package traffic;
import java.sql.*;public class TrafficDatabaseCore {
static void getConnection() throws SQLException, InstantiationException, IllegalAccessException, ClassNotFoundException
{
Class.forName("org.postgresql.Driver").newInstance();
Connection conn;
conn = DriverManager.getConnection("jdbc:postgresql://localhost:5432/traffic", "postgres", "******");
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery("select * from test");
while(rs.next())
{
System.out.print(rs.getString(0));
System.out.println(rs.getInt(1));
}
}
}出现异常:org.postgresql.util.PSQLException: 栏位索引超过许可范围:0,栏位数:1。
我使用查询语句"select * from test"在SQL SHELL中查询可以得到正确结果:
test_str | test_int
----------------------+----------
0943111196 | 120
(1 行记录)
我要是调试一下就好了= =!