Java 实战项目之教材管理系统的实现流程
作者：qq_1334611189
读万卷书不如行万里路，只学书上的理论是远远不够的，只有在实战中才能获得能力的提升，本篇文章手把手带你用java+SSM+jsp+mysql+maven实现教材管理系统,大家可以在过程中查缺补漏，提升水平
一、项目简述
功能包括： 管理员可以增删改查教材、教材商、入库教材、用户(用 户包括学生和教师)可以对教材商、教材进行。Excel的导入 导出操作。教师以领取入库的教材，可以退还教材。学生只能在对应的教师那里领取教材，并且可以退还教材、 查询自己已经领取的教材。并且对已领教材付款等等。
二、项目运行
环境配置： Jdk1.8 + Tomcat8.5 + mysql + Eclispe (IntelliJ IDEA,Eclispe,MyEclispe,Sts 都支持)
项目技术： JSP +Spring + SpringMVC + MyBatis + html+ css + JavaScript + JQuery + Ajax + layui+ maven等等。
查看班级选报信息：
@Service
public class TopicsServiceImpl implements TopicsService {
@Autowired
private MyClassMapper classMapper;
@Autowired
private StudentMapper studentMapper;
@Autowired
private SubjectselectedMapper subjectselectedMapper;
@Autowired
private SubjectMapper subjectMapper;
@Autowired
private HttpServletRequest request;
/**
* 查看班级选报信息
*/
@Override
public List<classinfo> classinfo(Long id) {
MyClass className = classMapper.selectById(id);//查到班级名字
List<Student> students = studentMapper.selectByListAll(id);//根据student表里班级id查到用户所在班级的所有人
List<Subjectselected> projectselectedlist = new ArrayList<>();
List<Subject> projectlist = new ArrayList<>();
Subjectselected projectselected = null;
Subject project = null;
for (int i = 0; i < students.size(); i++) {
List<Subjectselected> tprojectselecteds = subjectselectedMapper.selectBystudentid(students.get(i).getId());
if (tprojectselecteds != null && tprojectselecteds.size() > 0)
projectselected = tprojectselecteds.get(0);
if (projectselected != null) {
projectselectedlist.add(projectselected);
} else {
projectselected = new Subjectselected();
projectselected.setId(0L);
projectselected.setIdProject(0L);
projectselected.setIdStudent(0L);
projectselected.setStuselectFlag(0L);
projectselectedlist.add(projectselected);
}
}
for (int i = 0; i < projectselectedlist.size(); i++) {
if (projectselectedlist.get(i).getId() != 0) {
projectlist.add(subjectMapper.selectById(projectselectedlist.get(i).getIdProject()));
} else {
project = new Subject();
project.setProjectname("无");
project.setTeachernames("无");
projectlist.add(project);
}
}
List<classinfo> infolist = new ArrayList<>();
classinfo info = null;
for (int i = 0; i < projectlist.size(); i++) {
info = new classinfo();
info.setId(students.get(i).getId());
info.setClassName(className.getClassName());
info.setName(students.get(i).getName());
info.setStuNum(students.get(i).getStunum());
info.setProjectName(projectlist.get(i).getProjectname());
info.setTeacherNames(projectlist.get(i).getTeachernames());
info.setStuSelectFlag(projectselectedlist.get(i).getStuselectFlag());
infolist.add(info);
}
return infolist;
}
/**
* 查看课题信息
* 通过classid
*/
@Override
public List<topicsinfo> topics(Long id) {
String specialty = classMapper.selectByspecialty(id);
List<Subject> projectlist = subjectMapper.selectByAll("%" + specialty + "%");
List<topicsinfo> topicsinfolist = new ArrayList<>();
topicsinfo info = null;
for (int i = 0; i < projectlist.size(); i++) {
info = new topicsinfo();
info.setProject_id(projectlist.get(i).getId());
info.setProjectType(subjectMapper.selectByprojectType(projectlist.get(i).getIdProjecttype().intValue()));
info.setProjectSource(subjectMapper.selectByprojectSource(projectlist.get(i).getIdProjectsource().intValue()));
info.setProjectName(projectlist.get(i).getProjectname());
info.setSelectFlag(projectlist.get(i).getSelectFlag());
info.setMarchSpecialty(projectlist.get(i).getMarchspecialty());
info.setTeacherNames(projectlist.get(i).getTeachernames());
topicsinfolist.add(info);
}
return topicsinfolist;
}
/**
* 课题具体信息
*/
@Override
public List<topicsto> topicsinfo(Long project_id) {
List<Subjectselected> listed = subjectselectedMapper.selectByprojectid(project_id);//中间表
request.getSession().setAttribute("listsize",listed.size());
