public class ConnectDTUINFOTable
{
    static Connection con;
    static Statement stmt;
    public static void doConnect() throws SQLException
    {
        String JDriver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";// SQL数据库引擎
        String connectDB = "jdbc:sqlserver://#{sqlServer的ip:port};DatabaseName=#{数据库名字}";// 数据源
        try {
            Class.forName(JDriver);// 加载数据库引擎，返回给定字符串名的类
        } catch (ClassNotFoundException e) {
            System.out.println("加载数据库引擎失败");
            System.exit(0);
        }
        System.out.println("数据库驱动成功");

        try {
            String user = "#{用户名}";
            String password = "#{密码}";
            con = DriverManager.getConnection(connectDB, user, password);// 连接数据库对象
            System.out.println("连接数据库成功");
            stmt = con.createStatement();
        }
        catch (SQLException e) {
            e.printStackTrace();
            System.out.println("数据库连接错误");
            System.exit(0);
        }
		
		//获取数据表数据
        ResultSet rs = stmt.executeQuery("SELECT * FROM #{数据表} ");
        while (rs.next()) {
            System.out.println(rs.getString("id") + "\t"
                    + rs.getString("站点名称") +
                    "\t\t\t" + rs.getString("区域")
                    + "\t\t\t" +rs.getString("类型")
                    + "\t\t\t" +rs.getString("站点")
                    + "\t\t\t" +rs.getString("项目")
                    + "\t\t\t" +rs.getDouble("上限")
                    + "\t\t\t" +rs.getString("下限")
                    + "\t\t\t" +rs.getString("单位")
                    + "\t\t\t" +rs.getString("数据类型")
            );
        }
        System.out.println("读取完毕");

        stmt.close();
        con.close();
        System.out.println("数据库关闭成功！");
    }

    public static void main(String[] args) {
        try {
            doConnect();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

• resultset.getString()的两种方法

1. getString(int columnIndex)，数据表中的列序号

Connection conn = ……  //省略部分代码
String sql = "SELECT username,pwd FROM myTable";  //定义查询SQL语句
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(sql);
while(rs.next()){
    System.out.println(rs.getString(1));  //获取数据表中第一列数据值
    System.out.println(rs.getString(2));  //获取数据表中第二列数据值
}

2. getString(String columnLabel)，数据表中列名称或别名

Connection conn = ……  //省略部分代码
String sql = "SELECT username,pwd FROM myTable";
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(sql);
while(rs.next()){
    System.out.println(rs.getString("username"));  //获取username列的列值
    System.out.println(rs.getString("pwd"));  //获取pwd列的列值
}