mysql(26) : mysql8轻量java工具类

maven依赖

        
            mysql
            mysql-connector-java
            8.0.18
        

import java.sql.*;
import java.util.LinkedList;
import java.util.List;

/**
 * @Auther: liyue
 * @Date: 2021/4/21 18:10
 * @Description:
 */
public class MysqlUtil {

    private static final String driver = "com.mysql.cj.jdbc.Driver";
    // 获取mysql连接地址
    private static final String url = "jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&useSSL=false&characterEncoding=utf-8&serverTimezone=GMT%2b8&allowMultiQueries=true";
    // 数据名称
    private static final String username = "root";
    // 数据库密码
    private static final String password = "123456";

    private static Connection conn;

    static {
        try {
            conn = DriverManager.getConnection(url, username, password);
        } catch (Exception e) {
            System.err.println("连接池获取失败");
            throw new RuntimeException(e);
        }
    }


    public static void execute(String sql) {
        try (Statement statement = conn.createStatement();) {
            Class.forName(driver);
            statement.execute(sql);
        } catch (Exception e) {
            System.err.println(sql);
            throw new RuntimeException(e);
        }
    }


    public static void close() {
        try {
            conn.close();
        } catch (Exception e) {
            System.err.println("连接关闭失败");
            throw new RuntimeException(e);
        }
    }

    public List> query(String sql) {
        List> lists = new LinkedList<>();
        long startTime = System.currentTimeMillis();
        try (PreparedStatement ps = conn.prepareStatement(sql);
             ResultSet rs = ps.executeQuery()) {
            List