使用Jquery+bootstrap无限级菜单树

无限级菜单树的实现

项目地址：https://github.com/EnTaroAdunZ/MenuTree.git

效果

从数据库提取出来的原始数据

前台代码需要的数据

{
    "code": 100,
    "extend": {
        "children": [
            {
                "children": [
                    {
                        "children": [
                            {
                                "children": [],
                                "id": "4",
                                "parentId": "2",
                                "text": "用户管理" },
                            {
                                "children": [],
                                "id": "5",
                                "parentId": "2",
                                "text": "角色管理" },
                            {
                                "children": [ { "children": [], "id": "7", "parentId": "6", "text": "权限增加" }, { "children": [], "id": "8", "parentId": "6", "text": "权限删除" } ],
                                "id": "6",
                                "parentId": "2",
                                "text": "权限管理" }
                        ],
                        "id": "2",
                        "parentId": "1",
                        "text": "权限系统"
                    },
                    {
                        "children": [
                            {
                                "children": [],
                                "id": "9",
                                "parentId": "3",
                                "text": "轮播图管理" },
                            {
                                "children": [],
                                "id": "10",
                                "parentId": "3",
                                "text": "商品管理" }
                        ],
                        "id": "3",
                        "parentId": "1",
                        "text": "内容管理"
                    }
                ],
                "id": "1",
                "parentId": "1",
                "text": "主菜单"
            }
        ]
    },
    "msg": "操作成功"
}

后台转换过程

BuildTree类

public class BuildTree {
    public static  List> build(List> nodes) {

        if (nodes == null) {
            return null;
        }
        List> topNodes = new ArrayList<>();

        for (Tree children : nodes) {

            String pid = children.getParentId();
            if (pid.equals(children.getId() ) || "0".equals(pid)) {
                topNodes.add(children);
                continue;
            }
            for (Tree parent : nodes) {
                String id = parent.getId();
                if (id != null && id.equals(pid)) {
                    parent.getChildren().add(children);
                }
            }
        }

        return topNodes;
    }


}

Tree

public class Tree<T> {
    /**
     * 节点ID
     */
    private String id;
    /**
     * 显示节点文本
     */
    private String text;
    /**
     * 节点的子节点
     */
    private List> children = new ArrayList>();

    /**
     * 父ID
     */
    private String parentId;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    public List> getChildren() {
        return children;
    }

    public void setChildren(List> children) {
        this.children = children;
    }

    public String getParentId() {
        return parentId;
    }

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

MenuDto类

public class MenuDto {
    private Long id;
    private Long parent_id;
    private String menuNmae;

    public MenuDto(Long id, String menuNmae, Long parent_id) {
        this.id = id;
        this.parent_id = parent_id;
        this.menuNmae = menuNmae;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Long getParent_id() {
        return parent_id;
    }

    public void setParent_id(Long parent_id) {
        this.parent_id = parent_id;
    }

    public String getMenuNmae() {
        return menuNmae;
    }

    public void setMenuNmae(String menuNmae) {
        this.menuNmae = menuNmae;
    }
}

controller中的代码

 public Msg initMenu(){
        ModelAndView modelAndView=new ModelAndView("/main/index");
        List> trees = new ArrayList>();
        List menuDtoList = new ArrayList();
        menuDtoList.add(new MenuDto(1L,"主菜单",1L));
        menuDtoList.add(new MenuDto(2L,"权限系统",1L));
        menuDtoList.add(new MenuDto(3L,"内容管理",1L));
        menuDtoList.add(new MenuDto(4L,"用户管理",2L));
        menuDtoList.add(new MenuDto(5L,"角色管理",2L));
        menuDtoList.add(new MenuDto(6L,"权限管理",2L));
        menuDtoList.add(new MenuDto(7L,"权限增加",6L));
        menuDtoList.add(new MenuDto(8L,"权限删除",6L));
        menuDtoList.add(new MenuDto(9L,"轮播图管理",3L));
        menuDtoList.add(new MenuDto(10L,"商品管理",3L));

        for (MenuDto test : menuDtoList) {
            Tree tree = new Tree();
            tree.setId(test.getId().toString());
            tree.setParentId(test.getParent_id().toString());
            tree.setText(test.getMenuNmae());
            trees.add(tree);
        }
        List> children=BuildTree.build(trees);
        return Msg.success().add("children",children);
    }

Jquery代码

$(document).ready(function () {
    var isFirstMenu;

    var menulist ={"code":100,"msg":"操作成功","extend":{"children":[{"id":"1","text":"主菜单","children":[{"id":"2","text":"权限系统","children":[{"id":"4","text":"用户管理","children":[],"parentId":"2"},{"id":"5","text":"角色管理","children":[],"parentId":"2"},{"id":"6","text":"权限管理","children":[{"id":"7","text":"权限增加","children":[],"parentId":"6"},{"id":"8","text":"权限删除","children":[],"parentId":"6"}],"parentId":"2"}],"parentId":"1"},{"id":"3","text":"内容管理","children":[{"id":"9","text":"轮播图管理","children":[],"parentId":"3"},{"id":"10","text":"商品管理","children":[],"parentId":"3"}],"parentId":"1"}],"parentId":"1"}]}};
    $(window).load(function(){
        var showlist = $("
");
        $("
主导航
").appendTo(showlist);
        isFirstMenu=menulist.extend.children.length;
        showall(menulist.extend.children, showlist);
        $("#div_menu").append(showlist);
    });
     function showall(menu_list, parent) {
        for (var menu in menu_list) {
            if (menu_list[menu].children.length > 0) {
                var li = $("
");
                if(isFirstMenu==0){
                    li = $("
");
                }else{
                    li = $("
");
                    isFirstMenu=isFirstMenu-1;
                }
                $(li).append(" "+menu_list[menu].text+"");
                var nextParent=$("
");
                $(nextParent).appendTo(li);
                $(li).appendTo(parent);
                showall(menu_list[menu].children, nextParent);
            }
            else {
                $("
"
                    +menu_list[menu].text
                    +"
").appendTo(parent);
            }
        }
    }

});