基于java（ssm）学生在线课程学习系统
学生在线课程学习系统是基于java编程语言，mysql数据库，ssm框架，和idea工具开发，本项目主要分为学生，管理员两个角色，学生的功能是登陆，注册，查看公告，查看课程，播放课程视频，下载课程资料，在线交流，在线答疑，在线考试等功能；管理员可以对学生信息，课程信息，考试信息，课程信息，用户交流信息等进行管理。本系统功能齐全，文档齐全，适合作为java毕业设计参考和学习。
一.技术环境
jdk版本：1.8 及以上
ide工具：IDEA
数据库: mysql5.7 （必须5.7）
编程语言: Java
tomcat: 8.0 及以上
java框架：SSM
maven: 3.6.1
前端：layui，vue
详细技术：HTML+CSS+JS+JSP+JAVA+SSM+MYSQL+JQUERY+MAVEN+VUE
二.项目文件（项目获取请看文末官网）
三.系统功能
四.代码示例
package com.lmu.controller;
/*** 和登陆有关的都在这里*/import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.lmu.model.Role;
import com.lmu.model.User;
import com.lmu.service.RoleService;
import com.lmu.service.UserService;
import com.lmu.utils.JsonUtils;
import com.lmu.utils.UserUtils;import org.apache.commons.collections.map.HashedMap;
import org.apache.struts2.ServletActionContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;import java.io.IOException;
import java.util.HashMap;
import java.util.Map;@Controller("loginController")
@Scope("prototype")
public class LoginController extends ActionSupport {@Autowiredprivate UserService userService;@Autowiredprivate RoleService roleService;private User user;private Map<String, Object> map = new HashMap();public User getUser() {return user;}public void setUser(User user) {this.user = user;}public UserService getUserService() {return userService;}public void setUserService(UserService userService) {this.userService = userService;}/*** 用户登陆* @return*/public void index() throws IOException {User user1 = userService.getUser(user);if (user1 != null){if (user1.getIsSh() == 1){if (user1.getRole().getEnName().equals("admin")){ActionContext.getContext().getSession().put("user", user1);}if (user1.getRole().getEnName().equals("js")){ActionContext.getContext().getSession().put("user1", user1);}if (user1.getRole().getEnName().equals("xs")){ActionContext.getContext().getSession().put("user2", user1);}map.put("flag", 1);map.put("url", "login_indexs.do");map.put("id", user1.getId());JsonUtils.toJson(map);} else {map.put("flag", 2);JsonUtils.toJson(map);}} else {map.put("flag", 3);JsonUtils.toJson(map);}}public String indexs() throws IOException {User u = UserUtils.getUser();if (u != null){ActionContext.getContext().put("user", u);String ss = u.getRole().getEnName();ActionContext.getContext().put("role", u.getRole().getEnName());}return SUCCESS;}//登陆页面public String login() {return SUCCESS;}//退出public String tuichu() {ActionContext ac = ActionContext.getContext();Map session = ac.getSession();session.remove("userName");session.remove("userId");ServletActionContext.getRequest().getSession().invalidate();return "login";}}package com.lmu.controller;/*** 用户新增*/import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.lmu.model.Role;
import com.lmu.model.User;
import com.lmu.service.RoleService;
import com.lmu.service.UserService;
import com.lmu.utils.JsonUtils;
import com.lmu.utils.Pager;
import com.lmu.utils.UserUtils;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;import java.awt.event.FocusEvent;
import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;@Controller("userController")
@Scope("prototype")
public class UserController extends ActionSupport implements ModelDriven<User> {@Autowiredprivate UserService userService;@Autowiredprivate RoleService roleService;private User user;private Integer userId;private Map<String, Object> map = new HashMap();/*** list** @return*/public String list() throws IOException {User user1 = UserUtils.getUser();if (user1 == null || user1.getId() == null){ActionContext.getContext().put("login", 1);return SUCCESS;}Pager<User> pagers = null;Role role = user1.getRole();if (role.getEnName().equals("admin")) {pagers = userService.getList(user);ActionContext.getContext().put("pagers", pagers);ActionContext.getContext().put("user", user1);ActionContext.getContext().put("role", role);ActionContext.getContext().put("bean", user);return SUCCESS;} else if (role.getEnName().equals("xs") || role.getEnName().equals("js")) {pagers = userService.getList(user1);ActionContext.getContext().put("pagers", pagers);ActionContext.getContext().put("bean", user);return SUCCESS;}return null;}/*** 跳转add** @return*/public String add() {Pager<Role> pagers = roleService.pagers();ActionContext.getContext().put("pagers", pagers);return SUCCESS;}/*** 查询修改** @return*/public String edit() {User bean = userService.findById(userId);Pager<Role> pagers = roleService.pagers();ActionContext.getContext().put("bean", bean);ActionContext.getContext().put("pagers", pagers);return SUCCESS;}/*** 审核** @return*/public void updateSh() throws IOException {user.setIsSh(1);userService.updates(user);map.put("flag", true);map.put("url", "user_list.do");JsonUtils.toJson(map);}/*** 更新** @return*/public String update() throws IOException {if (user.getPass().equals("")){user.setPass(null);}userService.updates(user);map.put("flag", true);map.put("url", "user_list.do");JsonUtils.toJson(map);return SUCCESS;}/*** 保存** @return*/public void save() throws IOException {if (userService.getUser(user) != null){map.put("flag", false);map.put("url", "login_login.do");JsonUtils.toJson(map);} else {user.setTime(new Date());userService.save(user);map.put("flag", true);map.put("url", "login_login.do");JsonUtils.toJson(map);}}public void delete() throws IOException {User user1 = userService.findById(userId);user1.setIsDelete(1);userService.update(user1);map.put("flag", true);map.put("url", "user_list.do");JsonUtils.toJson(map);}@Overridepublic User getModel() {if (user == null) {user = new User();}return user;}public Integer getUserId() {return userId;}public void setUserId(Integer userId) {this.userId = userId;}public User getUser() {return user;}public void setUser(User user) {this.user = user;}
}
五.项目截图
