一，设置免费的java空间
二，过程设置
1，创建命名空间kang
2,创建空间项目
项目代码的连接地址：
https://github.com/tomek-servlets/db-servlet-connection-pool
A new persistent JWS application for Apache Tomcat 8 (using MySQL) has been created in your project. The username/password for administering your JWS is GPOjGLI2/GCti4WBL. For accessing the MySQL database "root" use the credentials <div class="blockcode"><blockquote>user1L8/GBnU4cEo. Please be sure to create the secret named "jws-app-secret" containing the server.crt file used for serving secure content.
3,打开空间制作秘钥:jws-app-secret
4，创建数据库
cd /
ls
cd tmp
mkdir data
cd data
curl https://raw.githubusercontent.com/tomek-servlets/db-servlet-connection-pool/master/SQL/lllc.sql --output lllc.sql
ls
cat lllc.sql
//账号密码之前获取user1L8/GBnU4cEo
mysql -u user1L8 -p root//执行数据库
source lllc.sql