发布于 2017-12-11 10:23:33 | 62 次阅读 | 评论: 0 | 来源: 网友投递

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Struts Java MVC框架

Struts 是Apache软件基金会(ASF)赞助的一个开源项目。它最初是Jakarta项目中的一个子项目,并在2004年3月成为ASF的顶级项目。它通过采用JavaServlet/JSP技术,实现了基于Java EEWeb应用的MVC设计模式的应用框架,是MVC经典设计模式中的一个经典产品。


这篇文章主要介绍了struts2与cookie 实现自动登录和验证码验证实现代码的相关资料,需要的朋友可以参考下

主要介绍struts2与cookie结合实现自动登录

struts2与cookie结合时要注意采用.action 动作的方式实现cookie的读取

struts2的jar包

 链接数据库文件 db.properties


dbDriver = oracle.jdbc.driver.OracleDriver
url = jdbc:oracle:thin:@localhost:1521:orcl
userName=test
password=password

dao层类代码,通过登录名获取用户信息


package com.struts.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.struts.dao.UserDao;
import com.struts.proj.User;
import com.struts.util.BeanConnection;

public class UserDaoImpl implements UserDao {
  private BeanConnection dbconn = new BeanConnection();
  public User login(String loginname) {
     Connection conn = dbconn.getConnection();
     ResultSet rs = null ;
     String selsql = "select * from t_scoa_sys_user where f_loginname='"+loginname+"'";
     //System.out.println(selsql);
     PreparedStatement pstmt = null;
     User user = null;
    try {
      pstmt = conn.prepareStatement(selsql);
      //pstmt.setString(3, loginname);
      rs = pstmt.executeQuery();
      while(rs.next()){
        user = new User();
        user.setId(rs.getLong(1));
        user.setF_username(rs.getString(2));
        user.setF_loginname(rs.getString(3));
        user.setF_sex(rs.getString(4));
        user.setF_state(rs.getString(5));
        user.setF_email(rs.getString(6));
        user.setF_mobilephone(rs.getString(7));
        user.setF_secretaryid(rs.getLong(8));
        user.setF_password(rs.getString(9));
        user.setF_order(rs.getLong(10));
        user.setF_note(rs.getString(11));
        user.setF_infomodifytemplateid(rs.getLong(12));
      }
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return user;
  }

  public void save(User user) {
    
  }
  
  public static void main(String[] args) {
    UserDaoImpl daoimpl = new UserDaoImpl();
    daoimpl.login("admin");
  }

}

工具类 CookieUtils类


package com.struts.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.commons.lang.xwork.StringUtils;
import org.apache.struts2.ServletActionContext;

import com.struts.action.LoginAction;
import com.struts.proj.User;
import com.struts.service.UserService;
import com.struts.service.impl.UserServiceImpl;

public class CookieUtils {
  public static final String USER_COOKIE = "user.cookie";

  // 增加cookie
  public Cookie addCookie(User user) {
    Cookie cookie = new Cookie(USER_COOKIE, user.getF_loginname() + ","
        + DESEDE.decryptIt(user.getF_password()));
    cookie.setMaxAge(60 * 60 * 24 * 365);
    return cookie;
  }

  // 得到cookie
  public boolean getCookie(HttpServletRequest request, UserService userService) {
    request = ServletActionContext.getRequest();
    Cookie[] cookies = request.getCookies();
    userService = new UserServiceImpl();
    if (cookies != null) {
      for (Cookie cookie : cookies) {
        if (CookieUtils.USER_COOKIE.equals(cookie.getName())) {
          String value = cookie.getValue();
          // 判断字符是否为空
          if (StringUtils.isNotBlank(value)) {
            String[] spilt = value.split(",");
            String loginname = spilt[0];
            String password = spilt[1];
            User user = userService.login(loginname, password);
            if (user != null) {
              HttpSession session = request.getSession();
              session
                  .setAttribute(LoginAction.USER_SESSION,
                      user);// 添加用户到session中
              return true;
            }
          }
        }
      }
    }
    return false;
  }

  // 删除cookie
  public Cookie delCookie(HttpServletRequest request) {
    request = ServletActionContext.getRequest();
    Cookie[] cookies = request.getCookies();
    if (cookies != null) {
      for (Cookie cookie : cookies) {
        if (USER_COOKIE.equals(cookie.getName())) {
          cookie.setValue("");
          cookie.setMaxAge(0);
          return cookie;
        }
      }
    }
    return null;
  }
}

service层代码,验证用户名和密码是否正确,密码我本地用了加密算法,需要解密,友友们可以去掉


package com.struts.service.impl;

import com.struts.dao.UserDao;
import com.struts.dao.impl.UserDaoImpl;
import com.struts.proj.User;
import com.struts.service.UserService;
import com.struts.util.DESEDE;

public class UserServiceImpl implements UserService {
  UserDao userDao = new UserDaoImpl();

  public User login(String loginname, String password) {
    User user = userDao.login(loginname);
    if (user == null) {
      System.out.println("用户名不存在,请检查后重新登录!");

