计算机java项目推荐 nodejs面向图书共享系统

旧城等待， 2024-02-17 11:59 30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

编辑

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 ##

面向图书共享系统利用网络沟通、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，有了网络，面向图书共享系统的各方面的管理更加科学和系统，更加规范和简便。

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

## 二、系统功能 ##

本面向图书共享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。

（1）管理员模块：首页、个人中心、图书分类管理、图书信息管理、用户管理、用户分享管理、联系我们、社区交流、系统管理。

（2）用户：首页、个人中心、图书信息管理、用户分享管理、我的收藏管理。

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

##  ##

## 三、系统项目截图 ##

#### 3.1前台首页 ####

![2ea0c6c77a0e4cc880d38799d2bf523f.png][]

![4ee524b0f84e4ce0a814017f17bff84d.png][]  
![9eff9ed812e34bd1b286c436b239a27f.png][]

![4369fc2ceed44a08b55677dc7facf6e6.png][]  
![da43c73f804345b2945af36bf0a2c014.png][]

![b56cd6fa4d38416b90a37bd6f1eb5ff0.png][]

![b71d4459e7f740ad83abc444b0603685.png][]

![7b8d1ecd7ed2430ba2f245c7e0e149ba.png][]  
![7d279bdc98c4425a833fbc45c43f8133.png][]

#### 3.2后台管理 ####

管理员可以在后台登录以后查看或者修改信息

#### ![ec8cd955f7004707b3292a789bdbce35.png][] ####

在修改页面中我们可以修改自己的密码

![b04d6ad95df149f396a088779f80f1cc.png][]

在用户页面我们可以查看用户的一些基本信息并且修改删除等

![29f22ca6ecd64d43a45c256059561824.png][]

在图书分类这边我们可以添加新的图书类别

![53fc9479b274432eaf3ca8bbfe8f76c5.png][]

在联系我们这边我们可以查看用户联系我们的一些基本信息可以进行回复删除等

![f75a3451fde3408ea0476c13beb3a644.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: ##

[https://gitee.com/sinonfin/L-javaWebSha/tree/master][https_gitee.com_sinonfin_L-javaWebSha_tree_master]

[2ea0c6c77a0e4cc880d38799d2bf523f.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/faf3b265237346ab9554e38ef612117c.png
[4ee524b0f84e4ce0a814017f17bff84d.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/fcf485bd63ab4500bb668ba5113d2601.png
[9eff9ed812e34bd1b286c436b239a27f.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/d3d4195c34864008b894ff3e9e6991b4.png
[4369fc2ceed44a08b55677dc7facf6e6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/e9dfe54485f7490eb688ce00e4ddb8e3.png
[da43c73f804345b2945af36bf0a2c014.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/b813aa5ed938409fa1da141b1d7d706d.png
[b56cd6fa4d38416b90a37bd6f1eb5ff0.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/60989778d3f0412084d0c28f5a7ce8cc.png
[b71d4459e7f740ad83abc444b0603685.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/c79f26dba5304aa982a51a66cf48d14c.png
[7b8d1ecd7ed2430ba2f245c7e0e149ba.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/63e157abd77c4bc486de391ea6dfc974.png
[7d279bdc98c4425a833fbc45c43f8133.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/3a56d88a36a64cf89923fd06eacc3517.png
[ec8cd955f7004707b3292a789bdbce35.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/3336aaf97ba74bfdb029d61652914e3e.png
[b04d6ad95df149f396a088779f80f1cc.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/37427422bff84cf6aab04304ed2c8ad6.png
[29f22ca6ecd64d43a45c256059561824.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/e976784794b249dba616b11626256a3b.png
[53fc9479b274432eaf3ca8bbfe8f76c5.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/3c2ad3e1401f4802b0aa9e0c8c46762a.png
[f75a3451fde3408ea0476c13beb3a644.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/503ae5d1ed3541f9a3150de4cfd4354a.png
[https_gitee.com_sinonfin_L-javaWebSha_tree_master]: https://gitee.com/sinonfin/L-javaWebSha/tree/master