数据库和java连接（eclipse）访问可滚动的结果集

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_38224607/article/details/80263575

package cn.itcast.ch10.demo;


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;


/*
 * 访问可滚动的结果集
 */
public class Example03 {


public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
//1. 加载驱动程序
Class.forName("com.mysql.jdbc.Driver");
//数据库的url
String url = "jdbc:mysql://localhost:3306/ch10";
//数据库用户名
String user = "root";
//数据库密码
String password = "111";
//2.获取数据库连接对象
conn = DriverManager.getConnection(url, user, password);
//3.获取可滚动的语句对象
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
String sql = "select * from users";
//4.发送sql语句，执行返回结果集
rs = stmt.executeQuery(sql);
//将光标定位到第3行
rs.absolute(3);
//打印第三行中name字段的值
System.out.println(rs.getString("name"));
//将光标向上移动一行
rs.previous();
//打印第二行中name字段的值
System.out.println(rs.getString("name"));
//将光标移动到最后一行
rs.last();
//打印最后一行中name字段的值
System.out.println(rs.getString("name"));
//将光标定位到第一行之前
rs.beforeFirst();
//将光标下移一行
rs.next();
//打印第一行name字段的值
System.out.println(rs.getString("name"));
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
//6.释放资源
if(rs!=null){
try {
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
rs = null;
}

if(stmt!=null){
try {
stmt.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
stmt = null;
}

if(conn!=null){
try {
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
conn = null;
}

}



}


}