标签：lan 姓名 ati account 查询 value sele sys name
一.登陆模块
前台提交账号和密码传到后台处理控制层
1.1 首先是控制器
@RequestMapping(value="/studentLogin", method=RequestMethod.POST)
public ModelAndView studentLogin(StudentInfo student, HttpServletRequest request) {
ModelAndView model = new ModelAndView();
StudentInfo loginStudent = studentInfoService.getStudentByAccountAndPwd(student.getStudentAccount());
if(loginStudent == null || !student.getStudentPwd().equals(loginStudent.getStudentPwd())){
model.setViewName("home/suc");
return model;
}
request.getSession().setAttribute("loginStudent", loginStudent);
System.out.println(request.getSession().getAttribute("loginStudent"));
model.setViewName("home/suc");
System.out.println("执行完毕");
return model;
}
}
1.2 在这里会调用服务层
StudentInfo loginStudent = studentInfoService.getStudentByAccountAndPwd(student.getStudentAccount());
1.3 服务层接口
public StudentInfo getStudentByAccountAndPwd(String studentAccount);
1.4 服务层实现
public StudentInfo getStudentByAccountAndPwd(String studentAccount) {
return studentInfoMapper.getStudentByAccountAndPwd(studentAccount);//调用dao接口
}
1.5 数据层接口
public StudentInfo getStudentByAccountAndPwd(String studentAccount);
1.6 数据层实现
<mapper namespace="com.caizhen.weknow.dao.StudentInfoMapper">
<!-- 定义resultMap -->
<resultMap type="com.caizhen.weknow.domain.StudentInfo" id="queryStudent">
<!-- 学号 -->
<id column="studentId" property="studentId"/>
<!-- 学生姓名 -->
<result column="studentName" property="studentName"/>
<!-- 学生账号 -->
<result column="studentAccount" property="studentAccount"/>
<!-- 学生账号密码 -->
<result column="studentPwd" property="studentPwd"/>
<!-- 班级 -->
<!-- 班级自身的属性与数据库字段的映射 -->
<association property="classInfo" javaType="com.caizhen.weknow.domain.ClassInfo">
<id column="classId" property="classId"/>
<result column="className" property="className"/>
</association>
<!-- 年级 -->
<!-- 年级自身的属性与数据库字段的映射 -->
<association property="grade" javaType="com.caizhen.weknow.domain.GradeInfo">
<id column="gradeId" property="gradeId"/>
<result column="gradeName" property="gradeName"/>
</association>
</resultMap>
<select id="getStudentByAccountAndPwd" parameterType="java.lang.String" resultMap="queryStudent">
SELECT a.*,b.className,c.gradeId,c.gradeName FROM StudentInfo a
INNER JOIN ClassInfo b ON a.classId=b.classId
INNER JOIN GradeInfo c ON b.gradeId=c.gradeId
WHERE studentAccount=#{studentAccount}
</select>
</mapper>
二：考试中心模块
<li><a id="examCenter-link" target="home" style="cursor: pointer;"
href="willexams?
classId=${sessionScope.loginStudent.classInfo.classId }&
gradeId=${sessionScope.loginStudent.grade.gradeId }&
studentId=${sessionScope.loginStudent.studentId }"
>考试中心</a></li>
向url:willexams传入三个参数:classId,gradeId,studentId
2.1进入控制器
@RequestMapping("/willexams")
public ModelAndView getStudentWillExam(
@RequestParam("classId") Integer classId,
@RequestParam("gradeId") Integer gradeId,
@RequestParam(value="studentId", required=false) Integer studentId) {
ModelAndView model = new ModelAndView();
model.setViewName("/home/examCenter");
//将classId和gradeId存入map集合中
Map<String, Object> map = new HashMap<String, Object>();
map.put("classId", classId);
map.put("gradeId", gradeId);
List<ExamPlanInfo> examPlans = examPlanInfoService.getStudentWillExam(map);
model.addObject("examPlans", examPlans);
model.addObject("gradeId", gradeId);
return model;
}
2.2 进入服务层接口
public List<ExamPlanInfo> getStudentWillExam(Map<String, Object> map);
2.3进入服务层实现层
public List<ExamPlanInfo> getStudentWillExam(Map<String, Object> map) {
return examPlanInfoMapper.getStudentWillExam(map);
}
2.4 进入数据协议层
public List<ExamPlanInfo> getStudentWillExam(Map<String, Object> map);
2.5 进入数据实现层
<mapper namespace="com.caizhen.weknow.dao.ExamPlanInfoMapper">
<resultMap type="com.caizhen.weknow.domain.ExamPlanInfo" id="queryWillExam">
<id column="examPlanId" property="examPlanId"/>
<result column="beginTime" property="beginTime"/>
<!-- 科目 -->
<association property="course" javaType="com.caizhen.weknow.domain.CourseInfo">
<id column="courseId" property="courseId"/>
<result column="courseName" property="courseName"/>
</association>
<!-- 班级 -->
<association property="clazz" javaType="com.caizhen.weknow.domain.ClassInfo">
<id column="classId" property="classId"/>
</association>
<!-- 试卷 -->
<association property="examPaper" javaType="com.caizhen.weknow.domain.ExamPaperInfo">
<id column="examPaperId" property="examPaperId"/>
<result column="examPaperName" property="examPaperName"/>
<result column="subjectNum" property="subjectNum"/>
<result column="examPaperScore" property="examPaperScore"/>
<result column="examPaperEasy" property="examPaperEasy"/>
<result column="examPaperTime" property="examPaperTime"/>
</association>
</resultMap>
<!-- 查询学生待考信息 -->
<!-- 考试安排表 examplaninfo a-->
<!-- 班级信息表 classinfo b-->
<!-- 年级表 gradeinfo c -->
<!-- 试卷表 exampaperinfo d -->
<!-- 课程表 courseinfo e -->
<!-- 需要的参数
1.a.* 考试安排表所有字段
2.d.examPaperName 试卷名称
3.d.subjectNum 试题号
4.d.examPaperScore 试卷分数
5.d.examPaperEasy 试卷难易度
6.d.examPaperTime 考试时长
5.e.coure.name 课程名称
-->
<select id="getStudentWillExam" parameterType="java.util.Map" resultMap="queryWillExam">
SELECT a.*,d.examPaperName,d.subjectNum,d.examPaperScore,d.examPaperEasy,d.examPaperTime,e.courseName FROM ExamPlanInfo a
INNER JOIN ClassInfo b ON a.classId=b.classId
INNER JOIN GradeInfo c ON b.gradeId=c.gradeId
INNER JOIN ExamPaperInfo d ON a.examPaperId=d.examPaperId
INNER JOIN CourseInfo e ON a.courseId=e.courseId
WHERE a.classId=#{classId} AND b.gradeId=#{gradeId}
</select>
</mapper>
2.6 定向到考试中心界面判断exPlans中的条数是否大于0
<c:when test="${fn:length(examPlans) > 0 }">
如果不是则输出页面
<c:otherwise> <div class="jumbotron"> <h1>暂无待考信息</h1> <p>请等待教师分配</p> </div>
</c:otherwise>
ssm+mysql+jsp打造在线考试系统WeKnow-后端设计
标签：lan 姓名 ati account 查询 value sele sys name
原文地址：https://www.cnblogs.com/cainame/p/10346613.html
