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Dao.javapackage com.bdqn.dao;import java.util.List;import com.bdqn.entity.Student;public interface Dao { //增加 int insert(Student stu); //删除 int delete(Student stu); //修改 int upd

Dao.javapackage com.bdqn.dao;import java.util.List;import com.bdqn.entity.Student;public interface Dao { //增加 int insert(Student stu); //删除 int delete(Student stu); //修改 int upd

在tomcat中配置Mysql数据库连接池