JDBC_ResultSet_遍历

package cn.chunzhi.jdbc;

import java.sql.*;

public class Test06_Jdbc_ResultSet_遍历 {
    public static void main(String[] args) {
        ResultSet rs = null;
        Statement stmt = null;
        Connection conn = null;
        try {
            // 1.注册驱动
            Class.forName("com.mysql.jdbc.Driver");
            // 2.获取数据库连接对象
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3305/db2", "root", "root");
            // 3.获取执行sql语句的对象
            stmt = conn.createStatement();
            // 4.定义sql
            String sql = "select * from account";
            // 5.执行sql
            rs = stmt.executeQuery(sql);
            // 6.处理结果
            // 循环判断游标是否是最后一行末尾
            while(rs.next()) {
                // 6.1获取数据
                int id = rs.getInt(1);
                String name = rs.getString("name");
                double balance = rs.getDouble(3);

                System.out.println(id +"------"+ name +"-----"+ balance);
            }
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        } finally {
            // 7.释放资源
            if (rs != null) {
                try {
                    rs.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
            if (stmt != null) {
                try {
                    stmt.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
            if (conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}