spring mvc上传文件服务器配置

在使用springMVC进行系统实现时，springMVC默认的解析器里面是没有加入对文件上传的解析的。但如果你想使用springMVC对文件上传的解析器来处理文件上传的时候就需要在spring的applicationContext里面加上springMVC提供的MultipartResolver的申明。客户端每次进行请求的时候，springMVC都会检查request里面是否包含多媒体信息，如果包含了就会使用MultipartResolver进行解析,springMVC会使用一个支持文件处理的MultipartHttpServletRequest来包裹当前的HttpServletRequest，然后使用MultipartHttpServletRequest就可以对文件进行处理了。Spring已经为我们提供了一个MultipartResolver的实现，我们只需要拿来用就可以了，那就是org.springframework.web.multipart.commons.CommsMultipartResolver。因为springMVC的MultipartResolver底层使用的是Commons-fileupload，所以还需要加入对Commons-fileupload.jar的支持。

首先，配置文件添加

<!--  这里申明的id必须为multipartResolver  -->  
<bean id="multipartResolver"  
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  

    <!-- one of the properties available; the maximum file size in bytes -->  
    <property name="maxUploadSize" value="100000"/>  
</bean>  

CommonsMultipartResolver允许设置的属性有：
defaultEncoding：表示用来解析request请求的默认编码格式，当没有指定的时候根据Servlet规范会使用默认值ISO-8859-1。
当 request自己指明了它的编码格式的时候就会忽略这里指定的 defaultEncoding。
uploadTempDir：设置上传文件时的临时目录，默认是Servlet容器的临时目录。
maxUploadSize：设置允许上传的最大文件大小，以字节为单位计算。当设为-1时表示无限制，默认是-1。
maxInMemorySize：设置在文件上传时允许写到内存中的最大值，以字节为单位计算，默认是10240。

然后在 Controller 层就可以接收到了。再转到imp去处理

@Controller  
public class  Controller {  

@RequestMapping(value = "/upload", method=RequestMethod.POST)  
public String handleFormUpload(@RequestParam("name") String name, @RequestParam("file") MultipartFile file) {  
//当要同时上传多个文件时，可以给定多个MultipartFile参数  

            if (!file.isEmpty()) {  

                //第一种获取文件存储
               String ss = "xxx/xxxx/xxx.png";
               byte[] bytes = file.getBytes();
               BufferedOutputStream stream = new BufferedOutputStream( new FileOutputStream(new File(ss)));
               stream.write(bytes);
               stream.flush();
               stream.close();


               //第二种获取文件存储
               String path = "xxx/xxxx/xxx/";
               String fileName = "aaa.png";
               File targetFile = new File( path , fileName);
               if(!targetFile.exists()){  
                    targetFile.mkdirs();  
                }     
               file.transferTo(targetFile);  

           } 
        }  
    }  

像平常不用框架的话，基本就是原生的 servlet上传了

这个用的是 jspsmartupload

@WebServlet(name="UploadImgServlet", urlPatterns={"/services/UploadImgServlet"})
public class UploadImgServlet extends HttpServlet {
//  @Autowired
//  private BizDao bizDao;

    @Override
    public void init() throws ServletException {
//        ServletContext servletContext = this .getServletContext();   
//        WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);           
//        bizDao = (BizDao)ctx.getBean("bizDao" );

    }


    public void doGet(HttpServletRequest request, HttpServletResponse resp)
            throws ServletException, IOException {
        doPost(request, resp);
    }


    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");

        resp.setContentType("text/html,charset=UTF-8");

        SmartUpload smartUpload = new SmartUpload();
        try {
            // 添加缓存
            smartUpload.initialize(this.getServletConfig(), req, resp);
            smartUpload.upload();

            com.jspsmart.upload.File smartFile = smartUpload.getFiles()
                    .getFile(0);

            if (!smartFile.isMissing()) {

                String path = getServletContext().getRealPath("");
                // address +  fileName
                String saveFileName = path.substring(0 , path.lastIndexOf("\\") + 1) + "upload" + "/" + smartFile.getFileName();

                System.out.println("===saveFileName==="+ saveFileName);

