java jsp 学生信息管理系统
这段时间回顾了下jsp的知识，简单写了个学生管理系统，大概功能有：
1、学生管理、用户管理、学院管理、个人信息
2、权限划分上，实现了不同角色不同权限：普通用户、学生只有浏览权限，管理员可以增删改查
文章目录
- java jsp 学生信息管理系统
- 实现过程
- 系统运行
- 写在最后
实现过程
整体代码使用了简单的分层，实体类层（以及dao层）、service逻辑层、controller控制层。
一共有三个实体类：用户类、学生类、学院类
public class User {
private static final long serialVersionUID = 1L;
private String id;
private String username; // 用户名
private String password; // 密码
private String pic; // 头像
private String role; // 角色
private String type; //类型
public User() {
super();
}
public User(String id){
this.id = id;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
}public class Student {
private static final long serialVersionUID = 1L;
private String id;
private String name; // 姓名
private Integer age; // 年龄
private String sex; // 性别
private String address; // 家庭住址
private String tel; // 家庭电话
private String phone; // 手机号码
private String code; // 身份证号码
private String content; // content
private String classId; // 班级编号
private String pic;
private String cname;
private String collegeId; //学院编号
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic;
}
public Student() {
super();
}
public Student(String id){
this.id = id;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getClassId() {
return classId;
}
public void setClassId(String classId) {
this.classId = classId;
}
public String getCollegeId() {
return collegeId;
}
public void setCollegeId(String collegeId) {
this.collegeId = collegeId;
}
}public class College {
private static final long serialVersionUID = 1L;
private String id;
private String name; // 学院名称
private String locate; // 建筑位置
public College() {
super();
}
public College(String id){
this.id = id;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLocate() {
return locate;
}
public void setLocate(String locate) {
this.locate = locate;
}
}dao层：分别用来操作user、student、college的数据表
public class StudentDao {
/**
* 添加
* @param con
* @param student
* @return
* @throws Exception
*/
public int add(Connection con,Student student)throws Exception{
student.setId(UUID.randomUUID().toString().replace("-", ""));
String sql="insert into db_student values(?,?,?,?,?,?,?,?,?,?,?)";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1,student.getId());
pstmt.setString(2,student.getName());
pstmt.setInt(3,student.getAge());
pstmt.setString(4,student.getSex());
pstmt.setString(5,student.getAddress());
pstmt.setString(6,student.getTel());
pstmt.setString(7,student.getPhone());
pstmt.setString(8,student.getCode());
pstmt.setString(9,student.getContent());
pstmt.setString(10,student.getPic());
// pstmt.setString(11,student.getClassId());
pstmt.setString(11,student.getCollegeId());
return pstmt.executeUpdate();
}
/**
* 删除
* @param con
* @param id
* @return
* @throws Exception
*/
public int delete(Connection con,String id)throws Exception{
String sql="delete from db_student where id=?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, id);
return pstmt.executeUpdate();
}
/**
* 更新
* @param con
* @param user
* @return
* @throws Exception
*/
public int update(Connection con,Student student)throws Exception{
String sql="update db_student set name=?,age=?,sex=?,address=?,tel=?,phone=?,code=?,content=?,pic=?,college_id=? where id = ?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(11,student.getId());
pstmt.setString(1,student.getName());
pstmt.setInt(2,student.getAge());
pstmt.setString(3,student.getSex());
pstmt.setString(4,student.getAddress());
pstmt.setString(5,student.getTel());
pstmt.setString(6,student.getPhone());
pstmt.setString(7,student.getCode());
pstmt.setString(8,student.getContent());
pstmt.setString(9,student.getPic());
// pstmt.setString(10,student.getClassId());
pstmt.setString(10,student.getCollegeId());
return pstmt.executeUpdate();
}
/**
* 查询所有
* @param con
* @param student
* @return
* @throws Exception
*/