List<topicsto> tolist = new ArrayList<>();
topicsto to = null;
Student student = null;
for (int i = 0; i < listed.size(); i++) {
to = new topicsto();
student = studentMapper.selectByid(listed.get(i).getIdStudent());
if(student == null)
continue;
to.setStuNum(student.getStunum());
to.setName(student.getName());
to.setStuSelectFlag(listed.get(i).getStuselectFlag());
to.setClassName(classMapper.selectById(student.getIdClass()).getClassName());
tolist.add(to);
}
return tolist;
}
/**
* 获取该用户是否选报了课题
*/
public Long state(Student student) {
Subjectselected project = null;
List<Subjectselected> tprojectselecteds = subjectselectedMapper.selectBystudentid(student.getId());
if (tprojectselecteds != null && tprojectselecteds.size() > 0)
project = tprojectselecteds.get(0);
if (project == null) {
return 0L;
} else
return project.getStuselectFlag();
}
/**
* 添加选题
*/
@Override
public void insertproject(String project, Long studentid) {
Long projectid = subjectMapper.selectByprojectid(project);
int flagid = subjectselectedMapper.insertenroll(projectid, studentid);
}
/**
* 删除选题
*/
@Override
public int deleteprojectselectedid(Long id) {
int flag = subjectselectedMapper.deleteBystudentId(id);
return flag;
}
/**
* 查询课题名
*
*/
public String selectprojectname(Long id){
String project_Name = subjectMapper.selectById(id).getProjectname();
return project_Name;
}
/**
* 获取该题是否可选
*/
@Override
public Long flag(Long project_id) {
return subjectMapper.selectByselectFlag(project_id);
}
}
班级信息查询业务：
@Service
public class ClassServiceImpl implements ClassService {
@Autowired
MyClassMapper myClassMapper;
@Autowired
SpecialtyService specialtyService;
@Autowired
StudentService studentService;
@Override
public List getClasses(Integer offset, String getName, Long specialtyid, Long id_institute) {
// 设置分页查询条件
MyClassExample myClassExample = new MyClassExample();
// 添加查询条件
myClassExample = addCondition(myClassExample,offset,id_institute,getName,specialtyid);
if(myClassExample==null)
return null;
//如果 offset 为 -1 则只查询 id 和 name 列
if(offset==-1)
{
return myClassMapper.selectByExampleSelective(myClassExample,
MyClass.Column.id,
MyClass.Column.className);
}else{
return myClassMapper.selectByExampleSelective(myClassExample);
}
}
@Override
public long getClassesCount(Integer offset, String getName, Long specialtyid, Long id_institute) {
// 设置分页查询条件
MyClassExample myClassExample = new MyClassExample();
// 添加查询条件
myClassExample = addCondition(myClassExample,offset,id_institute,getName,specialtyid);
if(myClassExample==null)
return 0;
return myClassMapper.countByExample(myClassExample);
}
@Override
public long delClass(MyClass myClass, Long id_institute) throws MyException {
checkSpecialtyId(myClass,id_institute);
return myClassMapper.deleteByPrimaryKey(myClass.getId());
}
@Override
public long putClass(MyClass myClass, Long id_institute) throws MyException {
checkSpecialtyId(myClass,id_institute);
return myClassMapper.updateByPrimaryKey(myClass);
}
@Override
public long postClass(MyClass myClass, Long id_institute) throws MyException {
checkSpecialtyId(myClass,id_institute);
long count = getClassesCount(1,myClass.getClassName(),null, id_institute);
if(count!=0)
throw new MyException("该班级已存在");
return myClassMapper.insert(myClass);
}
@Override
public long delClassBySpecialty(Long specialtyid) {
return myClassMapper.deleteByExample(new MyClassExample().createCriteria().andIdSpecialtyEqualTo(specialtyid).example());
}
public MyClassExample addCondition(MyClassExample myClassExample,Integer offset , Long id_institute , String keyWord , Long id_specialty){
//代表为超管，则可以查询所有；
if(id_institute==-1)
{
return myClassExample.newAndCreateCriteria()
.when(StringUtil.stringIsNotNull(keyWord), criteria -> criteria.andClassNameEqualTo(keyWord)) //根据关键字查询