                // 保存图片
                smartFile.saveAs(saveFileName, smartUpload.SAVE_PHYSICAL);

                resp.getWriter().print("http://192.168.0.149:8081/upload/" +
                                                             smartFile.getFileName());


            } else {
                resp.getWriter().print("0");
            }
        } catch (Exception e) {
            resp.getWriter().print("0");
            e.printStackTrace();
            resp.getWriter().print(e);
        }

    }
}

原生的慢慢解析http协议的方式

@WebServlet(name="ImageUploadServlet", urlPatterns={"/services/imageUpload"})
public class ImageUploadServlet extends HttpServlet {

    private static Logger logger = LoggerFactory.getLogger(ImageUploadServlet.class);
    private String rootDir = null;
    private String contextPath = null;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter writer = response.getWriter();
        writer.write("call POST with multipart form data");
    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        logger.info("============================开始上传图片============================");

        rootDir = this.getServletConfig().getServletContext().getRealPath("/");//项目根目录
        contextPath = request.getContextPath();
        System.out.println("=====rootDir==="+ rootDir);
        ResponseBean resp = new ResponseBean();
        ServletFileUpload uploadHandler = new ServletFileUpload(new DiskFileItemFactory());
        PrintWriter writer = response.getWriter();
        uploadHandler.setHeaderEncoding("utf-8");    
        Map<String,String> fieldMap = new HashMap<String, String>();

        Map<String, String> imageConfigMap = SysConfig.getImageServer("1");

        System.out.println("====imageConfigMap==="+ imageConfigMap);

        try {
            System.out.println("request"+ request);
            List<FileItem> items = uploadHandler.parseRequest(request);
            System.out.println("==List<FileItem>=="+ items);
            for (FileItem item : items) {
                if(item.isFormField()){
                    String name = item.getFieldName();
                    BufferedReader br = new BufferedReader(new InputStreamReader(item.getInputStream()));
                    StringBuffer sb = new StringBuffer("");
                    String line = null;
                    while((line = br.readLine()) != null){
                        sb.append(line);
                    }
                    fieldMap.put(name, sb.toString().trim());
                }
            }


            for (FileItem item : items) {
                if (!item.isFormField()) {
                    String dirName = imageConfigMap.get("tempDir");
                    File fileDir = null;
                    if(rootDir.trim().endsWith(File.separator)){
                        fileDir = new File(rootDir + dirName);
                    }else{
                        fileDir = new File(rootDir + File.separator + dirName);
                    }               
                    if(!fileDir.isDirectory()){
                        System.out.println("====创建文件夹"+ fileDir.getAbsolutePath());
                        fileDir.mkdirs();
                    }

                    String fileName = DateTimeUtil.getTimeStamp()+CommonTool.getRandom(3,1000)+item.getName().substring(item.getName().lastIndexOf("."));
                    System.out.println("===文件名=="+ fileName );

                    File file = new File(fileDir.getPath()+"/"+fileName);               
                    if(!file.exists()){                 
                        file.createNewFile();
                    }
                    item.write(file);
                    //判断类型进行 图片的转换和 转移
                    handleImage(fieldMap, file, resp);
                    break; // assume we only get one file at a time
                }
            }


        } catch (Exception e) {     
            resp.setCode(2);
            resp.setMessage("上传失败:"+e.toString());
            e.printStackTrace();
            throw new RuntimeException(e);
        } finally {
            resp.setTimestamp(DateTimeUtil.getTimeStamp());
            String result = JSON.toJSONString(resp);
            writer.write(result);
            logger.debug(result);
            logger.info("============================结束上传图片============================");
            writer.close();
        }
    }

    private void handleImage(Map<String,String> fieldMap, File imageFile, ResponseBean resp){

        Map<String, String> imageConfigMap = SysConfig.getImageServer("1");

        //开始事物
//      SqlSession session = SessionFactory.getSessionFactory().openSession();
        File destFile = null;
        try {   
            String imageType = fieldMap.get("ImageType");      //图片类型           

