day03_1.txt

网络购物系统开发详细步骤

用户登陆

a) 在exception 包中新建 LoginException

package exception;

public class LoginException extends Exception {

  public LoginException() {
  }

  public LoginException(String message) {
    super(message);
  }

  public LoginException(String message, Throwable cause) {
    super(message, cause);
  }

  public LoginException(Throwable cause) {
    super(cause);
  }
}

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b) 在UserMgmSessionFacade中添加userLogin方法，用于用户登陆

    右键点击UserMgmSessionFacade  --> add --> method
     修改：
       name           : userLogin
       return type    ：boolean (成功返回true,失败返回false)
       input parameter: dto.UserDTO user(用户输入的数据) 
       interface      : local

   在UserMgmSessionFacade中添加adminLogin方法，用于管理员登陆
    
    右键点击UserMgmSessionFacade  --> add --> method
     修改：
       name           : adminLogin
       return type    ：boolean (成功返回true,失败返回false)
       input parameter: dto.UserDTO user(用户输入的数据) 
       interface      : local

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c) 为userLogin添加实现体
   --> view bean source
   将userLogin的实现，修改如下：

public boolean userLogin(dto.UserDTO user) 
                               throws LoginException {
  
    try{
      UserLocal local = 
         userLocalHome.findByPrimaryKey(user.getUserId());

      if( user.getPassword().equals( 
                          local.getPassword()) ){
        return true;
      }

      return false;
    }catch( FinderException e ){
      e.printStackTrace();
      throw new LoginException( e.getMessage() );
    }
  }



   为adminLogin添加实现体
   --> view bean source
   将adminLogin的实现，修改如下：

  public boolean adminLogin(dto.UserDTO user) 
                        throws LoginException{
    try{
      AdminLocal local = 
           adminHome.findByPrimaryKey( user.getUserId() );
      if( local.getPassword().equals( 
                       user.getPassword() ) ){
        return true;
      }
      return false;
    }catch( FinderException fe ){
      fe.printStackTrace();
      throw new LoginException( fe.getMessage() );
    }
  }

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d) 修改UserMgmSessionFacadeLocal中的函数声， 使之与bean         class 中的一致 ：

   为userLogin方法，添键throws LoginException
   
   public boolean userLogin(UserDTO user)
                               throws LoginException;

 

   为adminLogin方法，添键throws LoginException
   
   public boolean adminLogin(UserDTO user)
                               throws LoginException;

   

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e) 编译UserMgmSessionFacad

==========================================================

为UserMgmDelegate 添加商业方法 userLogin 用于用户登陆

public boolean userLogin( UserDTO user )
                        throws LoginException{
    return sessionLocal.userLogin( user );
}


为UserMgmDelegate 添加商业方法 adminLogin 用于管理员登陆

public boolean adminLogin( UserDTO user )
                        throws LoginException{
    return sessionLocal.adminLogin( user );
}

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编写用户登陆的页面 index.jsp

a)  name        : index.jsp --> next 
    tagliberary : struts1.1 --> bean , html

b)  在主页的合适位置添加login formj

<html:form action="login.do" method="post"name="loginForm"                             type="ec_port_web.LoginForm">
   <table cellspacing=1 cellpadding=2 width=131
                           align=center height="79">
      <tr>
         <td>用户名</td>
         <td><html:text property="name"/></td>
      </tr>
      <tr>
        <td>密&nbsp;&nbsp;码<div align=center></div></td>
        <td> <html:text property="password"/></td>
      </tr>
      <tr>
        <td colspan=2 height=2>
           <input type="radio" name="USER_TYPE" 
                  id="yh" value="yh" checked>
              <label for="yh"> 用户</label>
           <input type="radio" name="USER_TYPE"                                     value="gly" id="gly">
              <label for="gly"> 管理员</label>
        </td>
      </tr>
      <tr>
         <td colspan=2 height=2 align="center">             <html:submit>登陆</html:submit>
         </td>
      </tr>
   </table>
 </html:form>

