mysql数据库的连接以及增删改查Java代码实现（Statement版）

数据库：

create table t1(id int primary key not null auto_increment,name varchar(32),password varchar(32));

insert into t1(name,password) values("admin","123");
insert into t1(name,password) values("zhangsan","123");
insert into t1(name,password) values("lisi","123");
create table t1(id int primary key not null a