添加数据总览功能

src/main/java/com/template/model/vo/StudentRegisterVo.java

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+package com.template.model.vo;public class StudentRegisterVo {
+}

src/main/java/com/template/model/vo/StudentSexRatioVo.java

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+package com.template.model.vo;public class StudentSexRatioVo {
+}

src/main/java/com/template/model/vo/StudentStayVo.java

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+package com.template.model.vo;public class StudentStayVo {
+}

src/main/java/com/template/model/vo/StudentTrafficVo.java

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+package com.template.model.vo;public class StudentTrafficVo {
+}