使用Jersey + SpringMVC 上传图片到图片服务器

心已赠人 2022-06-18 05:29 283阅读 0赞

> 实际项目中可能要用到单独的文件服务器， 这时候可以使用jersey上传文件的方法达到分离文件服务器和主服务器。于是通过查询资料以及不断尝试，终于走出了这个图片上传一直报错的困扰，现在将代码贴上，希望对后来者有帮助：

### 欣赏结果 ###

![这里写图片描述][SouthEast]

![这里写图片描述][SouthEast 1]

![这里写图片描述][SouthEast 2]

![这里写图片描述][SouthEast 3]

### 具体操作 ###

#### 创建图片服务器 ####

1）修改tomcat配置， 允许文件写操作，修改conf目录下的web.xml， 添加readonly参数为false。

<servlet>  
            <servlet-name>default</servlet-name>  
            <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>  
            <init-param>  
                <param-name>debug</param-name>  
                <param-value>0</param-value>  
            </init-param>  
            <init-param>  
                <param-name>readonly</param-name>  
                <param-value>false</param-value>  
            </init-param>  
            <init-param>  
                <param-name>listings</param-name>  
                <param-value>true</param-value>  
            </init-param>  
            <load-on-startup>1</load-on-startup> 
    </servlet>

2）创建一个web项目,如image-web，新建文件夹upload（用于存储位置），并打成war包，放入我们图片服务器Tomcat中webapps下 。

#### 编写上传服务器 ####

1）新建项目

2）导入相关架包

<dependency>  
          <groupId>com.sun.jersey</groupId>  
          <artifactId>jersey-core</artifactId>  
          <version>1.19</version>  
        </dependency>  
        <dependency>  
          <groupId>com.sun.jersey</groupId>  
          <artifactId>jersey-client</artifactId>  
          <version>1.19</version>  
    </dependency>  
    
    
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
        <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-tx</artifactId>
             <version>4.1.7.RELEASE</version>
            </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
    
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
    
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
    
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
    
    
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>

3）配置相关文件

web.xml

<context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/applicationContext.xml</param-value>
        </context-param>
        
        <filter>
            <filter-name>encodingFilter</filter-name>
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
            <init-param>
                <param-name>encoding</param-name>
                <param-value>UTF-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>encodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
        
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
    
        
        <servlet>
            <servlet-name>springMVC</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:spring/spring-mvc.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
            
    
        </servlet>
    
        <servlet-mapping>
            <servlet-name>springMVC</servlet-name>
            <url-pattern>*.do</url-pattern>
        </servlet-mapping>
        <servlet-mapping>
            <servlet-name>springMVC</servlet-name>
            <url-pattern>*.html</url-pattern>
        </servlet-mapping>

spring-mvc.xml

4）编写相关代码

UploadController.java

/** * 图片上传 * @param request * @return */
        @RequestMapping(value = "/upload", method = RequestMethod.POST)  
        public String upload(HttpServletRequest request) {  
            MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;  
            Iterator<String> iter = req.getFileNames();  
            Map<String, Object> map = new HashMap<String,Object>() ;
            Gson gson = new Gson() ;
            if (iter.hasNext()){  
                String fileName = iter.next();  
                MultipartFile file = req.getFile(fileName);  
                fileName = file.getOriginalFilename(); 
                String suffix = fileName.substring(fileName.lastIndexOf(".")) ;
                // 图片名称生成策略
                DateFormat df = new SimpleDateFormat("yyyyMMddHHmmssSSS");
                String format = df.format(new Date()) ;
                // 三位随机数
                Random r = new Random() ;
                for(int i=0; i<3; i++) {
                    format +=r.nextInt(10) ;
                }
                Client client = Client.create();  
                String URL = "http://localhost:8800/image-web/upload/" ;
                if (".png".equalsIgnoreCase(suffix) || ".jpg".equalsIgnoreCase(suffix) || ".gif".equalsIgnoreCase(suffix)) {
                    WebResource resource = client.resource(URL + format + suffix);
                    try {
                        resource.put(String.class, file.getBytes());
                        map.put("status", 200) ;
                        map.put("url", URL+format + suffix) ;
                        map.put("message", "上传成功！") ;
                    } catch (IOException e) {
                        e.printStackTrace() ;
                        map.put("status", 500) ;
                        map.put("url", "") ;
                        map.put("message", "上传失败！") ;
                    }
                } else {
                map.put("status", 500) ;
                map.put("url", "") ;
                map.put("message", "上传失败！ 图片格式不正确！") ;
                }
            }
            return gson.toJson(map) ;
        }

index.jsp

<div class="container-fluid">
      <div class="row">
        <div class="col-md-2"> </div>
        <div class="col-md-8" style="height:300px">
        <div class="bs-callout bs-callout-info">
        <h3 align="center"><b>使用Jersey+SpringMVC 实现上传图片到图片服务器</b></h3>
        <h4 align="right">-----------  bootstrap fileinput.js上传图片实例</h4>
        </div>
        
        <form action="<c:url value="/upload.html"/> " method="post" enctype="multipart/form-data">  
            <input type="file" id ="projectfile" class="projectfile" name="file" multiple class="file-loading"/>  
            <p class="help-block">支持jpg、png、gif格式</p>
        </form>
        </div>
        <div class="col-md-2"> </div>
      </div>
    </div>

> 使用Jersey + SpringMVC 上传图片到图片服务器到此结束。本篇为wenteryan原创，转载请注明出处：[http://blog.csdn.net/wenteryan][http_blog.csdn.net_wenteryan]

[SouthEast]: /images/20220618/fe7f0d24193a476e8049c088d4dd5bc1.png
[SouthEast 1]: /images/20220618/b53b3cb645814c54b4801c6afeebc8f3.png
[SouthEast 2]: /images/20220618/f3263780dd334c9d95dead7e2c99e177.png
[SouthEast 3]: /images/20220618/dfd4efa3acb948a7841db0a1c4eae383.png
[http_blog.csdn.net_wenteryan]: http://blog.csdn.net/wenteryan