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为登陆 form 创建formBean

a) file --> new --> web --> actionForm
   填写
   package    : ec_port_web
   actionForm : ec_port_web.LoginForm

   --> next --> add from jsp  --> index.jsp --> next
   formBean name : loginForm

   （注意：
     actionForm : 对应<html:form>中的type
     formbean name : 对应<html:form>中的name
    ）

package ec_port_web;

import org.apache.struts.action.*;
import javax.servlet.http.*;

public class LoginForm extends ActionForm {
  private String name;
  private String password;
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getPassword() {
    return password;
  }
  public void setPassword(String password) {
    this.password = password;
  }
  public ActionErrors validate(
            ActionMapping actionMapping, 
            HttpServletRequest httpServletRequest) {
   
    return null;
  }
  public void reset(
       ActionMapping actionMapping, 
       HttpServletRequest httpServletRequest) {
    name = null;
    password = null;
  }
}

b) 重写validate 和 reset 方法

c) 编译

d) 察看struts-config.xml原文件

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创建LoginAction 

a) file --> new --> web --> Action
   填写 package : ec_port_web
        Action  : LoginAction
       --> next 
   ActionPath    : /login
   form bean name: loginForm
   scope         : session
   validate      : true
   input jsp     : index.jsp

   其中： 
   ActionPath : Action的侦听路径，与页面form中的Action相
                对应，将.do去掉即可
   form bean name : Action 需要用到的form bean
   scope          ：form bean 放在什么区域
   input jsp      : 请求是由那个页面发送的

   --> finish

b) 为 loginAction  配置forward:
    
   双击struts-config.xml ,进入图形界面
   在走下角展开Action Mapping 选中/login
   在窗口右下方选中forward标签 --> add

   1) path : /index.jsp
      name : fail

   2) path : /userCenter.jsp
      name : success

   3) path : /fail.jsp
      name : systemError

c) 存盘 ， 察看struts-config.xml 源代码

==========================================================
编写userCenter.jsp
==========================================================
实现LoginAction中的perform方法：

package ec_port_web;

import org.apache.struts.action.*;
import javax.servlet.http.*;
import exception.*;
import delegate.*;
import javax.ejb.CreateException;
import dto.UserDTO;

public class LoginAction extends Action {
 
  public ActionForward perform(
           ActionMapping actionMapping,
           ActionForm actionForm, 
           HttpServletRequest request, 
           HttpServletResponse httpServletResponse) {

   LoginForm form = (LoginForm)actionForm;

   try{
     UserMgmDelegate ud = new UserMgmDelegate();
     //判断是否为管理员登陆
     if( request.getParameter( "USER_TYPE" ).
                                     equals("gly") ){
       //执行管理员登陆
       if( ud.adminLogin( new UserDTO( 
                form.getName(),form.getPassword()))){
             //设置登陆标志和管理员身份标志
             request.getSession().setAttribute(
                         "USER_ID", form.getName());
             request.getSession().setAttribute(
                         "IS_ADMIN", "is admin");
           return 
             actionMapping.findForward("loginSuccess");
       }
       else{
         return actionMapping.findForward( "loginFail" );
       }
     }
     //普通用户登陆
     if( ud.userLogin( new UserDTO( 
                 form.getName(),form.getPassword() ) ) ){
       request.getSession().setAttribute(                                       "USER_ID",form.getName());
       return actionMapping.findForward( "loginSuccess" );
     }
     //设置错误类型
     request.setAttribute( "LOGIN_ERROR" , "error");
     return actionMapping.findForward( "loginFail" );
   }catch( ServiceLocatorException se ){
     return actionMapping.findForward( "systemError" );
   }
    catch( CreateException ce ){
      return actionMapping.findForward( "systemError" );
   }
    catch( LoginException  le ) {
      return actionMapping.findForward( "loginFail" );
    }
  }
}

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