public List<Student> list(Connection con,Student student,Page<Student> page)throws Exception{
List<Student> list = new ArrayList<>();
Student entity=null;
StringBuffer sqlBuffer = new StringBuffer();
sqlBuffer.append("select a.*,b.name as cname from db_student a left join db_college b on b.id = a.college_id where 1=1");
//拼接分页条件
String name = student.getName();
if(name != null && name !=""){
sqlBuffer.append(" and a.name = '"+name+"'");
}
String collegeId = student.getCollegeId();
if(collegeId != null && collegeId !=""){
sqlBuffer.append(" and a.class_id = '"+collegeId+"'");
}
//拼装分页参数
sqlBuffer.append(" limit "+((page.getPageNo()-1)*page.getPageSize())+","+page.getPageSize());
String sql=sqlBuffer.toString();
PreparedStatement pstmt=con.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
while(rs.next()){
entity = new Student();
entity.setId(rs.getString("id"));
entity.setName(rs.getString("name"));
entity.setAge(rs.getInt("age"));
entity.setSex(rs.getString("sex"));
entity.setAddress(rs.getString("address"));
entity.setTel(rs.getString("tel"));
entity.setPhone(rs.getString("phone"));
entity.setCode(rs.getString("code"));
entity.setContent(rs.getString("content"));
entity.setPic(rs.getString("pic"));
// entity.setClassId(rs.getString("class_id"));
entity.setClassId(rs.getString("college_id"));
entity.setCname(rs.getString("cname"));
list.add(entity);
}
return list;
}
/**
* id查询
* @param con
* @param id
* @return
* @throws Exception
*/
public Student getById(Connection con,String id)throws Exception{
Student student=null;
String sql="select * from db_student where id = ?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, id);
ResultSet rs=pstmt.executeQuery();
if(rs.next()){
student=new Student();
student.setId(rs.getString("id"));
student.setName(rs.getString("name"));
student.setAge(rs.getInt("age"));
student.setSex(rs.getString("sex"));
student.setAddress(rs.getString("address"));
student.setTel(rs.getString("tel"));
student.setPhone(rs.getString("phone"));
student.setCode(rs.getString("code"));
student.setContent(rs.getString("content"));
student.setPic(rs.getString("pic"));
// student.setClassId(rs.getString("class_id"));
student.setClassId(rs.getString("college_id"));
}
return student;
}
//获取总数 分页使用
public int count(Connection con,Student student)throws Exception{
int count = 0;
StringBuffer sqlBuffer = new StringBuffer();
sqlBuffer.append("select count(*) as count from db_student where 1=1");
//拼接分页条件
String name = student.getName();
if(name != null && name !=""){
sqlBuffer.append(" and name = '"+name+"'");
}
String collegeId = student.getCollegeId();
if(collegeId != null && collegeId !=""){
sqlBuffer.append(" and college_id = '"+collegeId+"'");
}
String sql=sqlBuffer.toString();
PreparedStatement pstmt=con.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
while(rs.next()){
count = rs.getInt("count");
}
return count;
}
}public class CollegeDao {
/**
* 添加
* @param con
* @param college
* @return
* @throws Exception
*/
public int add(Connection con,College college)throws Exception{
college.setId(UUID.randomUUID().toString().replace("-", ""));
String sql="insert into db_college values(?,?,?)";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1,college.getId());
pstmt.setString(2,college.getName());
pstmt.setString(3,college.getLocate());
return pstmt.executeUpdate();
}
/**
* 删除
* @param con
* @param id
* @return
* @throws Exception
*/
public int delete(Connection con,String id)throws Exception{
String sql="delete from db_college where id=?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, id);
return pstmt.executeUpdate();
}
/**
* 更新
* @param con
* @param user
* @return
* @throws Exception
*/
public int update(Connection con,College college)throws Exception{
String sql="update db_college set name=?,locate=? where id = ?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(3,college.getId());
