"syo" Alt + /
https://www.cnblogs.com/UniqueColor/p/5720465.html
spring下载地址
https://repo.spring.io/webapp/#/artifacts/browse/tree/General/libs-release-local/org/springframework/spring
http://maven.springframework.org/release/org/springframework/spring/
commons-httpclient-3.1.jar
http://www.jb51.net/article/86099.htm
https://www.imooc.com/search/?words=ssh
struts2-convention-plugin-2.*.*.*.jar ------是struts2的注解开发jar包
spring-tx-*.*.*.release.jar spring事务类包
c3p0（连接池）