struts2与cookie 实现自动登录和验证码验证实现代码

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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