分类的生成规则

 /*
        顶级分类默认值:100

        一级分类:101100(自然数增加)

        二级分类:101100100(前6位是父类ID,后3位取当前分类下的最大值加1,从100--999)

        顶级分类:100

        一级分类:101101(自然数增加)

        二级分类:101101100(前6位是父类ID,后3位取当前分类下的最大值加1,从100--999)  

        每个二级分类下可添加900个子类。

 */

 1     //新增分类
 2     public String addCategory(Category cate) {
 3         try {
 4         //1.取模块代码
 5         String parentid=cate.getParentid();
 6         int begin=parentid.length()+1;
 7         String sql1="";
 8         int flag = 0;
 9         //顶级节点为100,一级节点
10         if(parentid.equals("100")){
11             sql1="SELECT (CASE WHEN MAX(TO_NUMBER(CATID)) IS NULL THEN 100 ELSE MAX(TO_NUMBER(CATID)) END)+1 FROM MALL_CATEGORY WHERE PARENTID='100'";
12             log.info("==addCategory:===="+sql1+"========");
13             Long maxcatid=this.getJdbcTemplate().queryForLong(sql1);
14             cate.setCatid(maxcatid.toString());
15             cate.setParentid("100");
16             flag = 3;
17         }
18         //非一级节点
19         else{            
20             sql1 = "select min(catid) from mall_category  where parentid='"+parentid+"' and status=2";
21             Long mincatid=this.getJdbcTemplate().queryForLong(sql1);
22             if(mincatid != 0L){
23                 //使用删除的子分类ID作为新的ID,跟新数据
24                 cate.setCatid(mincatid.toString());
25                 flag = 1;
26             }else{
27                 //获取所有分类ID
28                 List<Category> listCatid = findAllCatid(parentid);
29                 HashSet<String> set = new HashSet<String>();
30                 Category item = null;
31                 if(!StringUtils.isEmpty(listCatid)){
32                     //该父分类下已有子分类,使用未使用过的子分类ID
33                     for(int a = 0 ;a<listCatid.size();a++){
34                         item = listCatid.get(a);
35                         set.add(item.getCatid());
36                     }
37                     for(int a = 101;a <= 1000;a++){
38                         if(a==1000){
39                             flag = 2;
40                             break;
41                         }
42                         if(!set.contains(a+"")){
43                             cate.setCatid(parentid+a);
44                             flag = 3;
45                             break; 
46                          }
47                     }
48                 }else{
49                     //该父分类下首次增加子分类
50                     cate.setCatid(parentid+100);
51                     flag = 3;
52                 }
53             }
54         }
55         //2.取模块顺序
56         String sql2="SELECT (CASE WHEN MAX(TO_NUMBER(LISTORDER)) IS NULL THEN 0 ELSE MAX(TO_NUMBER(LISTORDER)) END)+1 FROM MALL_CATEGORY WHERE parentid='"+cate.getParentid()+"'";
57         log.info("==addCategory:===="+sql2+"========");
58         Integer listorder=this.getJdbcTemplate().queryForInt(sql2);
59         cate.setListorder(listorder);
60         cate.setStatus(1);
61         String sql = "",catid = "";
62         if(flag != 2){
63             if(flag == 3){
64                 //新增
65                 sql = "INSERT INTO MALL_CATEGORY(CATID,CATNAME,PARENTID,LISTORDER,THUMB,STATUS,CATNAME2) VALUES('"+cate.getCatid()+"','"+cate.getCatname()+"','"+cate.getParentid()+"',"+cate.getListorder()+",'"+cate.getThumb()+"',"+cate.getStatus()+",'"+cate.getCatname2()+"')";
66             }else if(flag == 1){
67                 //修改
68                 sql = "update MALL_CATEGORY set CATNAME='"+cate.getCatname()+"',LISTORDER="+cate.getListorder()+",THUMB='"+cate.getThumb()+"',STATUS="+cate.getStatus()+",CATNAME2='"+cate.getCatname2()+"' where catid ='"+cate.getCatid()+"'";
69             }
70             log.info("sql:"+sql);
71             this.getJdbcTemplate().execute(sql);
72             catid = cate.getCatid();
73         }else{
74             catid = "";
75         }
76         return catid;
77         } catch (Exception e) {
78             log.info("==CategoryDao：addCategory==异常=====msg:"+e.getMessage());
79             return "";
80         }
81     }