jsp怎么从mysql数据库把树形结构展现出来
数据结构:
root_id | son_id | uid | title  | content | createdate | type | attaches |
+---------+--------+-----+--------+---------+------------+------+----------+
|       0 |      1 |   0 | 欧洲   | aaa     | 1356969600 |    0 |          |
|       1 |      2 |   0 | 法国   | aaa1    | 1356969600 |    0 |          |
|       1 |      3 |   0 | 荷兰   | aaa2    | 1356969600 |    0 |          |
|       0 |      4 |   0 | 美洲   | bbb     | 1356969600 |    0 |          |
|       4 |      5 |   0 | 美国   | bbb1    | 1356969600 |    0 |          |
|       4 |      6 |   0 | 加拿大 | bbb2    | 1356969600 |    0 |          |
|       4 |      7 |   0 | 墨西哥 | bb3     | 1356969600 |    0 |          |
|       1 |      8 |   0 | 英国   | aaa3    | 1356969600 |    0 |          |
|      11 |      9 |   0 | 韩国   | ccc1    | 1356969600 |    0 |          |
|      11 |     10 |   0 | 中国   | ccc2    | 1356969600 |    0 |          |
|       0 |     11 |   0 | 亚洲   | ccc     | 1356969600 |    0 |          |
|      10 |     12 |   0 | 福建省 | c2c01   | 1356969600 |    0 |          |
|      10 |     13 | &