springboot2.0 集成关系型数据库 jdbc + Mysql

dao:

package com.springboot.dao;

import com.springboot.entity.UserInfo;

/**
 * Created by  lpw'ASUS on 2018/5/30.
 */
public interface UserinfoDao {
    public int insertUserInfo(UserInfo userInfo);
    public int deleteUserInfo(UserInfo userInfo);
    public int uodateUseriNfo(UserInfo userInfo);
    public UserInfo getUserInfo(UserInfo userInfo);
}
package com.springboot.dao;

impo