequestAttributeListener#attributeRemoved(ServletRequestAttributeEvent) */ public void attributeRemoved(ServletRequestAttributeEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletContextListener#contextDestroyed(ServletContextEvent) */ public void contextDestroyed(ServletContextEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletRequestAttributeListener#attributeReplaced(ServletRequestAttributeEvent) */ public void attributeReplaced(ServletRequestAttributeEvent arg0) { // TODO Auto-generated method stub } /** * @see ServletRequestListener#requestInitialized(ServletRequestEvent) */ public void requestInitialized(ServletRequestEvent arg0) { // TODO Auto-generated method stub } }
