using mysql in java application

最新推荐文章于 2025-08-12 14:33:59 发布

u_know_jay

最新推荐文章于 2025-08-12 14:33:59 发布

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CC 4.0 BY-SA版权

文章标签： mysql application java insert 数据库 jdbc

本文链接：https://blog.youkuaiyun.com/u_know_jay/article/details/2373857

本文介绍如何使用 Java 进行 MySQL 数据库的连接设置，包括必要的驱动安装及代码实现，展示了基本的数据库操作流程。

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the code

下载MYSQL_CONNECTOR包之后,将它放入jre/lib/ext/下

不需修改CLASSPATH和其他任何配置(第三方包我觉得都放在那个目录下).

////

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

class DBConnection {
private static Statement stmt;
private static DBConnection dbCon;
private DBConnection(){
try{Class.forName("com.mysql.jdbc.Driver");
}
catch(ClassNotFoundException e)
{
  System.out.println("数据库驱动加载出错");
}
try{Connection conn =
   DriverManager.getConnection("jdbc:mysql://localhost/design?useUnicode=true&characterEncoding=gb2312&mysqlEncoding=gb2312", "dbname","123456");
          stmt= conn.createStatement();
     }
     catch(SQLException e)
     {
     System.out.println("数据库连接出错OR");

     System.out.println("SQL对象语句创建出错"+e);
     }

}
public static DBConnection getDBCon(){
  dbCon=new DBConnection();
  return dbCon;
}

public Statement getStm()
{
  return stmt;
}
}

/*
//stmt.execute("insert into test (id) values (23)");

//stmt.execute("insert into test id 'UTF8简体中文' ");
   ResultSet rs = stmt.executeQuery("select * from test");
   while(rs.next()){

    System.out.println(rs.getInt(1));
   }
   rs.close();
   conn.close();
} catch( ClassNotFoundException e){System.out.println(e.getMessage());}
   catch (SQLException ex){
    System.out.println("SQLException: " + ex.getMessage());
            System.out.println("SQLState: " + ex.getSQLState());
            System.out.println("VendorError: " + ex.getErrorCode());
   }
}
}