管理员进入指定功能操作区之后可以管理教师。其页面见下图。教师的资料需要管理员负责管理，包括修改，新增，删除等操作。

学生管理

管理员进入指定功能操作区之后可以管理学生信息。其页面见下图。学生是本系统的一个角色，其相关信息需要管理员添加，修改，删除等。

专业信息管理

管理员进入指定功能操作区之后可以管理专业信息。其页面见下图。管理员在本页面修改专业名称，删除指定的专业信息，管理员提交专业名称可以查询专业信息。

五、核心代码

5.1、文件上传

/**
 * 上传文件映射表
 */
@RestController
@RequestMapping("file")
@SuppressWarnings({"unchecked","rawtypes"})
public class FileController{
	@Autowired
    private ConfigService configService;
	/**
	 * 上传文件
	 */
	@RequestMapping("/upload")
	public R upload(@RequestParam("file") MultipartFile file,String type) throws Exception {
		if (file.isEmpty()) {
			throw new EIException("上传文件不能为空");
		}
		String fileExt = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);
		File path = new File(ResourceUtils.getURL("classpath:static").getPath());
		if(!path.exists()) {
		    path = new File("");
		}
		File upload = new File(path.getAbsolutePath(),"/upload/");
		if(!upload.exists()) {
		    upload.mkdirs();
		}
		String fileName = new Date().getTime()+"."+fileExt;
		File dest = new File(upload.getAbsolutePath()+"/"+fileName);
		file.transferTo(dest);
		/**
  		 * 如果使用idea或者eclipse重启项目，发现之前上传的图片或者文件丢失，将下面一行代码注释打开
   		 * 请将以下的"D:\\springbootq33sd\\src\\main\\resources\\static\\upload"替换成你本地项目的upload路径，
 		 * 并且项目路径不能存在中文、空格等特殊字符
 		 */
//		FileUtils.copyFile(dest, new File("D:\\springbootq33sd\\src\\main\\resources\\static\\upload"+"/"+fileName)); /**修改了路径以后请将该行最前面的//注释去掉**/
		if(StringUtils.isNotBlank(type) && type.equals("1")) {
			ConfigEntity configEntity = configService.selectOne(new EntityWrapper<ConfigEntity>().eq("name", "faceFile"));
			if(configEntity==null) {
				configEntity = new ConfigEntity();
				configEntity.setName("faceFile");
				configEntity.setValue(fileName);
			} else {
				configEntity.setValue(fileName);
			}
			configService.insertOrUpdate(configEntity);
		}
		return R.ok().put("file", fileName);
	}
	
	/**
	 * 下载文件
	 */
	@IgnoreAuth
	@RequestMapping("/download")
	public ResponseEntity<byte[]> download(@RequestParam String fileName) {
		try {
			File path = new File(ResourceUtils.getURL("classpath:static").getPath());
			if(!path.exists()) {
			    path = new File("");
			}
			File upload = new File(path.getAbsolutePath(),"/upload/");
			if(!upload.exists()) {
			    upload.mkdirs();
			}
			File file = new File(upload.getAbsolutePath()+"/"+fileName);
			if(file.exists()){
				HttpHeaders headers = new HttpHeaders();
			    headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);    
			    headers.setContentDispositionFormData("attachment", fileName);    
			    return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return new ResponseEntity<byte[]>(HttpStatus.INTERNAL_SERVER_ERROR);
	}
	
}

5.2、数据库配置

server:
    tomcat:
        uri-encoding: UTF-8
    port: 8080
    servlet:
        context-path: /springbootr1tjf

spring:
    datasource:
        driverClassName: com.mysql.jdbc.Driver
        url: jdbc:mysql://127.0.0.1:3306/springbootr1tjf?useUnicode=true&characterEncoding=utf-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8
        username: root
        password: 123456

#        driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver
#        url: jdbc:sqlserver://127.0.0.1:1433;DatabaseName=springbootr1tjf
#        username: sa
#        password: 123456

    servlet:
      multipart:
        max-file-size: 10MB
        max-request-size: 10MB
    resources:
      static-locations: classpath:static/,file:static/

#mybatis
mybatis-plus:
  mapper-locations: classpath*:mapper/*.xml
  #实体扫描，多个package用逗号或者分号分隔
  typeAliasesPackage: com.entity
  global-config:
    #主键类型  0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID";
    id-type: 1
    #字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断"
    field-strategy: 2
    #驼峰下划线转换
    db-column-underline: true
    #刷新mapper 调试神器
    refresh-mapper: true
    #逻辑删除配置
    logic-delete-value: -1
    logic-not-delete-value: 0
    #自定义SQL注入器
    sql-injector: com.baomidou.mybatisplus.mapper.LogicSqlInjector
  configuration:
    map-underscore-to-camel-case: true
    cache-enabled: false
    call-setters-on-nulls: true
    #springboot 项目mybatis plus 设置 jdbcTypeForNull (oracle数据库需配置JdbcType.NULL, 默认是Other)
    jdbc-type-for-null: 'null' 

5.3、登录功能实现

 
package com.controller;
 
