完成所有CRUD
（不包含cache）
后续在此版本上进行重构
Merge remote-tracking branch 'origin/master'

Conflicts:
	build.gradle
	src/main/java/ApplicationContext.xml
	src/main/java/com/student/registration/controller/AccountController.java
	src/main/java/com/student/registration/controller/UserController.java
	src/main/java/com/student/registration/dao/ClassListMapper.java
	src/main/java/com/student/registration/mapper/ClassListMapper.xml
	src/main/java/com/student/registration/mapper/UserMapper.xml
	src/main/java/com/student/registration/model/ClassList.java
	src/main/java/com/student/registration/service/impl/ClassListServiceImpl.java
	src/main/java/mybatis-config.xml
	src/main/webapp/WEB-INF/pages/login.jsp
	src/main/webapp/WEB-INF/pages/register.jsp
修复form查询问题
后续在此版本上进行重构