二星权限设计(用户权限多对多)
1创建dao
package com.houyitao.dao;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import com.houyitao.util.JsonBaseDao;
import com.houyitao.util.JsonUtils;
import com.houyitao.util.PageBean;
import com.houyitao.util.StringUtils;
public class UserDao extends JsonBaseDao {
/**
* 用户登录或者查询用户分页信息的公共分页方法
* @param paMap
* @param pageBean
* @return
* @throws InstantiationException
* @throws IllegalAccessException
* @throws SQLException
*/
public List<Map<String , Object>> list(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql="select * from t_easyui_user_version2 where true";
String uid=JsonUtils.getParamVal(paMap, "uid");
String upwd=JsonUtils.getParamVal(paMap, "upwd");
if(StringUtils.isNotBlank(uid)) {
sql+=" and uid="+uid;
}
if(StringUtils.isNotBlank(uid)) {
sql+=" and upwd="+upwd;
}
return super.executeQuery(sql, pageBean);
}
/**
* 根据当前用户等的id查询对应的菜单
* @param paMap
* @param pageBean
* @return
* @throws InstantiationException
* @throws IllegalAccessException
* @throws SQLException
*/
public List<Map<String , Object>> getMenuByUid(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql="select * from t_easyui_usermenu where true";
String uid=JsonUtils.getParamVal(paMap, "uid");
if(StringUtils.isNotBlank(uid)) {
sql+=" and uid = "+uid;
}
return super.executeQuery(sql, pageBean);
}
}
2.修改原有的dao
package com.houyitao.dao;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.houyitao.entity.TreeNode;
import com.houyitao.util.JsonBaseDao;
import com.houyitao.util.JsonUtils;
import com.houyitao.util.PageBean;
import com.houyitao.util.StringUtils;
public class MenuDao extends JsonBaseDao{
private List<TreeNode> listTreeNode;
/**
* 给前台返回tree_data1.json的字符串
* @param paMap 从前台jsp传递过来的参数集合
* @param pageBean
* @return
* @throws SQLException
* @throws IllegalAccessException
* @throws InstantiationException
*/
public List<TreeNode> listTreeNode(Map<String,String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
List<Map<String, Object>> listMap = this.listMapAuth(paMap, pageBean);
List<TreeNode> listTreeNode=new ArrayList<>();
this.listMapTOListTreeNode(listMap, listTreeNode);
return listTreeNode;
}
public List<Map<String, Object>> listMap(Map<String,String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql="select * from t_easyui_menu where true ";
String menuId= JsonUtils.getParamVal(paMap, "Menuid");
if(StringUtils.isNotBlank(menuId)) {
sql +=" and parentid="+menuId;
}else {
sql +=" and parentid=001";
}
//这里面放的是数据库中的菜单信息
List<Map<String, Object>> listMap=super.executeQuery(sql, pageBean);
return listMap;
}
public List<Map<String, Object>> listMapAuth(Map<String,String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql="select * from t_easyui_menu where true ";
String menuId= JsonUtils.getParamVal(paMap, "Menuid");
// 为什么将menuId改成menuId
// 原因在于之前的方法只能查询当前节点的所有子节点集合,不能将当前节点给查询出来
if(StringUtils.isNotBlank(menuId)) {
sql +=" and menuId in ("+menuId+")";
}else {
sql +=" and menuId=000";
}
//这里面放的是数据库中的菜单信息
List<Map<String, Object>> listMap=super.executeQuery(sql, pageBean);
return listMap;
}
/**
* [{'Menuid' : 001,'Menuname':'学生管理'},{{‘Menuid’:001,'Menuname':'后勤管理'}}]
* -->
* {id:...,text:...}
* @param map
* @param treenode
* @throws SQLException
* @throws IllegalAccessException
* @throws InstantiationException
*/
private void mapTOTreeNode(Map<String, Object> map,TreeNode treenode) throws InstantiationException, IllegalAccessException, SQLException {
treenode.setId(map.get("Menuid")+"");
treenode.setText(map.get("Menuname")+"");
treenode.setAttributes(map);
// 将子节点添加到父节点当中,建立数据之间的父子关系
// treenode.setChildren(children);
Map<String, String[]> childrenMap=new HashMap<>();
childrenMap.put("Menuid", new String[] {treenode.getId()});
List<Map<String, Object>> listMap = this.listMap(childrenMap, null);
List<TreeNode> listTreeNode=new ArrayList<>();
this.listMapTOListTreeNode(listMap, listTreeNode);
treenode.setChildren(listTreeNode);
}
/**
* [{'Menuid' : 001,'Menuname':'学生管理'},{{‘Menuid’:001,'Menuname':'后勤管理'}}]
* -->
* tree_data1.json
* @param listMap
* @param listTreeNode
* @throws SQLException
* @throws IllegalAccessException
* @throws InstantiationException
*/
private void listMapTOListTreeNode(List<Map<String, Object>> listMap,List<TreeNode> listTreeNode) throws InstantiationException, IllegalAccessException, SQLException {
TreeNode treeNode=null;
for (Map<String, Object> map : listMap) {
treeNode=new TreeNode();
mapTOTreeNode(map, treeNode);
listTreeNode.add(treeNode);
}
}
}
3.新增web的方法
package com.houyitao.web;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.houyitao.dao.MenuDao;
import com.houyitao.dao.UserDao;
import com.houyitao.entity.TreeNode;
import com.houyitao.util.ResponseUtil;
import com.zking.framework.ActionSupport;
public class UserAction extends ActionSupport {
private UserDao userDao=new UserDao();
/**
* 登陆成功侯跳转index.jsp
* @param req
* @param resp
* @return
* @throws JsonProcessingException
* @throws Exception
*/
public String menuTree(HttpServletRequest req, HttpServletResponse resp) throws JsonProcessingException, Exception {
try {
//系统中是否有当前登陆用户
Map<String,Object> map=null;
try {
map = this.userDao.list(req.getParameterMap(), null).get(0);
} catch (Exception e) {
return "login";
}
//有:
//查询用户菜单中间表 获取对应的menuid集合
if(map!=null&&map.size()>0) {
StringBuilder sb=new StringBuilder();
List<Map<String, Object>> menuIdArr = this.userDao.getMenuByUid(req.getParameterMap(), null);
for (Map<String, Object> m : menuIdArr) {
sb.append(","+m.get("menuid"));
}
req.setAttribute("menuIds", sb.substring(1));
return "index";
}else {
// 没有
req.setAttribute("msg", "用户或密码输入错误");
return "login";
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
return "login";
}
}
}
4.新增登入界面,跳入前端树形菜单
<?xml version="1.0" encoding="UTF-8" ?>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/userAction.action?methoName=login" method="post">
uid:<input type="text" name="uid"/>
upwd:<input type="text" name="upwd"/>
<input type="submit"/>
</form>
<span style="color: red">${msg}</span>
</body>
</html>
5.mvc.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<config>
<action path="/menuAction" type="com.houyitao.web.MenuAction">
</action>
<action path="/userAction" type="com.houyitao.web.UserAction">
<forward name="index" path="/index.jsp" redirect="false" />
<forward name="login" path="/login.jsp" redirect="false" />
</action>
</config>
结果: