011.开发RBACModel层（了解某一个用户能使用那些功能）

1.增加rbac.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="rbacmapper">
    <select id="selectNodeByUserId" parameterType="Long" resultType="com.imooc.oa.entity.Node">
        select DISTINCT n.*
        from sys_role_user ru , sys_role_node rn , sys_node n
        where
            ru.role_id = rn.role_id and rn.node_id = n.node_id
          and ru.user_id = #{value}
        order by n.node_code
    </select>
</mapper>

2.在src/main/java/com/imooc/oa/entity下增加Node实体类

package com.imooc.oa.entity;

public class Node {
    private Long nodeId;
    private Integer nodeType;//节点类型 1-模块 2-功能
    private String nodeName;//节点名
    private String url;//页面URL
    private Integer nodeCode;//节点编码
    private Long parentId;//上级编号

    public Long getNodeId() {
        return nodeId;
    }

    public void setNodeId(Long nodeId) {
        this.nodeId = nodeId;
    }

    public Integer getNodeType() {
        return nodeType;
    }

    public void setNodeType(Integer nodeType) {
        this.nodeType = nodeType;
    }

    public String getNodeName() {
        return nodeName;
    }

    public void setNodeName(String nodeName) {
        this.nodeName = nodeName;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public Integer getNodeCode() {
        return nodeCode;
    }

    public void setNodeCode(Integer nodeCode) {
        this.nodeCode = nodeCode;
    }

    public Long getParentId() {
        return parentId;
    }

    public void setParentId(Long parentId) {
        this.parentId = parentId;
    }
}

3.在mybatis-config.xml中注册

 <mapper resource="mappers/rbac.xml"/>

4.在src/main/java/com/imooc/oa/mapper增加RbacMapper

package com.imooc.oa.mapper;

import com.imooc.oa.entity.Node;
import com.imooc.oa.utils.MybatisUtils;

import java.util.List;

public class RbacMapper {
    public List<Node> selectNodeByUserId(Long userId){
        List list = (List)MybatisUtils.executeQuery(sqlSession -> sqlSession.selectList("rbacmapper.selectNodeByUserId", userId));
        return list;
    }
}

5.在src/main/java/com/imooc/oa/service下增加RbacService

package com.imooc.oa.service;

import com.imooc.oa.entity.Node;
import com.imooc.oa.mapper.RbacMapper;

import java.util.List;

public class RbacService {
    private RbacMapper rbacMapper = new RbacMapper();
    public List<Node> selectNodeByUserId(Long userId){
        return rbacMapper.selectNodeByUserId(userId);
    }
}