云e办（后端）——根据id查询菜单

云e办（后端）——根据id查询菜单

我们的菜单是分级的。会通过父id去关联，并且对应的id会有对应的权限

一、根据用户id查询列表

代码层从上往下写：controller/service/Mapper/mapperxml…

1、Menu 修改菜单类 pojo/Menu

菜单分两级，一级菜单下面有子菜单，我们修改下Menu对象。
在返回的时候会返回子菜单，添加子菜单的属性：

2、MenuController

@RestController
@RequestMapping("/system/cfg")
public class MenuController {
    @Autowired
    private IMenuService menuService;

    /**
     * 虽然是通过用户id查询菜单列表，但是没有传id
     * 如果用户正常能登录以后，用户的相关信息一般在后端获取的，而不是前端传进来的，可能出问题
     * 通过全局变量获取到，用户id
     */
    @ApiOperation(value = "通过用户Id查询菜单列表")
    @GetMapping("/menu")
    public List<Menu> getMenusByAdminId(){
        return menuService.getMenusByAdminId();
    }
}

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3、MenuService和MenuServiceImpl

public interface IMenuService extends IService<Menu> {

    /**
     * 通过用户id查询菜单列表
     * @return
     */
    List<Menu> getMenusByAdminId();
}
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@Service
public class MenuServiceImpl extends ServiceImpl<MenuMapper, Menu> implements IMenuService {

    @Autowired
    private MenuMapper menuMapper;
    /**
     * 通过用户id查询菜单列表
     * @return
     */
    @Override
    public List<Menu> getMenusByAdminId() {
        /*
        此时要传admin的id了，那么如何获取呢？
         */
        return menuMapper.getMenusByAdminId(
                ((Admin) SecurityContextHolder.getContext().getAuthentication().getPrincipal()).getId());
    }
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4、MenuMapper

@Mapper
public interface MenuMapper extends BaseMapper<Menu> {
    /**
     * 通过用户id查询菜单列表
     */
    List<Menu> getMenusByAdminId(Integer id);

}

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5、MenuMapper.xml

DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xxxx.server.mapper.MenuMapper">

    
    <resultMap id="BaseResultMap" type="com.xxxx.server.pojo.Menu">
        <id column="id" property="id" />
        <result column="url" property="url" />
        <result column="path" property="path" />
        <result column="component" property="component" />
        <result column="name" property="name" />
        <result column="iconCls" property="iconCls" />
        <result column="keepAlive" property="keepAlive" />
        <result column="requireAuth" property="requireAuth" />
        <result column="parentId" property="parentId" />
        <result column="enabled" property="enabled" />
    resultMap>

    <resultMap id="Menus" type="com.xxxx.server.pojo.Menu" extends="BaseResultMap">
        
        <collection property="children" ofType="com.xxxx.server.pojo.Menu">
            <id column="id2" property="id" />
            <result column="url2" property="url" />
            <result column="path2" property="path" />
            <result column="component2" property="component" />
            <result column="name2" property="name" />
            <result column="iconCls2" property="iconCls" />
            <result column="keepAlive2" property="keepAlive" />
            <result column="requireAuth2" property="requireAuth" />
            <result column="parentId2" property="parentId" />
            <result column="enabled2" property="enabled" />
        collection>
    resultMap>

    
    <sql id="Base_Column_List">
        id, url, path, component, name, iconCls, keepAlive, requireAuth, parentId, enabled
    sql>

    
    <select id="getMenusByAdminId" resultMap="Menus">
        SELECT
            DISTINCT
            m1.*,
            m2.id AS id2,
            m2.url AS url2,
            m2.path AS path2,
            m2.component AS component2,
            m2.`name` AS name2,
            m2.iconCls AS iconCls2,
            m2.keepAlive As keepAlive2,
            m2.requireAuth AS requireAuth2,
            m2.parentID AS parentId2,
            m2.enabled AS enabled2
        FROM
            t_menu m1,	--#父菜单
            t_menu m2,	--#子菜单
            t_admin_role ar,	--#用户角色
            t_menu_role mr	    --#菜单角色
        WHERE
            m1.id = m2.parentId     --#父菜单id=子菜单Id
          AND m2.id = mr.mid     -- #子菜单id=菜单角色的菜单id
          AND mr.rid = ar.rid     --#菜单角色的用户id=用户角色的用户id
          AND ar.adminId = #{id}
          AND m2.enabled = TRUE
    select>

mapper>


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6、测试：