前端页面各层的代码

controller

package cn.yzq.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @author Administrator
 *��ת
 */
@Controller
public class JumpController {
@RequestMapping("tomain.do")
public String jumpShow() {
    
    return "show";
}

}

package cn.yzq.controller;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;



import cn.yzq.bean.Login;
import cn.yzq.bean.ReturnModel;
import cn.yzq.service.LoginService;

@RestController
@RequestMapping("/login")
public class Mycontroller {
    @Autowired
    private LoginService loginServiceImpl;
    
    @RequestMapping("empLogin.do")
    public ReturnModel EditEmp(Login log) {
        return loginServiceImpl.login(log);
    }
    
    @RequestMapping("getPermission.do")
    public List<Map<String,Object>> getPermission(){
        return loginServiceImpl.getPermission();
    }
    @RequestMapping("getChildrenPermission.do")
    public List<Map<String,Object>> getChildrenPermission(int pid){
        return loginServiceImpl.getChildrenPermission(pid);
    }
    
    
}

service

package cn.yzq.service.impl;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.yzq.bean.Login;
import cn.yzq.bean.ReturnModel;
import cn.yzq.dao.LoginDao;
import cn.yzq.service.LoginService;
import cn.yzq.utils.EmpUtil;
@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private LoginDao loginDaoImpl;
    @Override
    public ReturnModel login(Login log) {
        Integer id = loginDaoImpl.login(log);
        if (id==null) {
            return new ReturnModel(400, false, "登录账号不存在", null);
        }
        Map empOne = loginDaoImpl.getLoginById(id);
        //当员工的状态栏为空时，说明员工信息已经别注销，请联系管理员
        if ((int)empOne.get("state")==0) {
            return new ReturnModel(300, false, "用户已经被注销，请联系管理员", null);
        }
        EmpUtil.setEmp(empOne);
        return new ReturnModel(200, true, "登录成功哦", null);
    }
    @Override
    public List<Map<String, Object>> getPermission() {
        // TODO Auto-generated method stub
        Map emp = EmpUtil.getEmp();
        return loginDaoImpl.getPermission(emp.get("roleID"));
    }
    @Override
    public List<Map<String, Object>> getChildrenPermission(int pid) {
        // TODO Auto-generated method stub
        Map emp = EmpUtil.getEmp();
        return loginDaoImpl.getChildrenPermission(emp.get("roleID"),pid);
    }

}

dao

package cn.yzq.dao.impl;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import cn.yzq.bean.Login;
import cn.yzq.dao.LoginDao;
import cn.yzq.utils.BaseDao;

@Repository
public class LoginDaoImpl implements LoginDao {
    @Autowired
    private BaseDao baseDao;

    @Override
    public Integer login(Login log) {
        String sql = "select id from login where username=? and password=?";
        List<Map<String, Object>> loginList = baseDao.executeQuery(sql, log.getUsername(), log.getPassword());
        if (loginList.size() > 0) {
            return (Integer) loginList.get(0).get("id");
        }
        return null;
    }

    @Override
    public Map getLoginById(Integer id) {
        String sql = "select * from employee where loginId=?";
        List<Map<String, Object>> empList = baseDao.executeQuery(sql, id);
        return empList.get(0);
    }

    @Override
    public List<Map<String, Object>> getPermission(Object roleID) {
        String sql="select DISTINCT p2.id,p2.name title from role_per rp   LEFT JOIN permission p1   on rp.pid = p1.id   LEFT JOIN permission p2   on p1.parentid = p2.id where rp.rid = ?";
         List<Map<String, Object>> executeQuery = baseDao.executeQuery(sql, roleID);
        return baseDao.executeQuery(sql,roleID);
    }

    @Override
    public List<Map<String, Object>> getChildrenPermission(Object roleID, int pid) {
        String sql="select p.id,p.name text,p.url tsrc from role_per rp LEFT JOIN permission p on rp.pid = p.id where rp.rid = ? and p.parentid = ?";
        return baseDao.executeQuery(sql,roleID,pid);
    }