 
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.Map;
 
import javax.servlet.http.HttpServletRequest;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
 
import com.annotation.IgnoreAuth;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.entity.TokenEntity;
import com.entity.UserEntity;
import com.service.TokenService;
import com.service.UserService;
import com.utils.CommonUtil;
import com.utils.MPUtil;
import com.utils.PageUtils;
import com.utils.R;
import com.utils.ValidatorUtils;
 
/**
 * 登录相关
 */
@RequestMapping("users")
@RestController
public class UserController{
	
	@Autowired
	private UserService userService;
	
	@Autowired
	private TokenService tokenService;
 
	/**
	 * 登录
	 */
	@IgnoreAuth
	@PostMapping(value = "/login")
	public R login(String username, String password, String captcha, HttpServletRequest request) {
		UserEntity user = userService.selectOne(new EntityWrapper<UserEntity>().eq("username", username));
		if(user==null || !user.getPassword().equals(password)) {
			return R.error("账号或密码不正确");
		}
		String token = tokenService.generateToken(user.getId(),username, "users", user.getRole());
		return R.ok().put("token", token);
	}
	
	/**
	 * 注册
	 */
	@IgnoreAuth
	@PostMapping(value = "/register")
	public R register(@RequestBody UserEntity user){
    	if(userService.selectOne(new EntityWrapper<UserEntity>().eq("username", 
            user.getUsername())) !=null) {
    		return R.error("用户已存在");
    	}
        userService.insert(user);
        return R.ok();
    }
 
	/**
	 * 退出
	 */
	@GetMapping(value = "logout")
	public R logout(HttpServletRequest request) {
		request.getSession().invalidate();
		return R.ok("退出成功");
	}
	
	/**
     * 密码重置
     */
    @IgnoreAuth
	@RequestMapping(value = "/resetPass")
    public R resetPass(String username, HttpServletRequest request){
    	UserEntity user = userService.selectOne(new EntityWrapper<UserEntity> 
                          ().eq("username", username));
    	if(user==null) {
    		return R.error("账号不存在");
    	}
    	user.setPassword("123456");
        userService.update(user,null);
        return R.ok("密码已重置为：123456");
    }
	
	/**
     * 列表
     */
    @RequestMapping("/page")
    public R page(@RequestParam Map<String, Object> params,UserEntity user){
        EntityWrapper<UserEntity> ew = new EntityWrapper<UserEntity>();
    	PageUtils page = userService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.allLike(ew, user), params), params));
        return R.ok().put("data", page);
    }
 
	/**
     * 列表
     */
    @RequestMapping("/list")
    public R list( UserEntity user){
       	EntityWrapper<UserEntity> ew = new EntityWrapper<UserEntity>();
      	ew.allEq(MPUtil.allEQMapPre( user, "user")); 
        return R.ok().put("data", userService.selectListView(ew));
    }
 
    /**
     * 信息
     */
    @RequestMapping("/info/{id}")
    public R info(@PathVariable("id") String id){
        UserEntity user = userService.selectById(id);
        return R.ok().put("data", user);
    }
    
    /**
     * 获取用户的session用户信息
     */
    @RequestMapping("/session")
    public R getCurrUser(HttpServletRequest request){
    	Long id = (Long)request.getSession().getAttribute("userId");
        UserEntity user = userService.selectById(id);
        return R.ok().put("data", user);
    }
 
    /**
     * 保存
     */
    @PostMapping("/save")
    public R save(@RequestBody UserEntity user){
    	if(userService.selectOne(new EntityWrapper<UserEntity>().eq("username",                 
            user.getUsername())) !=null) {
    		return R.error("用户已存在");
    	}
        userService.insert(user);
        return R.ok();
    }
 
    /**
     * 修改
     */
    @RequestMapping("/update")
    public R update(@RequestBody UserEntity user){
        userService.updateById(user);//全部更新
        return R.ok();
    }
 
    /**
     * 删除
     */
    @RequestMapping("/delete")
    public R delete(@RequestBody Long[] ids){
        userService.deleteBatchIds(Arrays.asList(ids));
        return R.ok();
    }
}
 

5.4、业务层（Service）

package com.service;

import java.util.List;
import java.util.Map;

import org.apache.ibatis.annotations.Param;

import com.baomidou.mybatisplus.mapper.Wrapper;
import com.baomidou.mybatisplus.service.IService;
import com.entity.UserEntity;
import com.utils.PageUtils;


/**
 * 系统用户
 */
public interface UserService extends IService<UserEntity> {
 	PageUtils queryPage(Map<String, Object> params);
    
   	List<UserEntity> selectListView(Wrapper<UserEntity> wrapper);
   	
   	PageUtils queryPage(Map<String, Object> params,Wrapper<UserEntity> wrapper);
	   	
}

5.5、数据访问层（Dao）

package com.dao;

import java.util.List;

import org.apache.ibatis.annotations.Param;

import com.baomidou.mybatisplus.mapper.BaseMapper;
import com.baomidou.mybatisplus.mapper.Wrapper;
import com.baomidou.mybatisplus.plugins.pagination.Pagination;
import com.entity.UserEntity;

/**
 * 用户
 */
public interface UserDao extends BaseMapper<UserEntity> {
	
	List<UserEntity> selectListView(@Param("ew") Wrapper<UserEntity> wrapper);

	List<UserEntity> selectListView(Pagination page,@Param("ew") Wrapper<UserEntity> wrapper);
	
}