            System.out.println("==imageType=="+ imageType);

            if(imageType.equalsIgnoreCase("headPhotos")){      // 如果是头像
                String user_id = fieldMap.get("UserId");       //用户ID
                String user_type = fieldMap.get("UserType");   //用户类型

                System.out.println("==user_id=="+ user_id);
                System.out.println("==user_type=="+ user_type);

                File fileDir = null;
                if(rootDir.trim().endsWith(File.separator)){
                    fileDir = new File(rootDir + "images"+File.separator+imageType+File.separator+user_type);
                }else{
                    fileDir = new File(rootDir + File.separator + "images"+File.separator+imageType+File.separator+user_type);
                }
                if(!fileDir.isDirectory()){
                    fileDir.mkdirs();
                }

                System.out.println("===fileDir.getPath()==="+ fileDir.getPath());

                destFile = new File(fileDir.getPath()+File.separator+user_id+"_"+DateTimeUtil.getTimeStamp()+imageFile.getName().substring(imageFile.getName().lastIndexOf(".")));

                System.out.println("===destFile.getPath()==="+ destFile.getPath());

                FileUtils.copyFile(imageFile, destFile);
                imageFile.delete();

/**         数据插入    ImageDAO dao = session.getMapper(ImageDAO.class);  **/

                Map<String, Object> paramsMap = new HashMap<String,Object>();
                paramsMap.put("id", user_id);
                paramsMap.put("user_type", user_type);
                paramsMap.put("head_photo", "images"+"/"+imageType+"/"+user_type+"/"+destFile.getName());

/**             int num = dao.modHeadPhoto(paramsMap);   **/



                System.out.println("======返回值=========");
                Map<String, Object> data = new HashMap<String,Object>();
                data.put("image_name", destFile.getName());
                data.put("image_url", imageConfigMap.get("showServer")+contextPath+"/"+paramsMap.get("head_photo"));
                resp.setData(data);

            }


        } catch (Exception e) {
            e.printStackTrace();
            resp.setCode(3);
            resp.setMessage("上传失败:"+e.toString());
//          session.rollback();
        } finally{  
//          session.commit();
            try {
//              if(!session.getConnection().isClosed()){
//                  session.close();
//              }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

客户端测试，可以用工具

或者java 代码直接测

public class DDDD {  
    public static void main(String[] args) {

        try {

            //普通参数
            ArrayList<FormFieldKeyValuePair> ffkvp = new ArrayList<FormFieldKeyValuePair>();
            //文件参数
            ArrayList<UploadFileItem> ufi = new ArrayList<UploadFileItem>();  


            ffkvp.add(new FormFieldKeyValuePair("UserId", "50"));//其他参数  
            ffkvp.add(new FormFieldKeyValuePair("UserType", "cy"));  


            ffkvp.add(new FormFieldKeyValuePair("ImageType", "headPhotos"));
            ffkvp.add(new FormFieldKeyValuePair("UserName", "啦啦啦啦啦"));  
            ffkvp.add(new FormFieldKeyValuePair("Phone", "782738738"));  
//          ffkvp.add(new FormFieldKeyValuePair("UserSex", "1"));  
//          ffkvp.add(new FormFieldKeyValuePair("Email", "909090909090@qq.com"));  
//          ffkvp.add(new FormFieldKeyValuePair("Address", "地址："));  
            ffkvp.add(new FormFieldKeyValuePair("IDcard", "09090909090909090"));  

            ufi.add(new UploadFileItem("file","d://wowowo.png"));  


sendHttpPostRequest("http://192.168.0.197:8091/Server/services/imageUpload",
                    ffkvp,ufi);
//      

//      sendHttpPostRequest("http://192.168.0.197:8091/Server/user/changeInfo.do",
//              ffkvp,ufi);

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }




    // 每个post参数之间的分隔。随意设定，只要不会和其他的字符串重复即可。  
    private static final String BOUNDARY = "----------HV2ymHFg03ehbqgZCaKO6jyH";  

    public static String sendHttpPostRequest(String serverUrl,  
            ArrayList<FormFieldKeyValuePair> generalFormFields,  
            ArrayList<UploadFileItem> filesToBeUploaded) throws Exception {  