}

utils中包含BaseDao.java和EmpUtil.java

BaseDao.java

package cn.yzq.utils;

import java.sql.Connection;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
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 javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;


/**
 * @author 陈建
 * @描述：dao基础类
 * 2018-10-25下午2:54:57
 */
@Repository
public class BaseDao {
    private final static Logger logger = LoggerFactory.getLogger(BaseDao.class);
    @Autowired
    private DataSource dataSource;
    //四大金刚
    /*static String driver="com.mysql.jdbc.Driver";
    static String url="jdbc:mysql://localhost:3306/aaa?useSSL=false";
    static String user="root";
    static String password="root";*/
    //加载驱动
    /*static{
        
        try {
            Class.forName(driver);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }*/
    //获取数据库连接
/*    public static Connection getConnection() {
        try {
            return DriverManager.getConnection(url, user, password);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;

    }*/
    public  Connection getConnection() {
        try {
            return  dataSource.getConnection();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
        
    }
    //关闭数据库连接
    /*public static void closeConnection(Connection conn ,PreparedStatement ps ,ResultSet rs) {
        if(rs!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(ps!=null){
            try {
                ps.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

    }*/
    //查询通用方法
    public List<Map<String,Object>> executeQuery(String sql,Object...params) {
        List<Map<String,Object>> objList= new ArrayList<Map<String,Object>>();
        Connection conn = getConnection();
        PreparedStatement ps=null;
        ResultSet rs=null;
        try {
             ps = conn.prepareStatement(sql);
             logger.trace("trace级别的日志："+sql);
             logger.debug("debug级别的日志："+sql);
             logger.info("info级别的日志："+sql);
             logger.warn("warn级别的日志："+sql);
             logger.error("error级别的日志："+sql);
             ps = setParams(ps, params);
             //执行sql
              rs = ps.executeQuery();
              //获取表元数据信息
              ResultSetMetaData metaData = rs.getMetaData();
              //解析结果集
              while(rs.next()){
                  Map<String,Object> row= new HashMap<String, Object>();
                  //metaData.getColumnCount()获取列数
                  for (int i = 0; i < metaData.getColumnCount(); i++) {
                      row.put(metaData.getColumnLabel(i+1), rs.getObject(i+1));
                  }
                  objList.add(row);
              }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                conn.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return objList;

    }
    //增删改通用方法
    public boolean executeUpdate(String sql,Object...params) {
        Connection conn = getConnection();
        PreparedStatement ps=null;
        try {
             ps = conn.prepareStatement(sql);
             
             ps = setParams(ps, params);
             //执行sql
              int ret = ps.executeUpdate();
              if(ret>0){
                  logger.debug("操作成功！");
                  return true;
                           
              }else
              {
                  logger.debug("操作失败！");
                  return false;
              }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                conn.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return false;

    }
    //设值通用方法
    public  PreparedStatement setParams(PreparedStatement ps,Object...params) {
            if(params!=null){
                for (int i = 0; i < params.length; i++) {
                    try {
                        ps.setObject(i+1, params[i]);
                    } catch (SQLException e) {
                        e.printStackTrace();
                    }
                    
                }
            }
            
            return ps;

    }
    

}

EmpUtil.java

package cn.yzq.utils;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;


public final class EmpUtil {

    private static HttpSession getSession() {
        HttpSession session = null;
        try {
            session = getRequest().getSession();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return session;
    }

    /**RequestContextHolder.getRequestAttributes(); 鑾峰彇璇锋眰涓�墍鏈夌殑璇锋眰鏁版嵁 request
     * 閰嶇疆涓�涓�洃鍚�櫒
     * @return
     */
    public static HttpServletRequest getRequest() {
        ServletRequestAttributes attrs = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        return attrs.getRequest();
    }
    
    /**
     * 
     * @param session
     * @return user shiro
     */
    public static Map getEmp() {
        return (Map) getSession().getAttribute("EMP");
    }
    
    /***
     * 
     * @param emp
     */
    public static void setEmp(Map emp) {
        getSession().setAttribute("EMP", emp);
    }

    public static void removeEmp() {
        HttpSession session = getSession();
        session.invalidate();
    }
    
}