项目1-管理员登录与注销

登录功能开发

页面导入

拷贝静态资源

创建登录页面

相对路径与绝对路径

绝对路径：固定不变的路径。

              c:<u>temp</u>1.<u>jsp</u>

              http://19.168.137.3:8080/xxx/yyy.jsp

              <jsp:forward page="/index"><u></jsp:forward></u>
              
          相对路径：与当前请求所访问的路径相关，是可变的路径。

                   ./1.<u>jsp</u>

                   ../1.<u>jsp</u>

                   ../../1.<u>jsp</u>

                   

                   <a <u>href</u>="./yyy.jsp"><u>xxx</u></a>

                   <a <u>href</u>="../yyy.jsp"><u>xxx</u></a>
                   
          前台路径：浏览器端发起的请求路径。
          
                   不以斜杠开头表示相对路径。

                        <link <u>rel</u>="<u>stylesheet</u>" 
<u>href</u>="static/bootstrap/<u>css</u>/bootstrap.min.css">

                   以斜杠开头，表示从服务器的根(ROOT)进行资源查找。

                        <link <u>rel</u>="<u>stylesheet</u>" 
<u>href</u>="/static/bootstrap/<u>css</u>/bootstrap.min.css">

                   以上下文路径开头，表示从当前应用程序的根（<u>atcrowdfunding</u>-main）进行资源查找。                 

                        <link <u>rel</u>="<u>stylesheet</u>" 
<u>href</u>="${pageContext.request.contextPath}/static/bootstrap/<u>css</u>/bootstrap.min.css">

          后台路径：服务器端发起资源请求路径。

              <jsp:forward page="/index"><u></jsp:forward></u>

项目启动监听器

自定义监听器

package com.atguigu.atcrowdfunding.listener;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.atguigu.atcrowdfunding.util.Const;

/**
 * 监听application对象创建和销毁
 * 
 * @author Administrator
 *
 */
public class SystemUpInitListener implements ServletContextListener {

	Logger log = LoggerFactory.getLogger(SystemUpInitListener.class);

	// 当application销毁时执行销毁方法。
	@Override
	public void contextDestroyed(ServletContextEvent sce) {
		log.debug("当前应用application对象被销毁");
	}

	// 当application创建时执行初始化方法
	@Override
	public void contextInitialized(ServletContextEvent sce) {
		ServletContext application = sce.getServletContext();
		String contextPath = application.getContextPath();
		log.debug("当前应用上下文路径：{}", contextPath);
		application.setAttribute(Const.PATH, contextPath);
	}

}

注册到xml文件中

前端流程业务

登录页面

管理员登录后页面

会员登录后页面

流程图

登录页面--》DispatcherController--》登录页面--》DispatcherController--》service--》DispatcherController--》主页面
展示错误信息

抽取

菜单查询并组装

查询

package com.atguigu.atcrowdfunding.service.impl;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.atguigu.atcrowdfunding.bean.TMenu;
import com.atguigu.atcrowdfunding.mapper.TMenuMapper;
import com.atguigu.atcrowdfunding.service.TMenuService;

@Service
public class TMenuServiceImpl implements TMenuService {

	Logger log = LoggerFactory.getLogger(TMenuServiceImpl.class);
	
	@Autowired
	TMenuMapper menuMapper ;

	@Override
	public List<TMenu> listMenuAll() {

		List<TMenu> menuList = new ArrayList<TMenu>(); //只存放父菜单，但是将children属性赋值
		Map<Integer,TMenu> cache = new HashMap<Integer,TMenu>();
		
		List<TMenu> allList = menuMapper.selectByExample(null);//查询所有菜单
		
		for (TMenu tMenu : allList) {//在所有菜单中的对应号为0的作为一级菜单
			if(tMenu.getPid() == 0) {
				menuList.add(tMenu);
				cache.put(tMenu.getId(), tMenu);
			}
		}
		
		for (TMenu tMenu : allList) {//在所有菜单中的对应号不为0的作为二级菜单
			if(tMenu.getPid() != 0) {
				Integer pid = tMenu.getPid();//得到子菜单的id
				TMenu parent = cache.get(pid);//查询对应的父菜单
				parent.getChildren().add(tMenu); //根据子菜单pid查找父菜单id,然后根据父菜单children属性进行父子关系组合。
			}
		}
		
		log.debug("菜单={}",menuList);
		
		return menuList;
	}

	@Override
	public List<TMenu> listMenuAllTree() {		
		return menuMapper.selectByExample(null);
	}

	@Override
	public void saveTMenu(TMenu menu) {
		menuMapper.insertSelective(menu);
	}

	@Override
	public TMenu getMenuById(Integer id) {
		return menuMapper.selectByPrimaryKey(id);
	}

	@Override
	public void updateTMenu(TMenu menu) {
		menuMapper.updateByPrimaryKeySelective(menu);
	}

	@Override
	public void deleteTMenu(Integer id) {
		menuMapper.deleteByPrimaryKey(id);
	}
	
}

组装

<%@ page language="java" contentType="text/html; 
charset=UTF-8"

    pageEncoding="UTF-8"%>

    

<%@ taglib prefix="c" 
uri="http://java.sun.com/jsp/jstl/core" %>

   

   

   

   

<div class="col-sm-3 col-md-2 sidebar">

     <div class="tree">

          <ul style="padding-left:0px;" 
class="list-group">

              

              <c:forEach items="${menuList}" 
var="parent">

                   <c:if test="${empty parent.children}">              

                        <li class="list-group-item 
tree-closed" >

                             <a 
href="${PATH}/${parent.url}"><i class="${parent.icon 
}"></i> ${parent.name }</a> 

                        </li>

                   </c:if>

                   <c:if test="${not empty 
parent.children}"> 

                        <li class="list-group-item 
tree-closed">

                             <span><i 
class="${parent.icon }"></i> ${parent.name }<span 
class="badge" 
style="float:right">${parent.children.size()}</span></span> 

                             <ul 
style="margin-top:10px;display:none;">

                                  <c:forEach 
items="${parent.children}" var="child">

                                      <li 
style="height:30px;">

                                           <a 
href="${PATH}/${child.url}"><i class="${child.icon 
}"></i> ${child.name }</a> 

                                      </li>

                                  </c:forEach>

                             </ul>

                        </li>

                   </c:if>

              </c:forEach>

          </ul>

     </div>

</div>