    }
    if (!DESEDE.decryptIt(user.getF_password()).equals(password)) {
      System.out.println("密码错误");
    }
    return user;
  }

  public static void main(String[] args) {
    UserServiceImpl useimp = new UserServiceImpl();
    System.out.println(useimp.login("admin", "1234"));
  }
  
}

 struts2的配置文件struts.xml,loginAction和ValidateCodeAction验证码的验证


<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
  "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
  "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
  <constant name="struts.i18n.reload" value="true" />
  <constant name="struts.devMode" value="true" />
  <package name="loginResult" extends="struts-default" namespace="/">
    <action name="loginAction" class="com.struts.action.LoginAction">
      <result name="success" type="redirect">/success.jsp</result>
      <result name="error">/error.jsp</result>
      <result name="login" type="redirect">/login.jsp</result>
    </action>
    <!-- 验证码 -->
    <action name="validate" class="com.struts.action.ValidateCodeAction">
      <param name="width">60</param>
      <param name="height">20</param>
      <param name="fontSize">18</param>
      <param name="codeLength">4</param>
      <result type="stream">
        <param name="contentType">image/jpeg</param>
        <param name="inputName">inputStream</param>
      </result>
    </action>
  </package>
</struts>

 action文件类 LoginAction


package com.struts.action;

import java.util.Map;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;


import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.struts.proj.User;
import com.struts.service.UserService;
import com.struts.service.impl.UserServiceImpl;
import com.struts.util.CookieUtils;
import com.struts.util.DESEDE;

public class LoginAction extends ActionSupport {
  private static final long serialVersionUID = 6650955874307814247L;
  private String f_loginname;
  private String f_password;

  private HttpServletResponse response;
  private HttpServletRequest request;
  private Map<String, Object> session;
  private CookieUtils cookieUtils = new CookieUtils();
  private boolean userCookie;

  private String validateCode;

  public static final String USER_SESSION = "user.session";

  UserService userService = new UserServiceImpl();

  public String autoLogin() throws Exception {
    request = ServletActionContext.getRequest();
    if (cookieUtils.getCookie(request, userService)) {
      return "success";
    } else
      return "login";
  }

  @Override
  public String execute() throws Exception {
    HttpSession session = ServletActionContext.getRequest().getSession();
    try {
       String code = (String) session.getAttribute("validateCode");
      if (validateCode == null || !validateCode.equals(code)) {
        System.out.println("验证码输入有误,请正确输入");
        return "error";
      }
      if (f_loginname != null && !"".equals(f_loginname)
          && !"".equals(f_password) && f_password != null) {
        User user = userService.login(f_loginname, f_password);
        // 判断是否要添加到cookie中
        String psswd = DESEDE.decryptIt(user.getF_password());
        if (user != null && psswd.equals(f_password)) {
          if (userCookie) {
            Cookie cookie = cookieUtils.addCookie(user);
            ActionContext.getContext().get("response");
            ServletActionContext.getResponse().addCookie(cookie);
          }
          session.setAttribute(USER_SESSION, user);
          return "success";
        }
      }

    } catch (Exception e) {
      e.printStackTrace();
    }
    return "login";
  }

  // 用户退出
  public String logout() {
    request = ServletActionContext.getRequest();
    response = ServletActionContext.getResponse();
    HttpSession session = ServletActionContext.getRequest().getSession();
    session = request.getSession(false);
    if (session != null)
      session.removeAttribute(USER_SESSION);
    Cookie cookie = cookieUtils.delCookie(request);
    if (cookie != null)
      response.addCookie(cookie);
    return "login";
  }

  public static void main(String[] args) {
    LoginAction login = new LoginAction();
    try {
      login.execute();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public Map<String, Object> getSession() {
    return session;
  }

  public void setSession(Map<String, Object> session) {
    this.session = session;
  }

  public HttpServletResponse getResponse() {
    return response;
  }

  public void setResponse(HttpServletResponse response) {
    this.response = response;
  }

  public HttpServletRequest getRequest() {
    return request;
  }

  public void setRequest(HttpServletRequest request) {
    this.request = request;
  }

  public boolean isUserCookie() {
    return userCookie;
  }

  public void setUserCookie(boolean userCookie) {
    this.userCookie = userCookie;
  }

  public String getF_loginname() {
    return f_loginname;
  }

  public void setF_loginname(String fLoginname) {
    f_loginname = fLoginname;
  }

  public String getF_password() {
    return f_password;
  }

  public void setF_password(String fPassword) {
    f_password = fPassword;
  }

  public String getValidateCode() {
    return validateCode;
  }

  public void setValidateCode(String validateCode) {
    this.validateCode = validateCode;
  }
}

