递归解决根据父节点遍历权限树菜单的问题--------mysql数据中的树表

select * from pub_entity a start with a.entity_id = 88 connect by prior a.entity_id = a.super_entity_id；

  1 package com.xuwei.oa.entity;
  2 
  3 import java.io.Serializable;
  4 import java.util.Set;
  5 
  6 import javax.persistence.Column;
  7 import javax.persistence.Entity;
  8 import javax.persistence.GeneratedValue;
  9 import javax.persistence.GenerationType;
 10 import javax.persistence.Id;
 11 import javax.persistence.ManyToMany;
 12 import javax.persistence.Table;
 13 
 14 import org.apache.struts2.json.annotations.JSON;
 15 import org.hibernate.annotations.GenericGenerator;
 16 
 17 /**
 18  * 菜单管理实体类
 19  * @author David
 20  *
 21  */
 22 @Entity
 23 @Table(name="t_menu")
 24 public class Menu implements Serializable{
 25     @Id  //设置主键生成策略为手动分配
 26     @GenericGenerator(name="menuGenerator",strategy="assigned")
 27     @GeneratedValue(generator="menuGenerator")
 28     private Long mid;//主键
 29     @Column(name = "name", length = 15)
 30     private String name;//树上的节点的名称
 31     @Column(name = "isParent")
 32     private Boolean isParent;//是否为文件夹节点
 33     @Column(name = "icon", length = 100)
 34     private String icon;//图标图片的路径
 35     @Column(name = "checked", length = 5)
 36     private Boolean checked;
 37     @Column(name = "url", length = 60)
 38     private String url;//单击菜单跳转的action
 39     @Column(name = "target", length = 15)
 40     private String target;//页面显示位置
 41     @Column(name = "pid", length = 5)
 42     private Long pid;//父节点ID
 43     
 44     public Long getMid() {
 45         return mid;
 46     }
 47     public void setMid(Long mid) {
 48         this.mid = mid;
 49     }
 50     public Long getPid() {
 51         return pid;
 52     }
 53     public void setPid(Long pid) {
 54         this.pid = pid;
 55     }
 56     public String getName() {
 57         return name;
 58     }
 59     public void setName(String name) {
 60         this.name = name;
 61     }
 62     public Boolean getIsParent() {
 63         return isParent;
 64     }
 65     public void setIsParent(Boolean isParent) {
 66         this.isParent = isParent;
 67     }
 68     public String getIcon() {
 69         return icon;
 70     }
 71     public void setIcon(String icon) {
 72         this.icon = icon;
 73     }
 74     public Boolean getChecked() {
 75         return checked;
 76     }
 77     public void setChecked(Boolean checked) {
 78         this.checked = checked;
 79     }
 80     public String getUrl() {
 81         return url;
 82     }
 83     public void setUrl(String url) {
 84         this.url = url;
 85     }
 86     public String getTarget() {
 87         return target;
 88     }
 89     public void setTarget(String target) {
 90         this.target = target;
 91     }
 92     
 93     @ManyToMany(mappedBy = "menus")  
 94     private Set<User> users;//角色set集合
 95     @JSON(serialize=false)
 96     public Set<User> getUsers() {
 97         return users;
 98     }
 99     public void setUsers(Set<User> users) {
100         this.users = users;
101     }
102     
103 
104 }

 1     private Session session;
 2     private List<Menu> listMenu=new ArrayList<Menu>();
 3 
 4 
 5     @Test
 6     public void testQueryAllTreeNodesByRootPid(){
 7         List<Menu> res=new ArrayList<Menu>();
 8         session.beginTransaction();
 9 //        vistTreeNodesByPid(6L);
10         vistTreeNodesByPid(6L,res);
11         for(Menu m:res){
12             System.out.println("*****"+m.getName());
13         }
14         session.getTransaction().commit();
15     }
16     
17     public void vistTreeNodesByPid(Long pid,List<Menu> res){
18 //        String hql="from Menu where pid=? order by mid";
19         String hql="from Menu m inner join fetch m.users u where m.pid=? and u.uid=? order by m.mid";
20         Query query=session.createQuery(hql);
21         query.setLong(0, pid);
22         query.setLong(1, 16L);
23         List<Menu> list=query.list();
24         for(Menu m:list){
25             System.out.println(m.getMid()+"--"+m.getName());
26 //            this.listMenu.add(m);
27             res.add(m);
28         }
29         for(Menu m:list){
30             Long tmp_pid=m.getMid();
31             if(tmp_pid!=null){
32                 vistTreeNodesByPid(tmp_pid,res);
33             }
34         }
35     }