        // 向服务器发送post请求  

        URL url = new URL(serverUrl/* "http://127.0.0.1:8080/test/upload" */);  

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();  

        // 发送POST请求必须设置如下两行  

        connection.setDoOutput(true);  
        connection.setDoInput(true);  
        connection.setUseCaches(false);  
        connection.setRequestMethod("POST");  
        connection.setRequestProperty("Connection", "Keep-Alive");  
        connection.setRequestProperty("Charset", "UTF-8");  
        connection.setRequestProperty("Content-Type",  
                "multipart/form-data; boundary=" + BOUNDARY);  

        // 头  

        String boundary = BOUNDARY;  

        // 传输内容  

        StringBuffer contentBody = new StringBuffer("--" + BOUNDARY);  

        // 尾  

        String endBoundary = "\r\n--" + boundary + "--\r\n";  

        OutputStream out = connection.getOutputStream();  

        // 1. 处理文字形式的POST请求  
        for (FormFieldKeyValuePair ffkvp : generalFormFields)  {  
              contentBody.append("\r\n")  
            .append("Content-Disposition: form-data; name=\"")  
            .append(ffkvp.key + "\"")  
            .append("\r\n")  
            .append("\r\n")  
            .append(ffkvp.value)  
            .append("\r\n")  
            .append("--")  
            .append(boundary);  
        }  


        String boundaryMessage1 = contentBody.toString();
        out.write(boundaryMessage1.getBytes("utf-8"));  
        // 2. 处理文件上传  
        for (UploadFileItem ufi : filesToBeUploaded)  {  
             contentBody = new StringBuffer();  
             contentBody.append("\r\n")  
            .append("Content-Disposition:form-data; name=\"")  
            .append(ufi.formFieldName + "\"; ") // form中field的名称  
            .append("filename=\"")  
            .append(ufi.fileName + "\"") // 上传文件的文件名，包括目录  
            .append("\r\n")  
            .append("Content-Type:application/octet-stream")  
            .append("\r\n\r\n");  

             String boundaryMessage2 = contentBody.toString();  
             out.write(boundaryMessage2.getBytes("utf-8"));  



             // 开始真正向服务器写文件  

            File file = new File(ufi.fileName);  
            DataInputStream dis = new DataInputStream(new FileInputStream(file));  
            int bytes = 0;  
            byte[] bufferOut = new byte[(int) file.length()];  
            bytes = dis.read(bufferOut);  
            out.write(bufferOut, 0, bytes);  
            dis.close();  
            contentBody.append("------------HV2ymHFg03ehbqgZCaKO6jyH");  
            String boundaryMessage = contentBody.toString();
            out.write(boundaryMessage.getBytes("utf-8"));  
            // System.out.println(boundaryMessage);  
        }  

        out.write("------------HV2ymHFg03ehbqgZCaKO6jyH--\r\n"  
                .getBytes("UTF-8"));  

        // 3. 写结尾  

        out.write(endBoundary.getBytes("utf-8"));  
        out.flush();  
        out.close();  

        // 4. 从服务器获得回答的内容  

        String strLine = "";  
        String strResponse = "";  
        InputStream in = connection.getInputStream();  
        BufferedReader reader = new BufferedReader(new InputStreamReader(in,"utf-8")); 
        while ((strLine = reader.readLine()) != null)  {  
            strResponse += strLine + "\n";  
        }  

         System.out.print(strResponse);
        return strResponse;  

    }  





     static class FormFieldKeyValuePair {  
        // such as "username" in "<inputtype="text" name="username"/>"  
        public String key;  
        // such as "Patrick" the abovementioned formfield "username"  
        public String value;  
        public FormFieldKeyValuePair(String key, String value){  
            this.key = key;  
            this.value = value;  
        }  
    }  



    static class UploadFileItem implements Serializable{  
        // such as "upload1" in "<inputtype="file" name="upload1"/>"  
        public String formFieldName;  
        // such as "E:\\some_file.jpg"  
        public String fileName;  
        public UploadFileItem(String formFieldName, String fileName){  
            this.formFieldName = formFieldName;  
            this.fileName = fileName;  
        }  

    }  

}