JAVA 直连数据库连接

/*数据库驱动*/
static final String JDBC_DRIVER="com.mysql.cj.jdbc.Driver";
/*数据库url*/
static final String DB_URL="jdbc:mysql://1.1.1.1:3308/ssss_aa_bb?serverTimezone=GMT%2B8&rewriteBatchedStatements=true&allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&useSSL=false";

//数据库名与密码
static final String user="root";
static final String pass="12345678";

public static void main(String[] args){
    Connection conn=null;
    Statement stmt=null;

    try {
        //注册驱动
        Class.forName(JDBC_DRIVER);
        System.out.println("-----连接数据库----");
        //打开连接
        conn= DriverManager.getConnection(DB_URL,user,pass);
        //执行查询user表数据
        stmt=conn.createStatement();
        String sql;
        sql="select OBJECT_ID,SYSUSER_NAME from plat_object_sysuser";
        ResultSet rs=stmt.executeQuery(sql);
        //数据输出
        while(rs.next()){
            int id=rs.getInt("OBJECT_ID" );
            String name=rs.getString("SYSUSER_NAME");
            System.out.println("ID="+id);
            System.out.println("用户名="+name);
            System.out.println();

        }
        //完成并关闭数据库
        rs.close();
        stmt.close();
        conn.close();
        System.out.println("查询结束关闭数据库");

    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }catch (SQLException se){
        se.printStackTrace();
    }
}