struts2+mysql实现登陆源码

package com.dlk.java.action; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import javax.servlet.http.HttpServletRequest; import org.apache.catalina.connector.Request; import org.apache.struts2.ServletActionContext; import org.apache.tomcat.util.http.fileupload.servlet.ServletRequestContext; import com.dlk.java.dao.UserDao; import com.dlk.java.dao.UserDaoImpl; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.ModelDriven; public class LoginAction extends ActionSupport implements ModelDriven<User>{ private User user; UserDao userdao = new UserDaoImpl(); public User getUser() { return user; } public void setUser(User user) { this.user = user; } private String msg; public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public String login() { //是否已经登陆 ActionContext action = ActionContext.getContext(); if(action.getSession().get("username")=="" || action.getSession().get("username")==null) { System.out.println("登陆页面传来的数据：用户名："+user.getUsername()+"+密码："+user.getPassword()); String name = userdao.userLogin(user.getUsername(),user.getPassword()); if(!"".equals(name)) { action.getSession().put("username", user.getUsername()); action.getSession().put("name", name); msg = "恭喜登陆成功！"+name; return SUCCESS; }else { msg = "用户名或密码错误！"; return "tologin"; } }else { msg = "已经登陆"+user.getUsername(); return SUCCESS; } } public String show() { ActionContext action = ActionContext.getContext(); String name = (String) action.getSession().get("name"); List<User> userlist = userdao.getAllUser(name); System.out.println("数据库查到数据长度>>"+userlist.size()); Iterator it = userlist.iterator(); while(it.hasNext()) { User user = new User(); user = (User) it.next(); System.out.println("数据库查询出来的用户名："+user.getUsername()); System.out.println("数据库查询出来的密码："+user.getPassword()); } HttpServletRequest hsr = ServletActionContext.getRequest(); hsr.setAttribute("userlist", userlist); return "show"; } public String logout() { ActionContext action = ActionContext.getContext(); System.out.println("将session设置为空！并退出登陆！"); action.getSession().put("username", null); return "tologin"; } @Override public User getModel() { // TODO Auto-generated method stub if(user == null) { user = new User(); } return user; } }