Spring多文件上传multipart配置

Dear 丶 2022-05-27 06:07 444阅读 0赞

*  SpringMVC多文件上传multipart配置
    
     *  首先是项目引入依赖jar包
     *  配置Spring支持multipart文件上传
     *  Controller处理映射
        
         *  前台上传文件
         *  最后我们可以来看一下multipart请求与普通请求的区别

# SpringMVC多文件上传:multipart配置 #

## 1.首先是项目引入依赖jar包: ##

这里用到的是commons包。个人认为用起来比较好用的。  
**pom.xml**

<dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>1.3.1</version>
            </dependency>
            <dependency>
                <groupId>commons-io</groupId>
                <artifactId>commons-io</artifactId>
                <version>2.4</version>
            </dependency>
            <dependency>
                <groupId>commons-codec</groupId>
                <artifactId>commons-codec</artifactId>
                <version>1.11</version>
            </dependency>

## 2.配置Spring支持multipart文件上传: ##

spring的xml经典配置文件:  
配置 **multipartResolver**

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            
            <property name="defaultEncoding" value="utf-8" />
            
            <property name="maxUploadSize" value="10485760000" />
            
            <property name="maxInMemorySize" value="40960" />
        </bean>

## 3.Controller处理映射 ##

Controller处理映射中 比较关键的部分。

@RequestMapping(consumes = "multipart/form-data",value = "/awards-create", method = RequestMethod.POST)
        public ModelAndView awardsCreate(HttpServletRequest request,ModelAndView mav,
                @RequestParam("pictureFile1") MultipartFile pictureFile1) throws IOException {  
            String rootPath = System.getProperty("catalina.home") + "/webapps_data";
    
            if(!(new File(rootPath).exists())) {
                // ~/tomcat/webapps_data/ 如果目录不存在，则创建之
                new File(rootPath).mkdir();
            }
    
            //获取类型。如.png .jpg
            String file1Type = pictureFile1.getOriginalFilename().substring(
                    pictureFile1.getOriginalFilename().lastIndexOf("."));
    
            String file1Path = rootPath + "/" + thesis.getId() + file1Type;
    
            //利用MultipartFile提供的方法，直接保存到文件，详见源码
            pictureFile1.transferTo(new File(file1Path));

至此，我们已经配置OK，然后前台的写法:

### 4.前台上传文件: ###

### 最后，我们可以来看一下multipart请求与普通请求的区别: ###

**Request Header**

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
    Accept-Encoding:gzip, deflate, br
    Accept-Language:zh-CN,zh;q=0.9
    Cache-Control:max-age=0
    Connection:keep-alive
    Content-Length:66719
    Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryqavwlFLAAWz5R40N
    Cookie:JSESSIONID=DC9979A274570B2891E7179FFE89EB9B
    Host:localhost:8080
    Origin:http://localhost:8080
    Referer:http://localhost:8080/****/user/awards-create
    Upgrade-Insecure-Requests:1
    User-Agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36

**Request Payload**

------WebKitFormBoundaryqavwlFLAAWz5R40N
    Content-Disposition: form-data; name="name"
    
    123213
    ------WebKitFormBoundaryqavwlFLAAWz5R40N
    Content-Disposition: form-data; name="publishDate"
    
    2018-04-06
    ------WebKitFormBoundaryqavwlFLAAWz5R40N
    Content-Disposition: form-data; name="publishRange"
    
    国内外公开发行
    ------WebKitFormBoundaryqavwlFLAAWz5R40N
    Content-Disposition: form-data; name="picture01"; filename="2018-04-09 16-45-03 的屏幕截图.png"
    Content-Type: image/png
    
    
    ------WebKitFormBoundaryqavwlFLAAWz5R40N
    Content-Disposition: form-data; name="picture02"; filename="2018-04-09 16-32-30 的屏幕截图.png"
    Content-Type: image/png
    
    
    ------WebKitFormBoundaryqavwlFLAAWz5R40N--

@RequestMapping(consumes = "multipart/form-data",value = "/awards-create", method = RequestMethod.POST)
        public ModelAndView awardsCreate(HttpServletRequest request,ModelAndView mav,
                @RequestParam("pictureFile1") MultipartFile pictureFile1) throws IOException {  
    
            ......
    
            System.out.println("|||||||=====================" + pictureFile1.getContentType());
            System.out.println("|||||||=====================" + pictureFile1.getName());
            System.out.println("|||||||=====================" + pictureFile1.getOriginalFilename());
    
            int l = pictureFile1.getOriginalFilename().length();
            System.out.println("|||||||=====================" + l);
    
            int i = pictureFile1.getOriginalFilename().lastIndexOf(".");
            System.out.println("|||||||=====================" + i);
            System.out.println("|||||||=====================" +
                    pictureFile1.getOriginalFilename().charAt(l-1));
            System.out.println("|||||||=====================" +
                    pictureFile1.getOriginalFilename().substring(i-1));

|||||||=====================image/png
    |||||||=====================pictureFile1
    |||||||=====================2018-04-14 09-54-19 的屏幕截图.png
    |||||||=====================29
    |||||||=====================25
    |||||||=====================g
    2018-04-14 10:08:30 -45738 [http-bio-8080-exec-63] DEBUG   - Multipart file 'pictureFile1' with original filename [2018-04-14 09-54-19 的屏幕截图.png], stored at [/home/gaoyisheng/devel/tomcat/apache-tomcat-7.0.82/work/Catalina/localhost/trans/upload_bae19b7b_9b04_48b6_aad4_51f530a4ae39_00000043.tmp]: moved to [/home/gaoyisheng/devel/tomcat/tomcat/webapps_data/306_1.png]

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

参考资料:

<< Spring in action >> 4th edition