javaweb遞迴呼叫封裝樹型結構選單樹(無限層級)
阿新 • • 發佈:2019-01-24
1.先放一張最終結果圖片,如果你認為這主是你要的結果,那請把接著往下看程式碼
2.程式碼為封裝成了一個工具類,有需要的小夥伴直接control+c吧
package com.sunkee.business.admin.common.utils; import com.sunkee.business.admin.common.domain.XTreeGrid; import com.sunkee.business.admin.common.model.ShiroPermissions; import com.sunkee.business.make.utils.StringUtil; import net.sf.json.JSONArray; import java.util.ArrayList; import java.util.List; /** * ☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆ * @developers LONGZHIQIANG * @createtime 2018/11/2 10:36. * @describe 用於封裝樹型結構樹(無限層級) * ☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆ */ public class XTreeKit { public static List<XTreeGrid> formatTree(List<ShiroPermissions> permissions) { List<XTreeGrid> menuList = new ArrayList<XTreeGrid>(); for (ShiroPermissions ps:permissions) { if(ps.getPermParentCode().equals("0")){ //遍歷所有一級節點,並找出所有一級節點下的所有子節點 XTreeGrid grid = getXTreeGrid(ps, permissions); menuList.add(grid); } } return menuList; } /** * 遞迴查詢子選單 */ public static List<XTreeGrid> getChild(String id, List<ShiroPermissions> rootMenu) { List<XTreeGrid> childList = new ArrayList<>(); for (ShiroPermissions root : rootMenu) { // 遍歷所有節點,將父選單編碼與傳過來的編碼進行比較、若相同則繼續檢視該節點下是否還有子節點 if (!StringUtil.isEmpty(root.getPermParentCode())) { if (root.getPermParentCode().equals(id)) { XTreeGrid grid = getXTreeGrid(root, rootMenu); childList.add(grid); } } } return childList; } //構建 XTreeGrid(實體物件) public static XTreeGrid getXTreeGrid(ShiroPermissions ps, List<ShiroPermissions> permissions){ XTreeGrid x = new XTreeGrid(); x.setId(ps.getPermId()); x.setCode(ps.getPermCode()); x.setParenCode(ps.getPermParentCode()); x.setTitle(ps.getPermName()); x.setValue(ps.getPermPermission()); x.setData(getChild(ps.getPermCode(),permissions)); //遞增遍歷所有子節點(無限層級) return x; } }
3.直接呼叫
/** * ☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆ * @developers LONGZHIQIANG * @createtime 2018/10/31 17:56. * @describe 前往新增角色頁面 * ☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆☆☆★☆☆☆☆ */ @RequiresPermissions(PER_ADD) @RequestMapping(value = "/add",method = RequestMethod.GET) public String add(Model model) throws Exception{ List<ShiroPermissions> permissions = shiroPermissionsService.queryPermissionsAll(); List<XTreeGrid> grid = XTreeKit.formatTree(permissions); model.addAttribute("permissions",JSONArray.fromObject(grid)); return TABLE_VIEW+"/role-add"; }
4.java實體類
package com.sunkee.business.admin.common.domain; import java.io.Serializable; import java.util.List; /** * xtree樹形表格基礎物件 * */ public class XTreeGrid implements Serializable{ private static final long serialVersionUID = -9189631784252440402L; public Integer id; //節點id(記錄主健)並不是上下級的ID public String code; //節點code (元素本身編碼用於上下級關連關係) public String parenCode; //節點父Code(與節點code區分上下級關係) public String title; // 顯示的值 (必填 xTree外掛中所需屬性) public String value; // 隱藏的值 (必填 xTree外掛中所需屬性) public Boolean checked = false; //預設是否選中(選填 xTree外掛中所需屬性) true為選中,false與不填都為不選中 public Boolean disabled = false; //是否可用 (選填 xTree外掛中所需屬性) true為不可用,false與不填都為可用 public Boolean expanded = false; //是否展開 (選填 xTree外掛中所需屬性)true為展開,預設為不展開 public List<XTreeGrid> data; //孩子節點 (必填 xTree外掛中所需屬性 沒子節點該值為空集合) public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getParenCode() { return parenCode; } public void setParenCode(String parenCode) { this.parenCode = parenCode; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getValue() { return value; } public void setValue(String value) { this.value = value; } public Boolean getChecked() { return checked; } public void setChecked(Boolean checked) { this.checked = checked; } public Boolean getDisabled() { return disabled; } public void setDisabled(Boolean disabled) { this.disabled = disabled; } public Boolean getExpanded() { return expanded; } public void setExpanded(Boolean expanded) { this.expanded = expanded; } public List<XTreeGrid> getData() { return data; } public void setData(List<XTreeGrid> data) { this.data = data; } }
以上就是所有程式碼,是不是很簡單啊