Java JDBC 插入数据

插入数据

考虑我们有下面一个MySQL表：

CREATE TABLE `tutorials_tbl` (
  `tutorial_id` int(11) NOT NULL AUTO_INCREMENT,
  `tutorial_title` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
  `tutorial_author` varchar(40) COLLATE utf8mb4_unicode_ci NOT NULL,
  `submission_date` date DEFAULT NULL,
  PRIMARY KEY (`tutorial_id`)
) ENGINE=InnoDB CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

提示:不熟悉MySQL的同学可以到我们的MySQL教程进行学习。

下面展示向tutorials_tbl表插入三条数据的例子：

import java.sql.*;
 

public class MyClass {
        //驱动字符串
        final static String driverStr="com.mysql.cj.jdbc.Driver";
        final static String dbHost = "192.168.61.125";  // 主机  可为ip地址
        final static String dbUserName = "root";  // 用户
        final static String dbPassword = "123456"; // 密码
        final static String dbPort = "3306"; // 端口
        final static String dbName = "mydb"; // 数据库名
        final static String connStr="jdbc:mysql://"+ dbHost +":"+ dbPort +"/"+ dbName +"?useSSL=false&serverTimezone=UTC"; 
     
    
    public static void main(String[] args){
        MyClass obj = new MyClass();
        Connection conn = obj.connect();
        try {
                String tu1 = "Learn PHP";
                String au1 = "John Poul";
                String dt1 = "2020-02-27";
                
                String tu2 = "Learn MySQL";
                String au2 = "Abdul S";
                String dt2 = "2020-02-27";
                
                String tu3 = "JAVA Tutorial";
                String au3 = "Sanjay";
                String dt3 = "2007-05-06";
                String sqlString = "INSERT INTO tutorials_tbl (tutorial_title , tutorial_author , submission_date) "+ 
                        "VALUES (?,?,?),(?,?,?),(?,?,?)";
                PreparedStatement ps = conn.prepareStatement(sqlString);
                ps.setString(1, tu1);
                ps.setString(2, au1);
                ps.setString(3, dt1);
                ps.setString(4, tu2);
                ps.setString(5, au2);
                ps.setString(6, dt2);
                
                ps.setString(7, tu3);
                ps.setString(8, au3);
                ps.setString(9, dt3);
                
                
                        ps.executeUpdate();
                        System.out.println("执行成功");
                } catch (SQLException e) {
                        System.out.println("执行失败");
                        e.printStackTrace();
                }
    }
    
    // 链接
    protected Connection connect () {
        Connection conn = null;
        try{
              Class.forName(MyClass.driverStr);  // 加载驱动
              conn = DriverManager.getConnection(MyClass.connStr,MyClass.dbUserName,MyClass.dbPassword); // 连接
              System.out.println("连接成功");
            }catch(Exception ex){
              System.out.println("连接失败");
              System.out.println(ex.toString());
        }
        
        return conn;
        }    
    
}

通过编译，运行效果如下：

连接成功
执行成功

提示：不懂编译的同学查看上一章：数据库连接