Java项目实战之在线考试系统的实现（系统介绍）

/*为了方便查询，所以不满足范式要求，但是查询效率很高*/
/*因为表特别多，因此表之间的结构关系就不在详细说明了*/
-- 管理员
CREATE TABLE `admin` (
 `id` varchar(20) NOT NULL COMMENT '管理员账号id',
 `NAME` varchar(20) NOT NULL COMMENT '姓名',
 `sex` varchar(2) NOT NULL COMMENT '性别',
 `age` int(11) DEFAULT NULL COMMENT '年龄',
 `idcard` varchar(20) NOT NULL COMMENT '身份证号',
 `phone` varchar(20) NOT NULL COMMENT '手机号',
 `QQ` varchar(20) DEFAULT NULL COMMENT 'QQ',
 `emai` varchar(20) DEFAULT NULL COMMENT '邮箱',
 `PASSWORD` varchar(20) DEFAULT NULL COMMENT '密码',
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
-- 老师
CREATE TABLE `teacher` (
 `id` varchar(20) NOT NULL,
 `NAME` varchar(20) NOT NULL,
 `sex` varchar(2) NOT NULL,
 `age` int(11) DEFAULT NULL,
 `idcard` varchar(20) NOT NULL,
 `phone` varchar(20) NOT NULL,
 `QQ` varchar(20) DEFAULT NULL,
 `email` varchar(20) DEFAULT NULL,
 `PASSWORD` varchar(20) DEFAULT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
-- 学生
CREATE TABLE `student` (
 `id` varchar(20) NOT NULL,
 `classesId` int(11) DEFAULT NULL,
 `name` varchar(20) NOT NULL,
 `sex` varchar(2) NOT NULL,
 `age` int(11) DEFAULT NULL,
 `idcard` varchar(20) NOT NULL,
 `phone` varchar(20) NOT NULL,
 `QQ` varchar(20) DEFAULT NULL,
 `email` varchar(20) DEFAULT NULL,
 `password` varchar(20) DEFAULT NULL,
 `classesName` varchar(20) DEFAULT NULL,
 PRIMARY KEY (`id`),
 KEY `FK_studentClasses` (`classesId`),
 CONSTRAINT `FK_studentClasses` FOREIGN KEY (`classesId`) REFERENCES `classes` (`classesId`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
-- 科目
CREATE TABLE `subject` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `NAME` varchar(20) NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=29 DEFAULT CHARSET=utf8
-- 章节
CREATE TABLE `chapter` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `sub_id` int(11) NOT NULL,
 `NAME` varchar(255) DEFAULT NULL,
 `title` varchar(255) DEFAULT NULL,
 PRIMARY KEY (`id`),
 KEY `FK_subjectChaper` (`sub_id`),
 CONSTRAINT `FK_subjectChaper` FOREIGN KEY (`sub_id`) REFERENCES `subject` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=189 DEFAULT CHARSET=utf8
--班级
CREATE TABLE `classes` (
 `classesId` int(11) NOT NULL AUTO_INCREMENT,
 `classesName` varchar(20) NOT NULL,
 `grade` varchar(20) NOT NULL,
 PRIMARY KEY (`classesId`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8
--科目班级映射表
CREATE TABLE `subjectclasses` (
 `classesId` int(11) NOT NULL,
 `id` int(11) NOT NULL,
 PRIMARY KEY (`classesId`,`id`),
 KEY `FK_subjectClasses2` (`id`),
 CONSTRAINT `FK_subjectClasses` FOREIGN KEY (`classesId`) REFERENCES `classes` (`classesId`),
 CONSTRAINT `FK_subjectClasses2` FOREIGN KEY (`id`) REFERENCES `subject` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
--老师班级表
CREATE TABLE `teacher_classes` (
 `id` varchar(20) NOT NULL,
 `classesId` int(11) NOT NULL,
 `subId` int(11) NOT NULL,
 PRIMARY KEY (`id`,`classesId`,`subId`),
 KEY `FK_teacher_classes2` (`classesId`),
 KEY `FK_teacher_classes3` (`subId`),
 CONSTRAINT `FK_teacher_classes` FOREIGN KEY (`id`) REFERENCES `teacher` (`id`),
 CONSTRAINT `FK_teacher_classes2` FOREIGN KEY (`classesId`) REFERENCES `classes` (`classesId`),
 CONSTRAINT `FK_teacher_classes3` FOREIGN KEY (`subId`) REFERENCES `subject` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
-- 老师科目表
CREATE TABLE `teacher_subject` (
 `id` varchar(20) NOT NULL,
 `sub_id` int(11) NOT NULL,
 PRIMARY KEY (`id`,`sub_id`),
 KEY `FK_teacher_subject2` (`sub_id`),
 CONSTRAINT `FK_teacher_subject` FOREIGN KEY (`id`) REFERENCES `teacher` (`id`),
 CONSTRAINT `FK_teacher_subject2` FOREIGN KEY (`sub_id`) REFERENCES `subject` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
--发布考试表
CREATE TABLE `publishexam` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `admin_id` varchar(20) NOT NULL,
 `publishTime` datetime NOT NULL,
 `subject_id` int(11) NOT NULL,
 `examTime` datetime NOT NULL,
 `description` text,
 `exam` text,
 `examType` varchar(20) DEFAULT NULL,
 `STATUS` int(11) DEFAULT NULL,
 `admin_name` varchar(20) NOT NULL,
 `subject_name` varchar(20) NOT NULL,
 `examlength` int(11) NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=14 DEFAULT CHARSET=utf8
-- 学生考试记录表
CREATE TABLE `examhis` (
 `studentId` varchar(20) NOT NULL,
 `studentName` varchar(20) DEFAULT NULL,
 `subjectId` int(11) NOT NULL,
 `subjectName` varchar(20) DEFAULT NULL,
 `classesId` int(11) DEFAULT NULL,
 `classesName` varchar(20) DEFAULT NULL,
 `examTime` datetime NOT NULL,
 `score` int(11) DEFAULT NULL,
 `examTest` text,
 `status` int(11) NOT NULL DEFAULT '0',
 `publishExamId` int(11) NOT NULL,
 PRIMARY KEY (`studentId`,`subjectId`,`examTime`),
 CONSTRAINT `FK_stu_his` FOREIGN KEY (`studentId`) REFERENCES `student` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
-- 试题模块表 （选择题，填空题等）
CREATE TABLE `textmodel` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `textType` varchar(20) NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8
-- 试题表
CREATE TABLE `text` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `Tex_id` int(11) NOT NULL,
 `title` varchar(200) NOT NULL,
 `answer` varchar(200) NOT NULL,
 `diffculty` int(11) NOT NULL,
 `modelName` varchar(200) DEFAULT NULL,
 `subjectName` varchar(200) DEFAULT NULL,
 `subjectId` int(11) NOT NULL,
 `chapterId` int(11) DEFAULT NULL,
 `chapterName` varchar(200) NOT NULL,
 `type1` varchar(200) DEFAULT NULL,
 `type2` varchar(200) DEFAULT NULL,
 `type3` varchar(200) DEFAULT NULL,
 `type4` varchar(200) DEFAULT NULL,
 PRIMARY KEY (`id`),
 KEY `FK_text_type` (`Tex_id`),
 CONSTRAINT `FK_text_type` FOREIGN KEY (`Tex_id`) REFERENCES `textmodel` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=306 DEFAULT CHARSET=utf8