JDBC练习

package cn.itcast.jdbc;

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

public class jdbcDemo1 {
    public static void main(String[] args) {
        Statement stmt=null;
        Connection conn=null;
        try {
            //注册驱动
            Class.forName("com.mysql.jdbc.Driver");
            //定义sql语句
            String sql="insert into account values (null,'王五',3000)";
            //连接数据库，获取Connection对象
            conn = DriverManager.getConnection("jdbc:mysql:///db1","root","root");
            //获取sql对象 Statement
            stmt = conn.createStatement();
            int count = stmt.executeUpdate(sql);
            System.out.println(count);
            if (count>0){
                System.out.println("添加成功");
            }else{
                System.out.println("添加失败");
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            if (stmt!=null){
                try {
                    stmt.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
            if (conn!=null){
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }

    }
}

标签：JDBC,练习,stmt,printStackTrace,sql,catch,null,conn
来源： https://www.cnblogs.com/Sym8023/p/15830295.html