81,092
社区成员
发帖
与我相关
我的任务
分享我想问一下............
我刚学习jsp
看源程序时看到了这句话：
ResultSetMetaData rsmt=rs.getMetaData();
但是我不明白它是什么意义和作用！
您能告诉我么？
谢谢
看源程序时看到了这句话：
ResultSetMetaData rsmt=rs.getMetaData();
但是我不明白它是什么意义和作用！
您能告诉我么？
谢谢
...全文
请发表友善的回复…
发表回复
HERO2008 2001-09-19
- 打赏
- 举报
谢谢了！！！
lci21 2001-09-19
- 打赏
- 举报
ResultSetMetaData属于java.sql包。
public interface ResultSetMetaData
An object that can be used to get information about the types and properties of the columns in a ResultSet object. The following code fragment creates the ResultSet object rs, creates the ResultSetMetaData object rsmd, and uses rsmd to find out how many columns rs has and whether the first column in rs can be used in a WHERE clause.
ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
boolean b = rsmd.isSearchable(1);
public interface ResultSetMetaData
An object that can be used to get information about the types and properties of the columns in a ResultSet object. The following code fragment creates the ResultSet object rs, creates the ResultSetMetaData object rsmd, and uses rsmd to find out how many columns rs has and whether the first column in rs can be used in a WHERE clause.
ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
boolean b = rsmd.isSearchable(1);