pstmt.setString(1,college.getName());
pstmt.setString(2,college.getLocate());
return pstmt.executeUpdate();
}
/**
* 查询所有
* @param con
* @param grade
* @return
* @throws Exception
*/
public List<College> list(Connection con,College college,Page<College> page)throws Exception{
List<College> list = new ArrayList<>();
College entity=null;
StringBuffer sqlBuffer = new StringBuffer();
sqlBuffer.append("select * from db_college where 1=1");
//拼接分页条件
String name = college.getName();
if(name != null && name !=""){
sqlBuffer.append(" and name = '"+name+"'");
}
String locate = college.getLocate();
if(locate != null && locate !=""){
sqlBuffer.append(" and locate = '"+locate+"'");
}
//拼装分页参数
sqlBuffer.append(" limit "+((page.getPageNo()-1)*page.getPageSize())+","+page.getPageSize());
String sql=sqlBuffer.toString();
PreparedStatement pstmt=con.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
while(rs.next()){
entity = new College();
entity.setId(rs.getString("id"));
entity.setName(rs.getString("name"));
entity.setLocate(rs.getString("locate"));
list.add(entity);
}
return list;
}
/**
* id查询
* @param con
* @param id
* @return
* @throws Exception
*/
public College getById(Connection con,String id)throws Exception{
College college=null;
String sql="select * from db_college where id = ?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, id);
ResultSet rs=pstmt.executeQuery();
if(rs.next()){
college=new College();
college.setId(rs.getString("id"));
college.setName(rs.getString("name"));
college.setLocate(rs.getString("locate"));
}
return college;
}
//获取总数 分页使用
public int count(Connection con,College college)throws Exception{
int count = 0;
StringBuffer sqlBuffer = new StringBuffer();
sqlBuffer.append("select count(*) as count from db_college where 1=1");
//拼接分页条件
String name = college.getName();
if(name != null && name !=""){
sqlBuffer.append(" and name = '"+name+"'");
}
String locate = college.getLocate();
if(locate != null && locate !=""){
sqlBuffer.append(" and locate = '"+locate+"'");
}
String sql=sqlBuffer.toString();
PreparedStatement pstmt=con.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
while(rs.next()){
count = rs.getInt("count");
}
return count;
}
}public class UserDao {
/**
* 添加
* @param con
* @param user
* @return
* @throws Exception
*/
public int add(Connection con,User user)throws Exception{
user.setId(UUID.randomUUID().toString().replace("-", ""));
String sql="insert into db_user values(?,?,?,?,?,?)";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1,user.getId());
pstmt.setString(2,user.getUsername());
pstmt.setString(3,user.getPassword());
pstmt.setString(4,user.getPic());
pstmt.setString(5,user.getRole());
pstmt.setString(6,user.getType());
return pstmt.executeUpdate();
}
/**
* 删除
* @param con
* @param id
* @return
* @throws Exception
*/
public int delete(Connection con,String id)throws Exception{
String sql="delete from db_user where id=?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, id);
return pstmt.executeUpdate();
}
/**
* 更新
* @param con
* @param user
* @return
* @throws Exception
*/
public int update(Connection con,User user)throws Exception{
String sql="update db_user set username=?,password=?,pic=?,role=? where id = ?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(5,user.getId());
pstmt.setString(1,user.getUsername());
pstmt.setString(2,user.getPassword());
pstmt.setString(3,user.getPic());
pstmt.setString(4,user.getRole());
return pstmt.executeUpdate();
}
/**
* 查询所有
* @param con
* @param user
* @return
* @throws Exception
*/
public List<User> list(Connection con,User user,Page<User> page)throws Exception{
List<User> list = new ArrayList<>();
User entity=null;
StringBuffer sqlBuffer = new StringBuffer();
sqlBuffer.append("select * from db_user where 1=1");
//拼接分页条件
