Connection-通过MysqlDriver建立与mysql数据库的连接

1. JAVA通过jdbc与mysql连接
2. Mysql执行传来的sql语句
3. Jdbc返回mysql执行结果
4. Java处理返回结果

//加载驱动
Class.forName(“com.mysql.jdbc.Driver”);
//建立连接
Connection conn=DriverManager.getConnection(“jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8”,”root”,”123456”);
String Sql;
//增删改查的sql语句
Sql=”select * from subject”;
Sql=”insert into subject values(1003,’Dom’,1,3)”;
Sql=”update subject set subjectno=’1003’ where sno=’1002’”;
Sql=”delete from subject where subject=’1003’”;
//数据流工具
Statement st=conn.createStatement();
//ResultSet结果集是一个集合
ResultSet rs=st.executeQuery/Update(sql);
//遍历ResultSet
While(rs.next()){
Syso(rs.getInt(1)+” ”+rs.getString(“subjectname”));
}
//关闭流，后打开的先关闭
Rs.close();
St.close();
Conn.close();