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MongoDB文件服务器搭建

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  • Post category:其他




一、环境准备

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.edward</groupId>
    <artifactId>myfileserver</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>myfileserver</name>
    <description>mongodbfileserver project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/de.flapdoodle.embed/de.flapdoodle.embed.mongo
        这个是采用内嵌MongoDB服务器需要的依赖
 -->
        <!--<dependency>-->
            <!--<groupId>de.flapdoodle.embed</groupId>-->
            <!--<artifactId>de.flapdoodle.embed.mongo</artifactId>-->
        <!--</dependency>-->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>



二、项目结构

本项目采用springboot构件的

在这里插入图片描述



三、配置

application.properties配置文件 


server.address=localhost
server.port=8081

# Thymeleaf
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.cache=false
spring.thymeleaf.mode=HTML5

# limit upload file size
spring.servlet.multipart.max-file-size=1024KB
spring.servlet.multipart.max-request-size=1024KB

# independent MongoDB server 如果采用内嵌MongoDB服务器把这个注释掉
spring.data.mongodb.uri=mongodb://localhost:27017/test

安全配置类 SecurityConfig.java文件 

/**
 1. Spring Security 配置类.
 */
@Configuration
@EnableWebMvc
public class SecurityConfig extends WebMvcConfigurerAdapter {
	@Override
	public void addCorsMappings(CorsRegistry registry) {
		registry.addMapping("/**").allowedOrigins("*") ; // 允许跨域请求
	}
}



三、后台编码

1.domain层 File.java 

/**
 1. File 文档类.
 */
@Document
public class File {
	@Id  // 主键
	private String id;
    private String name; // 文件名称
    private String contentType; // 文件类型
    private long size;
    private Date uploadDate;
    private String md5;
    private Binary content; // 文件内容
    private String path; // 文件路径
   //get set 方法
    protected File() {
    }
    
    public File(String name, String contentType, long size,Binary content) {
    	this.name = name;
    	this.contentType = contentType;
    	this.size = size;
    	this.uploadDate = new Date();
    	this.content = content;
    }
   
    @Override
    public boolean equals(Object object) {
        if (this == object) {
            return true;
        }
        if (object == null || getClass() != object.getClass()) {
            return false;
        }
        File fileInfo = (File) object;
        return java.util.Objects.equals(size, fileInfo.size)
                && java.util.Objects.equals(name, fileInfo.name)
                && java.util.Objects.equals(contentType, fileInfo.contentType)
                && java.util.Objects.equals(uploadDate, fileInfo.uploadDate)
                && java.util.Objects.equals(md5, fileInfo.md5)
                && java.util.Objects.equals(id, fileInfo.id);
    }

    @Override
    public int hashCode() {
        return java.util.Objects.hash(name, contentType, size, uploadDate, md5, id);
    }
}
  1. 存储库FileRepository.java 
/**
 * File 存储库.
 */
public interface FileRepository extends MongoRepository<File, String> {
}

3.服务接口及实现类

FileService.java 


/**
 * File 服务接口.
 */
public interface FileService {
	/**
	 * 保存文件
	 */
	File saveFile(File file);
	
	/**
	 * 删除文件
	 */
	void removeFile(String id);
	
	/**
	 * 根据id获取文件
	 */
	Optional<File> getFileById(String id);

	/**
	 * 分页查询，按上传时间降序
	 * @return
	 */
	List<File> listFilesByPage(int pageIndex, int pageSize);
}

FileServiceImpl.java 

/**
 * File 服务. 
 */
@Service
public class FileServiceImpl implements FileService {
	@Autowired
	public FileRepository fileRepository;
	@Override
	public File saveFile(File file) {
		return fileRepository.save(file);
	}
	@Override
	public void removeFile(String id) {
		fileRepository.deleteById(id);
	}
	@Override
	public Optional<File> getFileById(String id) {
		return fileRepository.findById(id);
	}

	@Override
	public List<File> listFilesByPage(int pageIndex, int pageSize) {
		Page<File> page = null;
		List<File> list = null;
		
		Sort sort = new Sort(Direction.DESC,"uploadDate"); 
		Pageable pageable = PageRequest.of(pageIndex, pageSize, sort);
		
		page = fileRepository.findAll(pageable);
		list = page.getContent();
		return list;
	}
}

4.控制层、API资源层

FileController.java 


@CrossOrigin(origins = "*", maxAge = 3600) // 允许所有域名访问
@Controller
public class FileController {

	@Autowired
	private FileService fileService;

	@Value("${server.address}")
	private String serverAddress;

	@Value("${server.port}")
	private String serverPort;

	@RequestMapping(value = "/")
	public String index(Model model) {
		// 展示最新二十条数据
		model.addAttribute("files", fileService.listFilesByPage(0, 20));
		return "index";
	}

	/**
	 * 分页查询文件
	 */
	@GetMapping("files/{pageIndex}/{pageSize}")
	@ResponseBody
	public List<File> listFilesByPage(@PathVariable int pageIndex, @PathVariable int pageSize) {
		return fileService.listFilesByPage(pageIndex, pageSize);
	}

	/**
	 * 获取文件片信息
	 */
	@GetMapping("files/{id}")
	@ResponseBody
	public ResponseEntity<Object> serveFile(@PathVariable String id) throws UnsupportedEncodingException {