String username = user.getUsername();
if(username != null && username !=""){
sqlBuffer.append(" and username = '"+username+"'");
}
//拼装分页参数
sqlBuffer.append(" limit "+((page.getPageNo()-1)*page.getPageSize())+","+page.getPageSize());
String sql=sqlBuffer.toString();
PreparedStatement pstmt=con.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
while(rs.next()){
entity = new User();
entity.setId(rs.getString("id"));
entity.setUsername(rs.getString("username"));
entity.setPassword(rs.getString("password"));
entity.setPic(rs.getString("pic"));
entity.setRole(rs.getString("role"));
list.add(entity);
}
return list;
}
/**
* id查询
* @param con
* @param id
* @return
* @throws Exception
*/
public User getById(Connection con,String id)throws Exception{
User user=null;
String sql="select * from db_user where id = ?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, id);
ResultSet rs=pstmt.executeQuery();
if(rs.next()){
user=new User();
user.setId(rs.getString("id"));
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
user.setPic(rs.getString("pic"));
user.setRole(rs.getString("role"));
}
return user;
}
//获取总数 分页使用
public int count(Connection con,User user)throws Exception{
int count = 0;
StringBuffer sqlBuffer = new StringBuffer();
sqlBuffer.append("select count(*) as count from db_user where 1=1");
//拼接分页条件
String username = user.getUsername();
if(username != null && username !=""){
sqlBuffer.append(" and username = '"+username+"'");
}
String sql=sqlBuffer.toString();
PreparedStatement pstmt=con.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
while(rs.next()){
count = rs.getInt("count");
}
return count;
}
}public class LoginDao {
/**
* 用户登录
* @param con
* @param id
* @return
* @throws Exception
*/
public User login(Connection con,String username,String password, String type)throws Exception{
User user=null;
String sql="select * from db_user where username = ? and password=? and type=?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, username);
pstmt.setString(2, password);
pstmt.setString(3, type);
ResultSet rs=pstmt.executeQuery();
if(rs.next()){
user = new User();
user.setId(rs.getString("id"));
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
user.setPic(rs.getString("pic"));
user.setRole(rs.getString("role"));
user.setType(rs.getString("type"));
}
return user;
}
public User checkUsername(Connection con,String username)throws Exception{
User user=null;
String sql="select * from db_user where username = ?";
PreparedStatement pstmt=con.prepareStatement(sql);
pstmt.setString(1, username);
ResultSet rs=pstmt.executeQuery();
if(rs.next()){
user = new User();
user.setId(rs.getString("id"));
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
user.setPic(rs.getString("pic"));
user.setRole(rs.getString("role"));
}
return user;
}
}service层（处理逻辑）：
/**
* 学院DAO接口
*
*/
public class CollegeServiceImpl implements CollegeService {
CollegeDao collegeDao = new CollegeDao();
@Override
public int add(College college) {
try {
Connection con = DbUtil.getCon();
Integer result =collegeDao.add(con, college);
DbUtil.closeCon(con);
return result;
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
@Override
public int delete(String id) {
try {
Connection con = DbUtil.getCon();
int delete = collegeDao.delete(con, id);
DbUtil.closeCon(con);
return delete;
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
@Override
public int update(College college) {
try {
Connection con = DbUtil.getCon();
int update = collegeDao.update(con, college);
DbUtil.closeCon(con);
return update;
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
@Override
public Page<College> page(College college, Page<College> page) {
try {
Connection con = DbUtil.getCon();
int count = collegeDao.count(con,college);
page.setCount(count);
page.setPrev(page.getPageNo()-1);
page.setNext(page.getPageNo() + 1);// 下一页
