连接数据库的小问题

Java code

import java.sql.*;
public class JDBC
{
    public static void main (String[] args) throws Exception{
    Class.forName("com.mysql.jdbc.Driver").newInstance();
    String url = "jdbc:mysql://localhost:3306/Information";
    Connection conn = DriverManager.getConnection(url,"root","123456");
    Statement stat = conn.createStatement();
    ResultSet rs = stat.executeQuery("select * from information where name='zhangsan'");
    String str = rs.getString("name");//把这句注释就没错啦  应该这句是错的
        System.out.println(str);
    rs.close();
    stat.close();
    conn.close();
}
}

Exception in thread "main" java.sql.SQLException: Before start of result set
  at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:910)
  at com.mysql.jdbc.ResultSet.checkRowPos(ResultSet.java:720)
  at com.mysql.jdbc.ResultSet.getStringInternal(ResultSet.java:5624)
  at com.mysql.jdbc.ResultSet.getString(ResultSet.java:5544)
  at com.mysql.jdbc.ResultSet.getString(ResultSet.java:5584)
  at JDBC.main(JDBC.java:10)
我有个information表里面有3个字段 有name,tel,email 
有zhangsan 000000 zhangsan@126.com
请高人指点一下


------解决方案--------------------
rs.next();
 String str = rs.getString("name");//把这句注释就没错啦 应该这句是错的

------解决方案--------------------
楼主漏掉了一句，rs.next()，用来读取结果集的下一条数据，你都没有读，怎么取呢，提示已经给了：
Exception in thread "main" java.sql.SQLException: Before start of result set