javaweb毕设项目 - nodejs的疫情大数据展示与政策查询系统

雨点打透心脏的1/2处 2024-02-21 11:34 38阅读 0赞

> 开发语言：nodejs  
> 框架：Express  
> 数据库：MySQL5.7
> 
> 数据库工具：Navicat 11  
> 开发软件：Hbuilder / VS code  
> 浏览器：edge / 谷歌

--------------------

**目录**

一、项目简介

二、系统功能

三、系统项目截图

3.1前台首页

3.2后台管理

四、核心代码

4.1登录相关

4.2文件上传

4.3封装

--------------------

## 一、项目简介 ##

疫情大数据展示与政策查询系统利用网络沟通、计算机信息存储管理，有着与传统的方式所无法替代的优点。比如计算检索速度特别快、可靠性特别高、存储容量特别大、保密性特别好、可保存时间特别长、成本特别低等。在工作效率上，能够得到极大地提高，延伸至服务水平也会有好的收获。

--------------------

## 二、系统功能 ##

本疫情大数据展示与政策查询系统主要包括两大功能模块，即用户功能模块和管理员功能模块、用户模块。

（1）管理员模块：系统中的核心用户是管理员，管理员登录后，通过管理员来管理后台系统。主要功能有：首页、个人中心、用户管理、求助信息管理、捐赠信息管理、疫情信息管理、系统管理。

（2）用户：首页、个人中心、求助信息管理、捐赠信息管理、疫情信息管理。

--------------------

## 三、系统项目截图 ##

#### 3.1前台首页 ####

![69c3a004be2c49fdb4578c44d72c08d1.png][]

![3255f9b5082d477e9d949bc15b83e80a.png][]

![cf21a303982c41e08ca2e3aeea54fd03.png][]

![c2552f74779a4231a447146b2fc6fd72.png][]  
![0704397708574c6e8be41dff066c4568.png][]

![8ca19ed652464128892867056f1bb293.png][]

#### 3.2后台管理 ####

![77759469c33243ad9a97e8c752b9a528.png][]![510cf08ce9fc430a8728566b405da29b.png][]![72f8f1bee9044e5c91ff4228de58c288.png][]

![9c8e1a67284b49e9a2e1fb2e26372bf2.png][]![112166bd4dc0471cb2a4f4b4cefe06aa.png][]![482df90520374fb1b60c088b4e75c99a.png][]

--------------------

## 四、核心代码 ##

#### 4.1登录相关 ####

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.MD5Util;
        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().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){
        
        //    	ValidatorUtils.validateEntity(user);
            	if(userService.selectOne(new EntityWrapper().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().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 params,UserEntity user){
        
                EntityWrapper ew = new EntityWrapper();
            	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 ew = new EntityWrapper();
              	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){
        
        //    	ValidatorUtils.validateEntity(user);
            	if(userService.selectOne(new EntityWrapper().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){
        
        //        ValidatorUtils.validateEntity(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();
            }
        }

#### 4.2文件上传 ####

package com.controller;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.util.Arrays;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    import java.util.Random;
    import java.util.UUID;
    
    import org.apache.commons.io.FileUtils;
    import org.apache.commons.lang3.StringUtils;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.http.HttpHeaders;
    import org.springframework.http.HttpStatus;
    import org.springframework.http.MediaType;
    import org.springframework.http.ResponseEntity;
    import org.springframework.util.ResourceUtils;
    import org.springframework.web.bind.annotation.PathVariable;
    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.RestController;
    import org.springframework.web.multipart.MultipartFile;
    
    import com.annotation.IgnoreAuth;
    import com.baomidou.mybatisplus.mapper.EntityWrapper;
    import com.entity.ConfigEntity;
    import com.entity.EIException;
    import com.service.ConfigService;
    import com.utils.R;
    
    /**
     * 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);
    		FileUtils.copyFile(dest, new File("C:\\Users\\Desktop\\jiadian\\springbootl7own\\src\\main\\resources\\static\\upload"+"/"+fileName));
    		if(StringUtils.isNotBlank(type) && type.equals("1")) {
        
    			ConfigEntity configEntity = configService.selectOne(new EntityWrapper().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 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()){
        
    				/*if(!fileService.canRead(file, SessionManager.getSessionUser())){
    					getResponse().sendError(403);
    				}*/
    				HttpHeaders headers = new HttpHeaders();
    			    headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);    
    			    headers.setContentDispositionFormData("attachment", fileName);    
    			    return new ResponseEntity(FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED);
    			}
    		} catch (IOException e) {
        
    			e.printStackTrace();
    		}
    		return new ResponseEntity(HttpStatus.INTERNAL_SERVER_ERROR);
    	}
    	
    }

#### 4.3封装 ####

package com.utils;
    
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     * 返回数据
     */
    public class R extends HashMap {
        
    	private static final long serialVersionUID = 1L;
    	
    	public R() {
        
    		put("code", 0);
    	}
    	
    	public static R error() {
        
    		return error(500, "未知异常，请联系管理员");
    	}
    	
    	public static R error(String msg) {
        
    		return error(500, msg);
    	}
    	
    	public static R error(int code, String msg) {
        
    		R r = new R();
    		r.put("code", code);
    		r.put("msg", msg);
    		return r;
    	}
    
    	public static R ok(String msg) {
        
    		R r = new R();
    		r.put("msg", msg);
    		return r;
    	}
    	
    	public static R ok(Map map) {
        
    		R r = new R();
    		r.putAll(map);
    		return r;
    	}
    	
    	public static R ok() {
        
    		return new R();
    	}
    
    	public R put(String key, Object value) {
        
    		super.put(key, value);
    		return this;
    	}
    }

## 项目获取: ##

[69c3a004be2c49fdb4578c44d72c08d1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/8f8f9ab15d3f459e97d0019165c129c3.png
[3255f9b5082d477e9d949bc15b83e80a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/30a6e6cfe52a40bb8548fc591cafb513.png
[cf21a303982c41e08ca2e3aeea54fd03.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/99cb65b5a9f14aa99fc9ba16dca69b84.png
[c2552f74779a4231a447146b2fc6fd72.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/fedbe5211ce94710af4f5703201914a0.png
[0704397708574c6e8be41dff066c4568.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/07f1f471b3c244aaafe447f7c4dc6834.png
[8ca19ed652464128892867056f1bb293.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/f340f0a2829b40a1921d711e24d471c9.png
[77759469c33243ad9a97e8c752b9a528.png]: https://img-blog.csdnimg.cn/77759469c33243ad9a97e8c752b9a528.png
[510cf08ce9fc430a8728566b405da29b.png]: https://img-blog.csdnimg.cn/510cf08ce9fc430a8728566b405da29b.png
[72f8f1bee9044e5c91ff4228de58c288.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/28588d2c84a14a4eb9c0a37989abe276.png
[9c8e1a67284b49e9a2e1fb2e26372bf2.png]: https://img-blog.csdnimg.cn/9c8e1a67284b49e9a2e1fb2e26372bf2.png
[112166bd4dc0471cb2a4f4b4cefe06aa.png]: https://img-blog.csdnimg.cn/112166bd4dc0471cb2a4f4b4cefe06aa.png
[482df90520374fb1b60c088b4e75c99a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/e55cff418ea5456c8ab3d6a09f1790e2.png