page.setLast((count - 1) / page.getPageSize() + 1);// 总也数
List<College> list = collegeDao.list(con, college, page);
page.setList(list);
DbUtil.closeCon(con);
return page;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
public College getById(String id) {
try {
Connection con = DbUtil.getCon();
College college = collegeDao.getById(con, id);
DbUtil.closeCon(con);
return college;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}这一层就贴这一个吧，其他的与这个逻辑相同，可以参照着写
controller控制层，也只贴下CollegeController.java:
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import com.student.info.bean.College;
import com.student.info.dao.CollegeDao;
import com.student.info.service.CollegeService;
import com.student.info.service.impl.CollegeServiceImpl;
import com.student.utils.Page;
@WebServlet("/college")
public class CollegeController extends HttpServlet {
private static final long serialVersionUID = 1L;
CollegeDao collegeDao=new CollegeDao();
CollegeService collegeService = new CollegeServiceImpl();
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String method = request.getParameter("method");
if ("add".equals(method)) {
add(request,response);
}else if ("delete".equals(method)) {
delete(request, response);
}else if ("list".equals(method)) {
list(request, response);
}else if ("update".equals(method)) {
update(request, response);
}else if ("form".equals(method)) {
form(request, response);
}else if ("save".equals(method)) {
save(request, response);
}
}
//添加
private void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String contextPath = request.getServletContext().getContextPath();
String name = request.getParameter("name");
String locate = request.getParameter("locate");
College college = new College();
college.setName(name);
college.setLocate(locate);
collegeService.add(college);
response.sendRedirect(contextPath+"/college?method=list");
}
//添加保存
protected void save(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String contextPath = request.getServletContext().getContextPath();
College college = new College();
//得到上传文件的保存目录，将上传的文件存放于WEB-INF目录下，不允许外界直接访问，保证上传文件的安全
String savePath = this.getServletContext().getRealPath("/upload");
File file = new File(savePath);
//判断上传文件的保存目录是否存在
if (!file.exists() && !file.isDirectory()) {
System.out.println(savePath+"目录不存在，需要创建");
//创建目录
file.mkdir();
}
//消息提示
String msg = "";
try{
//使用Apache文件上传组件处理文件上传步骤：
//1、创建一个DiskFileItemFactory工厂
DiskFileItemFactory factory = new DiskFileItemFactory();
//2、创建一个文件上传解析器
ServletFileUpload upload = new ServletFileUpload(factory);
//解决上传文件名的中文乱码
upload.setHeaderEncoding("UTF-8");
//3、判断提交上来的数据是否是上传表单的数据
if(!ServletFileUpload.isMultipartContent(request)){
//按照传统方式获取数据
return;
}
//4、使用ServletFileUpload解析器解析上传数据，解析结果返回的是一个List<FileItem>集合，每一个FileItem对应一个Form表单的输入项
List<FileItem> list = upload.parseRequest(request);
for(FileItem item : list){
//如果fileitem中封装的是普通输入项的数据
if(item.isFormField()){
String name = item.getFieldName();
//解决普通输入项的数据的中文乱码问题
if ("id".endsWith(name)) {
if (item.getString("UTF-8")!=null && item.getString("UTF-8")!="") {
college.setId(item.getString("UTF-8"));
}
}
if ("name".endsWith(name)) {
college.setName(item.getString("UTF-8"));
}
if ("locate".endsWith(name)) {
college.setLocate(item.getString("UTF-8"));
}
}else{//如果fileitem中封装的是上传文件
//得到上传的文件名称，
String filename = item.getName();
System.out.println(filename);
if(filename==null || filename.trim().equals("")){
continue;
}
//注意：不同的浏览器提交的文件名是不一样的，有些浏览器提交上来的文件名是带有路径的，如： c:\a\b\1.txt，而有些只是单纯的文件名，如：1.txt
//处理获取到的上传文件的文件名的路径部分，只保留文件名部分
filename = filename.substring(filename.lastIndexOf("\\")+1);
//获取item中的上传文件的输入流
InputStream in = item.getInputStream();
//创建一个文件输出流
FileOutputStream out = new FileOutputStream(savePath + "\\" + filename);
//创建一个缓冲区
byte buffer[] = new byte[1024];
//判断输入流中的数据是否已经读完的标识
int len = 0;
