<分区>
我尝试从数据库中获取一些数据。连接方法肯定有效，但我在从数据库获取任何数据时遇到问题:
SQLConnect s = new SQLConnect();
Connection c = s.getConnection();
Statement st = c.createStatement();
ResultSet rs = st.executeQuery("select * from produkty");
System.out.println(rs.getString(2));
问题出在最后一行(当我评论它时，没有出现错误)。 错误信息:
Connected to database
Exception in thread "main" java.sql.SQLException: Before start of result set
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.ResultSetImpl.checkRowPos(ResultSetImpl.java:841)
at com.mysql.jdbc.ResultSetImpl.getStringInternal(ResultSetImpl.java:5656)
at com.mysql.jdbc.ResultSetImpl.getString(ResultSetImpl.java:5576)
at antmedic.Main.main(Main.java:85)
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)
感谢您的帮助