Building a Java Tree Structure Using Recursive Algorithms and a Database
Prepare the table structrue and corresponding data a. Table srtucture: create table TB_TREE ( CID NUMBER not null, CNAME VARCHAR2(50), PID NUMBER //parent node ) b. Table data: insert into tb_tree (CID, CNAME, PID) values (1, 'China', 0); insert into tb_tree (CID, CNAME, PID) values (2, 'Beijing',...