用户权限管理动态显示该用户的有什么权限菜单的.

刺骨的言语ヽ痛彻心扉 2021-09-27 03:54 240阅读 0赞

此时需要 四张表 :

1 用户表(user)

2 菜单表(menu)

3 职位表(posts)

4 职位表和菜单表中间表(post\_menu)

用户表不用多说里面都是个人信息,就是多一个他是什么职位的职位表的ID

![70][]

职位表:

![70 1][]

![70 2][]

菜单表:

![70 3][]

![70 4][]

职位表和菜单表中间表

![70 5][]

![70 6][]

以上就是这几个表设计

其中该职位有什么权限需要在前端去设置一下,然后添加到中间表中.

添加页面

![70 7][]

后台代码Controller:

public void update(Posts p,Integer[] mids,HttpServletResponse response)throws Exception{
    		response.setContentType("text/html;charset=utf-8");	
    		if(p.getPname().equals("系统管理员")){
    			response.getWriter().write("<script>alert('小婊砸,超管岂是你说改就改的?!');location.href='posts_list.action';</script>");
    		}else{
    			int count=postsService.update(p);
    			if(count>0){
    				Integer pId = p.getPid();//得到post的id
    				//先删除原来菜单再执行新增
    				postMenuService.delPostMenu(pId);
    				for (Integer mId : mids) {
    					postMenuService.addPostMenu(pId, mId);
    				}
    				response.getWriter().write("<script>alert('添加成功!');location.href='posts_list.action';</script>");
    			}else{
    				response.getWriter().write("<script>alert('添加失败!');location.href='posts_list.action';</script>");
    			}
    		}
    		
    	}

其中把前台选择的职位和数组菜单添加到中间表中.

此时就是用这个用户去登录.

进入到登录页面,点击登陆后.

后台代码controller:

前面处理代码...

// ----------查询登录用户所对应的菜单集合-------------------
    				Integer postId = users.getUpost();// 获得登录角色ID
    				List<Menu> menus = postsService.getMenusByPostId(postId);
    				session.setAttribute("menus", menus);// 用户菜单存Session

getMengByPostId()方法;

public List<Menu> getMenusByPostId(Integer postId) {
    		List<Menu> menus = new ArrayList<Menu>();
    		PostMenuExample example = new PostMenuExample();
    		example.createCriteria().andPIdEqualTo(postId);
    		//根据职位id查询出PostMenu集合
    		List<PostMenu> pm = postMenuDao.selectByExample(example);
    		for (PostMenu postMenu : pm) {
    			Menu m = menuDao.selectByPrimaryKey(postMenu.getmId());
    			if(m.getmDel()==0){
    				menus.add(m);
    			}
    		}
    		return menus;
    	}

这就后台结束了.返回到前台一个menu信息.

前台处理:

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
    <html>
        <head>
        <base href="<%=basePath%>">
            <meta http-equiv=content-type content="text/html; charset=utf-8" />
            <link href="css/admin.css" type="text/css" rel="stylesheet" />
             <script language=javascript>
             
                function expand(el)
                {
                    childobj = document.getElementById("child" + el);
    
                    if (childobj.style.display == 'none')
                    {
                        childobj.style.display = 'block';
                    }
                    else
                    {
                        childobj.style.display = 'none';
                    }
                    return;
                }
            </script>
        </head>
        <body background=img/menu_bg.jpg >
            <table height="100%" cellspacing=0 cellpadding=0 width=170   background=./img/menu_bg.jpg border=0>
                <tr>
                    <td valign=top align=middle>
                        <table cellspacing=0 cellpadding=0 width="100%" border=0>
    						<tr>
                                <td height=10></td>
    						</tr>
    					</table>
    		<c:forEach items="${sessionScope.menus}" var="m" varStatus="sta">
    				<c:if test="${m.mPareantid==0}">
                        <table cellspacing=0 cellpadding=0 width=150 border=0>
                            <tr height=22>
                                <td style="padding-left: 30px" background=./img/menu_bt.jpg>
    							   <a class=menuparent οnclick="expand(${sta.index})" href="javascript:void(0);">${m.mName}</a>
    							 </td>
    						</tr>
                            <tr height=4>
                                <td></td>
    						</tr>
    					</table>
    				</c:if>
                        <table id="child${sta.index}" cellspacing=0 cellpadding=0  width=150 border=0>
                       
    				<c:forEach  items="${sessionScope.menus}" var="c">
    						    <c:if test="${m.mId==c.mPareantid}">
    							<tr height=20>
    	                            <td align=middle width=30>
    									<img height=9 src="./img/menu_icon.gif" width=9>
    								</td>
    	                            <td>
    									<a class=menuchild  href="${pageContext.request.contextPath}/${c.mUrl}"  target="right">
    									   ${c.mName}
    									</a>
    								</td>
    							</tr>
    							</c:if>
    				</c:forEach>
                            <tr height=4>
                                <td colspan=2></td>
    						</tr>
    					</table>
          </c:forEach>
    				</td>
                    <td width=1 bgcolor=#d1e6f7></td>
                </tr>
                
       </table>
        </body>
    </html>

[70]: /images/20210923/a2c7d140c8284f0498b47dc5d3c708fc.png
[70 1]: /images/20210923/75cad220a4aa4bccb4d5759aeeedfd1a.png
[70 2]: /images/20210923/f5cfd1f9e97047ec9a737e6046a3c249.png
[70 3]: /images/20210923/e9c1d4d157b14c93a8f704d1c8bdaee5.png
[70 4]: /images/20210923/7da1a955f81246ff91cdf33236c44780.png
[70 5]: /images/20210923/decb6f49f0d040b9a35e6a130aca0c3c.png
[70 6]: /images/20210923/2e2ac8af214045c8b45102322796ad52.png
[70 7]: /images/20210923/1ff6df263a884e188449642f3aac589b.png