session对象应用示例

2012-10-24

session对象使用示例携带用户名往下跳转的例子首先把我们需要实现的功能用到的2 个页面建立好。login.jsp

session对象使用示例
携带用户名往下跳转的例子

首先把我们需要实现的功能用到的2 个页面建立好。login.jsp 和success.jsp

login.jsp

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>无标题文档</title></head><body><form id="form1" name="form1" method="post" action="login1.do">  用户名  <label>  <input name="username" type="text" id="username" />  </label>  <p>密码    <label>    <input name="password" type="text" id="password" />    </label>  </p>  <p>    <label>    <input type="submit" name="Submit" value="提交" />    </label>  </p></form></body></html>

success.jsp

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>无标题文档</title></head><body>${name} 登陆成功</body></html>

注意 ${name} 这里。这里边使用的就是EL表达式。目的就是为了把你在login.jsp中输入的用户名接过来显示在success.jsp中。${name}对应的是bb.setAttribute("name",username)
中的"name"，而username是从jsp中的username 属性中得到的。

1 个form

/* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */package form;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionMapping;public class LoginForm extends ActionForm {/* * Generated fields *//** password property */private String password;/** username property */private String username;public ActionErrors validate(ActionMapping mapping,HttpServletRequest request) {// TODO Auto-generated method stubreturn null;}public void reset(ActionMapping mapping, HttpServletRequest request) {// TODO Auto-generated method stub}/**  * Returns the password. * @return String */public String getPassword() {return password;}/**  * Set the password. * @param password The password to set */public void setPassword(String password) {this.password = password;}/**  * Returns the username. * @return String */public String getUsername() {return username;}/**  * Set the username. * @param username The username to set */public void setUsername(String username) {this.username = username;}}

1 个 action

package action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.apache.struts.action.Action;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import form.LoginForm;public class Login1Action extends Action {/** * 这里面要用到session */public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stubHttpSession bb=request.getSession();//建立个session对象String username =loginForm.getUsername();String password =loginForm.getPassword();if (username.equals("w")&&password.equals("w")){bb.setAttribute("name",username);//用到的是setAttribute方法return mapping.findForward("ok");}return mapping.findForward("nook");}}

热点排行

软件架构设计

session对象应用示例