可滚动的游标记录集JDBC

可滚动的游标记录集
package text;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
public class RollQuery {
public static void main(String[] args) {
final String query = "select * from emp order by deptno";
Connection conn = DBConn.getConnection();
try {
Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); //可滚动的游标选项
ResultSet rs = stmt.executeQuery(query);
ResultSetMetaData rsmd = rs.getMetaData();
int colCount = rsmd.getColumnCount();
while(rs.next()){ //取所有行
for(int i = 0; i < colCount; i++){
System.out.print(rs.getString(i + 1) + "/t");
}
System.out.println();
}
if(rs.first()){ //取第一行
System.out.println("First Row: ");
for(int i = 0; i < colCount; i++){
System.out.print(rs.getString(i + 1) + "/t");
}
System.out.println();
}
if(rs.absolute(5)){ //取绝对行数
System.out.println("5:**************** ");
for(int i = 0; i < colCount; i++){
System.out.print(rs.getString(i + 1) + "/t");
}
System.out.println();
}
if(rs.relative(-2)){ //取相对行数
System.out.println("3:**************** ");
for(int i = 0; i < colCount; i++){
System.out.print(rs.getString(i + 1) + "/t");
}
System.out.println();
}
if(rs.previous()){ //指针前滚
System.out.println("2:**************** ");

for(int i = 0; i < colCount; i++){
System.out.print(rs.getString(i + 1) + "/t");
}
System.out.println();
}
rs.close();
stmt.close();
}
//catch
}