		Optional<File> file = fileService.getFileById(id);

		if (file.isPresent()) {
			return ResponseEntity.ok()
					.header(HttpHeaders.CONTENT_DISPOSITION, "attachment; fileName=" + new String(file.get().getName().getBytes("utf-8"),"ISO-8859-1"))
					.header(HttpHeaders.CONTENT_TYPE, "application/octet-stream")
					.header(HttpHeaders.CONTENT_LENGTH, file.get().getSize() + "").header("Connection", "close")
					.body(file.get().getContent().getData());
		} else {
			return ResponseEntity.status(HttpStatus.NOT_FOUND).body("File was not fount");
		}

	}

	/**
	 * 在线显示文件
	 */
	@GetMapping("/view/{id}")
	@ResponseBody
	public ResponseEntity<Object> serveFileOnline(@PathVariable String id) {

		Optional<File> file = fileService.getFileById(id);

		if (file.isPresent()) {
			return ResponseEntity.ok()
					.header(HttpHeaders.CONTENT_DISPOSITION, "fileName=\"" + file.get().getName() + "\"")
					.header(HttpHeaders.CONTENT_TYPE, file.get().getContentType())
					.header(HttpHeaders.CONTENT_LENGTH, file.get().getSize() + "").header("Connection", "close")
					.body(file.get().getContent().getData());
		} else {
			return ResponseEntity.status(HttpStatus.NOT_FOUND).body("File was not fount");
		}

	}

	/**
	 * 上传
	 */
	@PostMapping("/")
	public String handleFileUpload(@RequestParam("file") MultipartFile file, RedirectAttributes redirectAttributes) {

		try {
			File f = new File(file.getOriginalFilename(), file.getContentType(), file.getSize(),
					new Binary(file.getBytes()));
			f.setMd5(MD5Util.getMD5(file.getInputStream()));
			fileService.saveFile(f);
			System.out.println(f);
		} catch (IOException | NoSuchAlgorithmException ex) {
			ex.printStackTrace();
			redirectAttributes.addFlashAttribute("message", "Your " + file.getOriginalFilename() + " is wrong!");
			return "redirect:/";
		}

		redirectAttributes.addFlashAttribute("message",
				"You successfully uploaded " + file.getOriginalFilename() + "!");

		return "redirect:/";
	}

	/**
	 * 上传接口
	 */
	@PostMapping("/upload")
	@ResponseBody
	public ResponseEntity<String> handleFileUpload(@RequestParam("file") MultipartFile file) {
		File returnFile = null;
		try {
			File f = new File(file.getOriginalFilename(), file.getContentType(), file.getSize(),
					new Binary(file.getBytes()));
			f.setMd5(MD5Util.getMD5(file.getInputStream()));
			returnFile = fileService.saveFile(f);
			String path = "//" + serverAddress + ":" + serverPort + "/view/" + returnFile.getId();
			return ResponseEntity.status(HttpStatus.OK).body(path);

		} catch (IOException | NoSuchAlgorithmException ex) {
			ex.printStackTrace();
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(ex.getMessage());
		}

	}

	/**
	 * 删除文件
	 */
	@DeleteMapping("/{id}")
	@ResponseBody
	public ResponseEntity<String> deleteFile(@PathVariable String id) {

		try {
			fileService.removeFile(id);
			return ResponseEntity.status(HttpStatus.OK).body("DELETE Success!");
		} catch (Exception e) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(e.getMessage());
		}
	}
}

5.工具类 MD5Util.java 


/**
 * MD5 工具类.
 */
public class MD5Util {

	/** 
     * 获取该输入流的MD5值 
     */  
    public static String getMD5(InputStream is) throws NoSuchAlgorithmException, IOException {  
        StringBuffer md5 = new StringBuffer();  
        MessageDigest md = MessageDigest.getInstance("MD5");  
        byte[] dataBytes = new byte[1024];  
          
        int nread = 0;   
        while ((nread = is.read(dataBytes)) != -1) {  
            md.update(dataBytes, 0, nread);  
        };  
        byte[] mdbytes = md.digest();  
          
        // convert the byte to hex format  
        for (int i = 0; i < mdbytes.length; i++) {  
            md5.append(Integer.toString((mdbytes[i] & 0xff) + 0x100, 16).substring(1));  
        }  
        return md5.toString();  
    }  

}



四、前台页面

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
</head>
<body>
<h1>File server</h1>
    <a href="/">首页</a>

<div th:if="${message}">
    <h2 th:text="${message}"/>
</div>

<div>
    <form method="POST" enctype="multipart/form-data" action="/">
        <table>
            <tr><td>File to upload:</td><td><input type="file" name="file" /></td></tr>
            <tr><td></td><td><input type="submit" value="Upload" /></td></tr>
        </table>
        
    </form>
</div>

<div>    
    <table border="1">
    <thead>
    <tr>

        <td>Name</td>
        <td>ID</td>
        <td>contentType</td>
        <td>size</td>
        <td>uploadDate</td>
        <td>md5</td>
    </tr>
    </thead>
    <tbody>
    <tr th:if="${files.size()} eq 0">
        <td colspan="3">没有文件信息！！</td>
    </tr>
    <tr th:each="file : ${files}">
        <td><a th:href="'files/'+${file.id}" th:text="${file.name}" /></td>
        <td th:text="${file.id}" ></td>
        <td th:text="${file.contentType}" ></td>
        <td th:text="${file.size}" ></td>
        <td th:text="${file.uploadDate}" ></td>
        <td th:text="${file.md5}" ></td>
    </tr>
    </tbody>
</table>
</div>
</body>
</html>


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