//循环将输入流读入到缓冲区当中，(len=in.read(buffer))>0就表示in里面还有数据
while((len=in.read(buffer))>0){
//使用FileOutputStream输出流将缓冲区的数据写入到指定的目录(savePath + "\\" + filename)当中
out.write(buffer, 0, len);
}
//关闭输入流
in.close();
//关闭输出流
out.close();
//删除处理文件上传时生成的临时文件
item.delete();
msg = "文件上传成功！";
}
}
if (college.getId()!=null && !"".equals(college.getId())) {
collegeService.update(college);
}else{
collegeService.add(college);
}
response.sendRedirect(contextPath+"/college?method=list");
}catch (Exception e) {
msg= "文件上传失败！";
e.printStackTrace();
request.setAttribute("msg",msg);
request.getRequestDispatcher("/views/info/collegeForm.jsp").forward(request, response);
}
}
//删除
private void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String contextPath = request.getServletContext().getContextPath();
String id = request.getParameter("id");
collegeService.delete(id);
response.sendRedirect(contextPath+"/college?method=list");
}
//修改
private void update(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id = request.getParameter("id");
String name = request.getParameter("name");
String locate = request.getParameter("locate");
College college = new College();
college.setId(id);
college.setName(name);
college.setLocate(locate);
collegeService.update(college);
request.setAttribute("college", college);
request.getRequestDispatcher("/views/info/collegeForm.jsp").forward(request, response);
}
//列表查询
private void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.err.println("---开始查询---");
College college = new College();
//分页有关
Page<College> page = new Page<College>();
//设置查询页
String pageNoStr = request.getParameter("pageNo");
if (pageNoStr != null && pageNoStr != "") {
page.setPageNo(Integer.parseInt(pageNoStr));
}
//设置查询条件
String name = request.getParameter("name");
if (name != null && name != "") {
college.setName(name);
request.setAttribute("name", name);
}
String locate = request.getParameter("locate");
if (locate != null && locate != "") {
college.setLocate(locate);
request.setAttribute("locate", locate);
}
page = collegeService.page(college, page);
request.setAttribute("page", page);
request.getRequestDispatcher("/views/info/collegeList.jsp").forward(request, response);
}
//form跳转页面
private void form(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id = request.getParameter("id");
College college = new College();
if (id!=null && id!="") {
college = collegeService.getById(id);
}
request.setAttribute("college", college);
request.getRequestDispatcher("/views/info/collegeForm.jsp").forward(request, response);
}
}对了，缺少sql，我把sql也贴出来（里面包含了初始化的一些数据）：
/*
Navicat MySQL Data Transfer
Source Server : localhost_3306
Source Server Version : 50723
Source Host : localhost:3306
Source Database : webstudent1
Target Server Type : MYSQL
Target Server Version : 50723
File Encoding : 65001
Date: 2020-07-09 21:29:12
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for db_class
-- ----------------------------
DROP TABLE IF EXISTS `db_class`;
CREATE TABLE `db_class` (
`id` varchar(64) NOT NULL COMMENT '编号',
`name` varchar(64) DEFAULT NULL COMMENT '班级名称',
`content` text COMMENT '班级介绍',
`teacher` varchar(64) DEFAULT NULL COMMENT '班主任',
`tel` varchar(64) DEFAULT NULL COMMENT '班主任电话',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of db_class
-- ----------------------------
INSERT INTO `db_class` VALUES ('0f4821bf4a7d4b76b6a8cc7be00531db', '一年级', '一年级', '李老师', '17823212222');
INSERT INTO `db_class` VALUES ('7064fe6a918a44b892bc5e1946b10238', '三年级', '三年级', '牛老师', '17823212222');
INSERT INTO `db_class` VALUES ('8ff3cda9ba9841dd87433d23015b8b5f', '二年级', '呵呵呵', '得老师', '17823212222');
INSERT INTO `db_class` VALUES ('9a51b9230886403fa6f2aa674fbaf9ed', '计算机一班', '测试', '小李老师', '15878784520');
-- ----------------------------
-- Table structure for db_college
-- ----------------------------
DROP TABLE IF EXISTS `db_college`;