.when(id_specialty!=null,criteria -> criteria.andIdSpecialtyEqualTo(id_specialty)) //根据指定教研室查询
.example()
.when(offset!=-1 && offset != 0,criteria -> criteria.page(offset-1, 10));
}
//查询出来当前学院的所有专业
List<Specialty> specialties = specialtyService.getSpecialtys(-1,null,null,id_institute);
//提取 id列 列表
List<Long> specialtiesIDs = specialties.stream().map(Specialty::getId).collect(Collectors.toList());
if(specialtiesIDs.size()==0||specialtiesIDs==null)
return null;
return myClassExample.newAndCreateCriteria()
.when(StringUtil.stringIsNotNull(keyWord),criteria -> criteria.andClassNameEqualTo(keyWord)) //根据关键字查询
.when(id_specialty!=null,criteria -> criteria.andIdSpecialtyEqualTo(id_specialty)) //根据指定教研室查询
// 查询的专业只能在当前的学院的教研室下
.andIdSpecialtyIn(specialtiesIDs)
.example()
.when(offset!=-1 && offset != 0,criteria -> criteria.page(offset-1, 10));// 查询第offest-1页数据（每页10条）
}
public void checkSpecialtyId(MyClass myClass ,Long id_institute) throws MyException {
//如果为超管则不需要检查有没有权力
if(id_institute==-1)
{
return ;
}
long id_specialty = myClass.getIdSpecialty();
List<Specialty> specialtyes = specialtyService.getSpecialtys(1,null,null,id_institute);
//如果被删除的专业是不属于本系教研室则提示没有权限
for(Specialty specialty :specialtyes)
{
if(specialty.getId()==id_specialty)
return;
}
throw new MyException("没有权限操作");
}
}
管理员业务操作：
@Service
public class AdminServiceImpl implements AdminService {
@Autowired
AdminMapper adminMapper;
@Autowired
SadminMapper sadminMapper;
@Autowired
GeneralPurposeMapper mapper;
@Autowired
PublicService publicService;
//Session 保存时间（秒）
private final Integer SAVE_TIME = 60*60*24;
//超管 和 子管用一个登录
@Autowired
StudentMapper studentMapper;
@Autowired
SubjectselectedMapper subjectselectedMapper;
@Autowired
SubjectMapper subjectMapper;
@Autowired
ProjectMapper projectMapper;
@Autowired
ClassMapper classMapper;
@Autowired
SpecialtyMapper specialtyMapper;
@Autowired
InstituteMapper instituteMapper;
@Autowired
HttpServletRequest request;
@Autowired
HttpServletResponse response;
@Override
public Msg login(String name, String pwd , HttpSession httpSession) {
Sadmin sadmin = selectSadminByName(name);
if(sadmin!=null){
//验证密码是否与数据库中的相同
if(sadmin.getPwd().equals(pwd)){
User user = new User();
//-1表示为超管
user.setId(-1L);
user.setRole("sadmin");
user.setUserName(sadmin.getName());
//生成Token 存到 Cookie
Cookie cookie = new Cookie("token",TokenUtil.createToken(
user
));
//该Cookie无法被js读取
cookie.setHttpOnly(true);
cookie.setPath("/");
response.addCookie(cookie);
return Msg.success();
}
return Msg.error("密码错误");
}else {
Admin admin = selectByName(name);
if(admin == null){
return Msg.error("账号不存在");
}else {
if(admin != null && admin.getPwd().equals(pwd)){
User user = new User();
user.setId(admin.getId());
user.setRole("admin");
user.setUserName(admin.getName());
Cookie cookie = new Cookie("token",TokenUtil.createToken(
user
));
cookie.setPath("/");
cookie.setHttpOnly(true);
response.addCookie(cookie);
return Msg.success();//账号密码正确
}
return Msg.error("密码错误");
}
}
}
@Override
public Admin selectByName(String name) {
//创建一个 Admin 实例 ，添加条件 为 Name == name
AdminExample adminExample = new AdminExample();
adminExample.createCriteria().andNameEqualTo(name);
//根据实例 来查询
List<Admin> admin = adminMapper.selectByExample(adminExample);
if( admin==null || admin.size()==0 ) {
return null;
}
return admin.get(0);
}
@Override
public Sadmin selectSadminByName(String name) {
SadminExample sadminExample = new SadminExample();
sadminExample.createCriteria().andNameEqualTo(name);
List<Sadmin> sadmin = sadminMapper.selectByExample(sadminExample);
if( sadmin==null|| sadmin.size()==0 )
return null;
return sadmin.get(0);
}
@Override
public int updatePwdByUserName(String name, String pwd) {
