java中树形菜单对象 超、凢脫俗 2022-12-19 03:37 150阅读 0赞 ### 文章目录 ### * * 1,SysMenu * 2, TreeNode * 3,SysMenuServiceImpl * 4,测试 ## 1,SysMenu ## package com.zy.shiro.domain; import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.annotation.TableField; import com.baomidou.mybatisplus.annotation.TableId; import com.fasterxml.jackson.annotation.JsonInclude; import io.swagger.annotations.ApiModel; import lombok.Data; import lombok.EqualsAndHashCode; import lombok.experimental.Accessors; import java.io.Serializable; import java.util.ArrayList; import java.util.List; /** * sys_menu * @author */ @Data @EqualsAndHashCode(callSuper = false) @Accessors(chain = true) @ApiModel(value="SysMenu对象", description="菜单管理") public class SysMenu implements Serializable { @TableId(value = "menu_id", type = IdType.AUTO) private Long menuId; /** * 父菜单id,父菜单为0 */ private Long parentId; /** * 菜单名称 */ private String menuName; /** * 菜单url */ private String url; /** * 授权(多个用逗号分隔,如:user:list,user:create) */ private String permisions; /** * 类型 0:目录 1:菜单 2:按钮 */ private Integer menuType; /** * 菜单图标 */ private String icon; /** * 排序 */ private Integer orderNum; @TableField(exist = false) private List<SysMenu> list; // @JsonInclude(value = JsonInclude.Include.NON_EMPTY) // private List<SysMenu> child=new ArrayList<>(); private static final long serialVersionUID = 1L; } ## 2, TreeNode ## package com.zy.common.tree; import com.fasterxml.jackson.annotation.JsonInclude; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import sun.reflect.generics.tree.Tree; import java.io.Serializable; import java.util.ArrayList; import java.util.List; @Data @AllArgsConstructor @NoArgsConstructor public class TreeNode implements Serializable { private Integer id; private Integer pid; private String title; private String icon; private String href; private String target; private Boolean spread; @JsonInclude(value = JsonInclude.Include.NON_EMPTY) private List<TreeNode> child=new ArrayList<>(); /** * 登陆成功之后系统主而需要的菜单树的json对象构造器 * @param id * @param pid * @param title * @param icon * @param href * @param target * @param spread */ public TreeNode(Integer id, Integer pid, String title, String icon, String href, String target, Boolean spread) { this.id = id; this.pid = pid; this.title = title; this.icon = icon; this.href = href; this.target = target; this.spread = spread; } public static class TreeNodeBuilder{ /** * * @param treeNodes 要生成有层级关系的源数据 * @param topId 最顶层的pid 根节点的pid * @return */ public static List<TreeNode> build(List<TreeNode> treeNodes,Integer topId){ List<TreeNode> nodes=new ArrayList<>(); for (TreeNode n1 : treeNodes) { if(n1.getPid().equals(topId)){ //说明n1节点是 nodes.add(n1); } for (TreeNode n2 : treeNodes) { if(n2.getPid().equals(n1.getId())){ //说明n2是n1的子节点 应该放到n1的clild里面 n1.getChild().add(n2); } } } return nodes; } } } ## 3,SysMenuServiceImpl ## 根据用户id查询该用户所拥有的菜单 // 1 用户的id 查询角色 List<Object> roleIds = sysUserRoleMapper.selectObjs(new LambdaQueryWrapper<SysUserRole>().select( SysUserRole::getRoleId ). eq(SysUserRole::getUserId, userId) ); if (roleIds == null || roleIds.isEmpty()) { return menuAuthResult; } // 2 通过角色的id 查询菜单的id List<Object> menuIds = sysRoleMenuMapper.selectObjs(new LambdaQueryWrapper<SysRoleMenu>().select( SysRoleMenu::getMenuId ).in(SysRoleMenu::getRoleId, roleIds) ); if (menuIds == null || menuIds.isEmpty()) { return menuAuthResult; } // 3 通过菜单的Id 查询菜单的数据 List<SysMenu> sysMenus = sysMenuMapper.selectList(new LambdaQueryWrapper<SysMenu>().in(SysMenu::getMenuId, menuIds)); if (sysMenus == null || sysMenus.isEmpty()) { return menuAuthResult; } 查询出来的menu集合: ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjIzNDQ3_size_16_color_FFFFFF_t_70_pic_center] ## 4,测试 ## @Test public void test3() { SysUser sysUser = sysUserMapper.selectById(1); List<SysMenu> menuList = null; if (null != sysUser) { menuList = this.sysMenuService.queryeMenuByUserIdForList(sysUser.getUserId()); List<com.zy.common.tree.TreeNode> treeNodes=new ArrayList<>(); for (SysMenu m : menuList) { treeNodes.add(new com.zy.common.tree.TreeNode(m.getMenuId().intValue(),m.getParentId().intValue(),m.getMenuName(),m.getIcon(),m.getUrl(),"_self",Boolean.TRUE)); } List<com.zy.common.tree.TreeNode> build = com.zy.common.tree.TreeNode.TreeNodeBuilder.build(treeNodes, 0); System.out.println(build); treeNodes: ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjIzNDQ3_size_16_color_FFFFFF_t_70_pic_center 1] buid后的树形结构: ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjIzNDQ3_size_16_color_FFFFFF_t_70_pic_center 2] [watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjIzNDQ3_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/b9c0767fbcba40028d55ed1194d1dfcc.png [watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjIzNDQ3_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221120/f9ae4bded82a47b685b3b7f34ab12df1.png [watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjIzNDQ3_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221120/c5be87fe7e474c019346fe90ae9275fa.png
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