验证码 ValidataCodeAction ,网上很多验证码的例子,可以选择自己的方式来写验证码


package com.struts.action;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.imageio.stream.ImageOutputStream;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class ValidateCodeAction extends ActionSupport {
  
  private static final long serialVersionUID = 1L;
  private ByteArrayInputStream inputStream;
  private int width;
  private int height;
  private int fontSize;
  private int codeLength;

  public ValidateCodeAction() {
  }

  public void setCodeLength(int codeLength) {
    this.codeLength = codeLength;
  }

  public void setFontSize(int fontSize) {
    this.fontSize = fontSize;
  }

  public void setHeight(int height) {
    this.height = height;
  }

  public void setWidth(int width) {
    this.width = width;
  }

  public ByteArrayInputStream getInputStream() {
    return inputStream;
  }

  public void setInputStream(ByteArrayInputStream inputStream) {
    this.inputStream = inputStream;
  }

  public String execute() throws Exception {
    BufferedImage bimage = new BufferedImage(width, height, 1);
    Graphics g = bimage.getGraphics();
    Random random = new Random();
    g.setColor(getRandomColor(random, 200, 255));
    g.fillRect(0, 0, width, height);
    g.setFont(new Font("Times New Roman", 0, fontSize));
    g.setColor(getRandomColor(random, 160, 200));
    for (int i = 0; i < 155; i++) {
      int x = random.nextInt(width);
      int y = random.nextInt(height);
      int xl = random.nextInt(12);
      int yl = random.nextInt(12);
      g.drawLine(x, y, x + xl, y + yl);
    }

    StringBuffer str = new StringBuffer();
    for (int i = 0; i < codeLength; i++) {
      String randomStr = String.valueOf(random.nextInt(10));
      str.append(randomStr);
      g.setColor(new Color(20 + random.nextInt(110), 20 + random
          .nextInt(110), 20 + random.nextInt(110)));
      int x = (width / codeLength - 1) * i
          + random.nextInt(width / (codeLength * 2));
      int y = random.nextInt(height - fontSize) + fontSize;
      g.drawString(randomStr, x, y);
    }

    ActionContext.getContext().getSession().put("validateCode",
        str.toString());
    g.dispose();
    ByteArrayOutputStream output = new ByteArrayOutputStream();
    ImageOutputStream iout = ImageIO.createImageOutputStream(output);
    ImageIO.write(bimage, "JPEG", iout);
    iout.close();
    output.close();
    ByteArrayInputStream in = new ByteArrayInputStream(output.toByteArray());
    setInputStream(in);
    return "success";
  }

  private Color getRandomColor(Random random, int fc, int bc) {
    if (fc > 255)
      fc = 255;
    if (bc > 255)
      bc = 255;
    int r = fc + random.nextInt(bc - fc);
    int g = fc + random.nextInt(bc - fc);
    int b = fc + random.nextInt(bc - fc);
    return new Color(r, g, b);
  }

}

登录成功页面success.jsp


<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="com.struts.util.CookieUtils"%>
<%@page import="org.apache.commons.lang.xwork.StringUtils"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<%
  String path = request.getContextPath();
  String basePath = request.getScheme() + "://"
      + request.getServerName() + ":" + request.getServerPort()
      + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    <title>success page</title>
  </head>

  <body>
    <%
      Cookie[] cookies = request.getCookies();
      if (cookies != null) {
        for (Cookie cookie : cookies) {
          if (CookieUtils.USER_COOKIE.equals(cookie.getName())) {
            String value = cookie.getValue();
            // 判断字符是否为空
            if (StringUtils.isNotBlank(value)) {
              String[] spilt = value.split(",");
              String loginname = spilt[0];
              String password = spilt[1];
              out.println(loginname + "欢迎登陆");
            }
          }
        }
      }
    %>
    <s:a action="loginAction!logout.action" namespace="/"> 安全退出</s:a>
  </body>
</html>

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