JDBC工具类

JDBCutils

需要导入价包需要在进入下载之前验证是否是人在操作，进入以后搜索mysql，选择MySQL Connector/J 进入下载自己mysql对应版本的价包

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.sql.*;
import java.util.Properties;

public class JDBCUtil {
 private  static Properties pro;

 static {
     try {
         FileInputStream fis = new FileInputStream("C:\\Users\\admin\\IdeaProjects\\java0104\\java.web04\\src\\jdbc.properties");
         pro = new Properties();
         pro.load(fis);
     } catch (Exception e) {
         e.printStackTrace();
     }

 }
 public static Connection getConnection() throws SQLException {
     return DriverManager.getConnection(pro.getProperty("url"),pro);
 }

   public static void close(ResultSet rs, Statement stat, Connection con){
              if(rs!=null){
                  try {
                      rs.close();
                  } catch (SQLException e) {
                      e.printStackTrace();
                  }
              }
       if(stat!=null){
           try {
               stat.close();
           } catch (SQLException e) {
               e.printStackTrace();
           }
       }
       if(con!=null){
           try {
               con.close();
           } catch (SQLException e) {
               e.printStackTrace();
           }
       }
   }
}

文件里面的内容为
**///db4为本地连接的db4数据库
url=jdbc:mysql:///db4?useSSL=false&serverTimezone=UTC&characterEncoding=utf8
user=root
password=123456