spring mvc上传文件服务器配置

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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;          }      }  }

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