AdminExample adminExample = new AdminExample();
adminExample.createCriteria().andNameEqualTo(name);
Admin admin = new Admin();
admin.setPwd(pwd);
adminMapper.updateByExampleSelective(admin,adminExample);
return 0;
}
@Override
public int updateSadminPwdByUserName(String name, String pwd) {
SadminExample sadminExample = new SadminExample();
sadminExample.createCriteria().andNameEqualTo(name);
Sadmin sadmin = new Sadmin();
sadmin.setPwd(pwd);
return sadminMapper.updateByExampleSelective(sadmin, sadminExample);
}
// 班级的增加
@Override
public int add_class(Long specialty_id, String class_name) {
List<Class> classes = select_class(null, null, null, null, class_name);
if (classes == null || classes.size() == 0) {
Class class1 = new Class();
class1.setClassName(class_name);
class1.setIdSpecialty(specialty_id);
return classMapper.insert(class1);
}
return 0;
}
@Override
public int addAdmin(Admin admin) {
//添加的时候检测又没用户名重复的
publicService.CheckIfTheUsernameIsDuplicated(admin.getName());
return adminMapper.insert(admin);
}
@Override
public int delAdmin(Admin admin) {
return adminMapper.deleteByPrimaryKey(admin.getId());
}
@Override
public int updateAdmin(Admin admin) {
//不更新username
admin.setName(null);
return adminMapper.updateByPrimaryKeySelective(admin);
}
@Override
public List selectAdmins(Long offset) {
if(offset!=null && offset==-1){
return adminMapper.selectByExampleSelective(
new AdminExample(),
Admin.Column.id
);
}
return adminMapper.selectByExample(
new AdminExample()
);
}
// 学生的增删改查
@Override
public int add_student(String userName, String stuNum, Long id_class, String name, String gender, String pwd){
Student ss = studentMapper.select_studentbyName(userName, stuNum);
if (ss == null) {
StudentWithBLOBs student = new StudentWithBLOBs();
student.setUsername(userName);
student.setStunum(stuNum);
student.setIdClass(id_class);
student.setName(name);
student.setGender(gender);
student.setPwd(pwd);
return studentMapper.insert(student);
}
return 0;
}
public int delete_class(Long class_id) {
return classMapper.deleteByPrimaryKey(class_id);
}
@Override
public int update_class(Long class_id, Long specialty_id, String class_name) {
Class class1 = new Class();
class1.setId(class_id);
class1.setIdSpecialty(specialty_id);
class1.setClassName(class_name);
return classMapper.updateByPrimaryKeySelective(class1);
}
@Override
public List<Project> select_project(Long institute_id, Long section_id, String section_name) {
return projectMapper.select_project(institute_id, null, null);
}
@Override
public List<Static_student> select_studentXT_all(Long section_id, String section_name, Long specialty_id, String specialty_name, Long class_id, String class_name) {
List<Static_student> static_students = studentMapper.select_studentXT_all(section_id, section_name, specialty_id, specialty_name, class_id, class_name);
if (static_students != null && static_students.size() > 0) {
for (int i = 0; i < static_students.size(); i++) {
List<Subjectselected> projectselecteds = select_Projectselected(static_students.get(i).getId(), null);
if (projectselecteds != null && projectselecteds.size() > 0) {
static_students.get(i).setStuselectFlag("" + projectselecteds.get(0).getStuselectFlag());
static_students.get(i).setProjectname(projectselecteds.get(0).getProject_name());
static_students.get(i).setTeachernames(projectselecteds.get(0).getProject_teachers());
} else {
static_students.get(i).setProjectname("未选题");
static_students.get(i).setTeachernames("");
}
}
}
return static_students;
}
@Override
public List<Class> select_class(Long institute_id, Long section_id, Long specialty_id, Long class_id, String class_name) {
return classMapper.select_class(institute_id, section_id, specialty_id, class_id, class_name);
}
// 专业方向的增删改查
