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动态生成树形菜单，前台用easyui实现，非常简单不赘述，主要给出后台java的逻辑代码
1 package com.gongli.util.entity.treeMenu; 2 3 4 5 /* 6 * 用于封装树形菜单，无具体表与之对应,根节点为-1，节点0，然后父节点0，节点001,父节点001，节点001001,001002,001...依次类推 7 */ 8 public class TreeMenu { 9 private String parentId;//父节点id 10 private String nodeId;//后代节点id 11 private String perName;//权限名 12 private String icon;//显示节点的图标 13 private String url;//点击树形菜单的叶子节点时，请求的url路径 14 public String getParentId() { 15 return parentId; 16 } 17 public void setParentId(String parentId) { 18 this.parentId = parentId; 19 } 20 public String getNodeId() { 21 return nodeId; 22 } 23 public void setNodeId(String nodeId) { 24 this.nodeId = nodeId; 25 } 26 public String getPerName() { 27 return perName; 28 } 29 public void setPerName(String perName) { 30 this.perName = perName; 31 } 32 public String getIcon() { 33 return icon; 34 } 35 public void setIcon(String icon) { 36 this.icon = icon; 37 } 38 public String getUrl() { 39 return url; 40 } 41 public void setUrl(String url) { 42 this.url = url; 43 } 44 45 46 47 48 49 50 51 }
1 package com.gongli.util.treeMenu; 2 3 import java.util.List; 4 import java.util.Map; 5 6 import com.gongli.util.entity.treeMenu.TreeMenu; 7 /** 8 *树形菜单工具类接口 9 *使用前缀编码，每级增加三个数字，如：第一级 001，第二级001001，第三级001001001,目录根节点为0，目录根节点的父节点为-1 10 */ 11 public interface TreeMenuInteferce { 12 /** 13 * 将树形菜单封装成树 14 * @param list 为树形菜单 15 * @param fid 父id 16 */ 17 public List<Map<String,Object>> createTree(List<TreeMenu> list, String fid); 18 /** 19 * 递归设置TreeMenu树 20 * @param list 21 * @param fid 22 * @return 23 */ 24 public List<Map<String, Object>> createChildren(List<TreeMenu> list, String fid); 25 26 }
1 package com.gongli.util.impl.treeMenu; 2 3 import java.util.ArrayList; 4 import java.util.HashMap; 5 import java.util.List; 6 import java.util.Map; 7 8 import com.gongli.util.entity.treeMenu.TreeMenu; 9 import com.gongli.util.treeMenu.TreeMenuInteferce; 10 11 public class TreeMenuInteferceImpl implements TreeMenuInteferce{ 12 13 /** 14 * 将树形菜单封装成树 15 * @param list 为树形菜单 16 * @param fid 父id 17 */ 18 @Override 19 public List<Map<String,Object>> createTree(List<TreeMenu> list, String fid) { 20 //存放转换后数据的集合 21 List<Map<String,Object>> comboTreeList = new ArrayList<Map<String,Object>>(); 22 for (int i = 0; i < list.size(); i++) { 23 Map<String, Object> map = null; 24 TreeMenu treeMenu = (TreeMenu) list.get(i); 25 if (treeMenu.getParentId().equals(fid)) { 26 map = new HashMap<String, Object>(); 27 //这里必须要将对象角色的id、name转换成Tree在页面的显示形式id、text 28 map.put("id", list.get(i).getNodeId()); //id 29 map.put("text",list.get(i).getPerName()); //权限名 30 map.put("url", list.get(i).getUrl()); 31 map.put("iconCls", list.get(i).getIcon()); 32 map.put("children", createChildren(list, treeMenu.getNodeId())); 33 } 34 if (map != null) 35 comboTreeList.add(map); 36 } 37 return comboTreeList; 38 } 39 40 /** 41 * 递归设置TreeMenu树 42 * @param list 43 * @param fid 44 * @return 45 */ 46 @Override 47 public List<Map<String, Object>> createChildren(List<TreeMenu> list, String fid) { 48 List<Map<String, Object>> childList = new ArrayList<Map<String, Object>>(); 49 for (int j = 0; j < list.size(); j++) { 50 Map<String, Object> map = null; 51 TreeMenu treeChild = (TreeMenu) list.get(j); 52 if (treeChild.getParentId().equals(fid)) { 53 map = new HashMap<String, Object>(); 54 map.put("id", list.get(j).getNodeId()); 55 map.put("text", list.get(j).getPerName()); 56 map.put("url", list.get(j).getUrl()); 57 map.put("iconCls", list.get(j).getIcon()); 58 List<Map<String, Object>> list2 = createChildren(list, treeChild.getNodeId()); 59 //此处一定要注意，easyui中当节点为叶子节点时并且state为closed，该叶子节点会加载整个tree，形成死循环，所以要排除 60 //给叶子节点赋值state:closed,但给非叶子节点赋值state:closed，则默认关闭除了第一个根节点以外的所有节点 61 if(list2.size()>0){ 62 map.put("state", "closed"); 63 } 64 map.put("children", createChildren(list, treeChild.getNodeId())); 65 } 66 if (map != null) 67 childList.add(map); 68 } 69 return childList; 70 } 71 72 73 74 }