JavaEE_WebApp_JDBC 数据库创建： create database HomeworkManager; use homeworkmanager; create table student ( StudentId varchar(20) primary key, StudentName varchar(20)not null, StudentPassword varchar(20) not null, StudentClass varchar(20) not null, StudentCreateTime varchar(20) not null ); create table teacher ( TeacherId varchar(20) primary key, TeacherName varchar(20) not null, TeacherPassword varchar(20) not null, TeacherCreateTime varchar(20) not null ); create table course ( CourseId varchar(20) primary key, CourseName varchar(20) not null, CourseTeacherId varchar(20) not null, CourseCreateTime varchar(20) not null, foreign key(CourseTeacherId)references teacher(TeacherId) ); create table class ( ClassId varchar(20) primary key, ClassName varchar(20) not null, ClassCreateTime varchar(20) not null ); create table course_class ( KeyId varchar(20) primary key, ClassId varchar(20) not null, CourseId varchar(20) not null, foreign key(ClassId)references class(ClassId), foreign key(CourseId)references course(CourseId) ); create table homework ( HomeworkId varchar(20) primary key, TeacherId varchar(20) not null, Title varchar(80) not null, Content varchar(10000) not null, HomeworkCreateTime varchar(20) not null, HomeworkDeadLine varchar(20) not null, foreign key(TeacherId)references teacher(TeacherId) ); create table Handlehomework ( HandleHomeworkId varchar(20) primary key, HomeworkId varchar(20), StudentId varchar(20) not null, Title varchar(80) not null, Content varchar(10000) not null, HandleHomeworkCreateTime varchar(20) not null, foreign key(StudentId)references student(StudentId), foreign key(HomeworkId)references homework(HomeworkId) ); create table administrators ( AdminId varchar(20) primary key, AdminName varchar(20) not null, AdminPassword varchar(20) not null, AdminCreateTime varchar(20) not null ); insert into student values('s1','张1','123','cla1',now()); insert into student values('s2','张2','123','cla2',now()); insert into student values('s3','张3','123','cla3',now()); insert into student values('s4','赵1','123','cla1',now()); insert into student values('s5','赵2','123','cla2',now()); insert into student values('s6','赵3','123','cla3',now()); insert into student values('s7','钱1','123','cla1',now()); insert into student values('s8','钱2','123','cla2',now()); insert into student values('s9','钱3','123','cla3',now()); insert into class values('cla1','班1',now()); insert into class values('cla2','班2',now()); insert into class values('cla3','班3',now()); insert into teacher values('t1','赵老师','321',now()); insert into teacher values('t2','钱老师','321',now()); insert into teacher values('t3','孙老师','321',now()); insert into teacher values('t4','李老师','321',now()); insert into course values('cou1','课1','t1',now()); insert into course values('cou2','课2','t2',now()); insert into course values('cou3','课3','t3',now()); insert into course values('cou4','课4','t4',now()); insert into course_class values(1,'cla1','cou1'); insert into course_class values(2,'cla2','cou2'); insert into course_class values(3,'cla3','cou3'); insert into course_class values(4,'cla1','cou4'); insert into course_class values(5,'cla2','cou1'); insert into course_class values(6,'cla3','cou2'); insert into course_class values(7,'cla1','cou3'); insert into course_class values(8,'cla2','cou4'); insert into homework values('hw1','t1','作业1','作业内容1',now(),'10'); insert into homework values('hw2','t2','作业2','作业内容2',now(),'10'); insert into homework values('hw3','t3','作业3','作业内容3',now(),'10'); insert into homework values('hw4','t4','作业4','作业内容4',now(),'10'); insert into homework values('hw5','t1','作业5','作业内容5',now(),'10'); insert into homework values('hw6','t2','作业6','作业内容6',now(),'10'); insert into homework values('hw7','t3','作业7','作业内容7',now(),'10'); insert into homework values('hw8','t4','作业8','作业内容8',now(),'10'); insert into handlehomework values('hhw1','hw1','s1','学生作业标题test','学生作业内容test',now()); insert into administrators values('admin1','admin','admin',now());