@Override
public int add_specialty(Long section_id, String specialty_name) {
List<Specialty> specialties = select_specialty(null, null, null, specialty_name);
if (specialties == null || specialties.size() == 0) {
Specialty specialty = new Specialty();
specialty.setIdSection(section_id);
specialty.setSpecialtyName(specialty_name);
return specialtyMapper.insert(specialty);
}
return 0;
}
@Override
public int delete_student(Long student_id) {
return studentMapper.deleteByPrimaryKey(student_id);
}
@Override
public int update_student(Long student_id, String userName, String stuNum, Long id_class, String name, String gender, String pwd) {
Student student = new Student();
student.setId(student_id);
student.setUsername(userName);
student.setStunum(stuNum);
student.setIdClass(id_class);
student.setName(name);
student.setGender(gender);
student.setPwd(pwd);
return studentMapper.updateByPrimaryKeySelective((StudentWithBLOBs) student);
}
@Override
public List<Static_student> select_student(Long institute_id, Long specialty_id, Long class_id, Long student_id, String name) {
List<Static_student> static_students = studentMapper.select_Student(institute_id, specialty_id, class_id, student_id, name);
if (static_students != null) {
for (int i = 0; i < static_students.size(); i++) {
Static_student static_student = static_students.get(i);
List<Subjectselected> projectselected = select_Projectselected(static_student.getId(), null);
if (projectselected != null && projectselected.size() != 0) {
String s = "";
if (projectselected.get(0).getStuselectFlag() == 1) s = "选题待审核";
else if (projectselected.get(0).getStuselectFlag() == 2) s = "选题未通过";
else s = "选题通过";
static_student.setStuselectFlag(s);
static_student.setProjectname(projectselected.get(0).getProject_name());
static_student.setTeachernames(projectselected.get(0).getProject_teachers());
}
}
return static_students;
}
return null;
}
// 通过学生id 或者 课题id 查 课题的选择 情况
public List<Subjectselected> select_Projectselected(Long student_id, Long project_id) {
return subjectselectedMapper.select_Projectselected(student_id, project_id);
}
public List<Subject> select_ProjectXQ(Long institute_id, Long section_id, String name) {
List<Subject> projects = subjectMapper.select_ProjectXQ(institute_id, section_id, name);
if (projects != null) {
for (int i = 0; i < projects.size(); i++) {
if (projects.get(i).getSelectFlag() == 0) projects.get(i).setProjectGB("可选");
else if (projects.get(i).getSelectFlag() == 1) projects.get(i).setProjectGB("不可选");
}
}
return projects;
}
public int delete_specialty(Long specialty_id) {
return specialtyMapper.deleteByPrimaryKey(specialty_id);
}
@Override
public int update_specialty(Long specialty_id, Long section_id, String specialty_name) {
Specialty specialty = new Specialty();
specialty.setId(specialty_id);
specialty.setIdSection(section_id);
specialty.setSpecialtyName(specialty_name);
return specialtyMapper.updateByPrimaryKeySelective(specialty);
}
@Override
public List<Specialty> select_specialty(Long institute_id, Long section_id, Long specialty_id, String specialty_name) {
return specialtyMapper.select_specialty(institute_id, section_id, specialty_id, specialty_name); // 根据学院id 或者 教研室id 查所有专业方向
}
@Override
public List<Institute> select_institute(Long institute_id, String institute_name) {
InstituteExample instituteExample = new InstituteExample();
InstituteExample.Criteria criteria = instituteExample.createCriteria();
if (institute_id != null && institute_id != 0) criteria.andIdEqualTo(institute_id);
if (institute_name != null && institute_name.length() > 0) criteria.andInstituteNameEqualTo(institute_name);
return instituteMapper.selectByExample(instituteExample);
}
}
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