CREATE TABLE `db_college` (
`id` varchar(64) NOT NULL COMMENT '编号',
`name` varchar(64) DEFAULT NULL COMMENT '班级名称',
`locate` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of db_college
-- ----------------------------
INSERT INTO `db_college` VALUES ('1', '计算机学院', '11号楼');
INSERT INTO `db_college` VALUES ('2', '材料学院', '2号楼');
INSERT INTO `db_college` VALUES ('c64c91db35ac4a84a4e9e2b1d279e4ec', '理学院', '7号楼');
INSERT INTO `db_college` VALUES ('d1548e5235c547358c862fa8b15775de', '文学院', '4号楼');
-- ----------------------------
-- Table structure for db_student
-- ----------------------------
DROP TABLE IF EXISTS `db_student`;
CREATE TABLE `db_student` (
`id` varchar(64) NOT NULL COMMENT '编号',
`name` varchar(64) DEFAULT NULL COMMENT '姓名',
`age` int(11) DEFAULT NULL COMMENT '年龄',
`sex` varchar(64) DEFAULT NULL COMMENT '性别',
`address` varchar(255) DEFAULT NULL COMMENT '家庭住址',
`tel` varchar(64) DEFAULT NULL COMMENT '家庭电话',
`phone` varchar(64) DEFAULT NULL COMMENT '手机号码',
`code` varchar(64) DEFAULT NULL COMMENT '身份证号码',
`content` text COMMENT 'content',
`pic` varchar(255) DEFAULT NULL COMMENT '头像',
`college_id` varchar(64) DEFAULT NULL COMMENT '学院编号',
PRIMARY KEY (`id`),
KEY `class_id` (`college_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of db_student
-- ----------------------------
INSERT INTO `db_student` VALUES ('6ab3b6028e2244ae8b732337cf5cbd2c', '小李2', '23', '男', '北京', '1845362721', '1234@163.com', '2039', 'af', null, '2');
INSERT INTO `db_student` VALUES ('9d6f05fdb9a3420fb64b551bc45494a0', '小王', '24', '男', '北京', '1845362721', '1234@163.com', '5698', 'af', null, 'd1548e5235c547358c862fa8b15775de');
INSERT INTO `db_student` VALUES ('accb0844809b4e85a1513008354ab4c1', '小李', '23', '男', '北京', '1845362721', '1234@163.com', '看电影', '124235', null, '1');
INSERT INTO `db_student` VALUES ('dfeeba837d61404e96c3f112997007d0', '章子', '23', '男', '北京', '1845362721', '1234@163.com', '7465', 'afsa', null, 'd1548e5235c547358c862fa8b15775de');
-- ----------------------------
-- Table structure for db_user
-- ----------------------------
DROP TABLE IF EXISTS `db_user`;
CREATE TABLE `db_user` (
`id` varchar(64) NOT NULL COMMENT 'ID',
`username` varchar(64) DEFAULT NULL COMMENT '用户名',
`password` varchar(255) DEFAULT NULL COMMENT '密码',
`pic` varchar(255) DEFAULT NULL COMMENT '头像',
`role` varchar(100) DEFAULT NULL COMMENT '角色',
`type` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of db_user
-- ----------------------------
INSERT INTO `db_user` VALUES ('0c4910f52539481ea56e7696adb6aa80', '用户2', '123456', null, '123456', '2');
INSERT INTO `db_user` VALUES ('153df7fb21044639b2d2006fa9bb8871', '小王1', '123456', null, '123456', '0');
INSERT INTO `db_user` VALUES ('1694c6b8a1dd4ad0a7d0c7f5173c8c4e', 'test10', '123456', null, 'test1', '0');
INSERT INTO `db_user` VALUES ('39e02cffc9be4fc7b60076dd33efd252', 'root', '123456', null, '李斯2', '0');
INSERT INTO `db_user` VALUES ('63b0cc5f83194860bde04a9d87cefb52', '李四', '123456', null, '李四', '0');
INSERT INTO `db_user` VALUES ('8637d34e157f4244bc087f0d0a66ebb2', 'admin', '123456', null, '管理员', '1');
INSERT INTO `db_user` VALUES ('8db63a33d3964e69869852099e33b023', '用户3', '123456', null, '用户3', '2');
INSERT INTO `db_user` VALUES ('a3585c69a8da4973a54ecbed06f0f0a6', 'test12', '123456', null, '学生12', '0');
INSERT INTO `db_user` VALUES ('bcc69747173a4725ac5452ba1482eb7b', 'zhangsan', '123456', null, '123456', '0');
INSERT INTO `db_user` VALUES ('c996844be05c4ca88a6f8c552efd7f97', '小何', '123456', null, '123456', '0');
INSERT INTO `db_user` VALUES ('e5e72dd0bfd648eaa61119b7877862b3', 'zs1', '123456', null, '123456', '0');
SET FOREIGN_KEY_CHECKS=1;系统运行
1、登录页面：分为用户、学生、管理员三种用户登录
2、管理员登录页面：
可以进行用户、学生、学院的增删改查（其他两个模块的页面布局一样）3、学生和用户登录：
只能浏览，不能进行其他操作4、如果是学生和管理员登录都可以修改个人信息：
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