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ajaxFileUpload+springmvc文件上传例子

//文件上传页面             <div >                    <input type="file" id="file" name="file" onchange="ajaxFileUpload();"/>                      <input type="hidden" id="pic" name="pic" />                    </div>

//ajax 实现文件上传   function ajaxFileUpload() { var picpath="";  $.ajaxFileUpload({      url : "../upload/imageUpload",         fileElementId:'file',         dataType : "json",          success: function(data){          $("#picshow").append("<img src='http://www.iherebuy.com:8089/img/tempImg/"+data.fileName+"' width='80px' height='80px'/>")         alert('success');          picpath=$("#pic").val()+data.fileName+",";          $("#pic").val(picpath);         },         error: function(data)         {            alert("上传失败");          }            } );  }

import java.io.File; import java.io.IOException; import java.util.Arrays; import java.util.HashMap;  import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;  import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.log4j.Logger; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.commons.CommonsMultipartFile;  import ease.shopping.util.UUIDGenerator;  /**  * 文件上传类  * @author Administrator  *  */ @RestController @RequestMapping("/upload") public class UploadController {   private static final Logger LOG = Logger.getLogger(UploadController.class);   private static final HashMap<String, String> TypeMap = new HashMap<String, String>();  //设置文件允许上传的类型  static {   TypeMap.put("image", "gif,jpg,jpeg,png,bmp");   TypeMap.put("flash", "swf,flv");   TypeMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");   TypeMap.put("file", "doc,docx,xls,xlsx,ppt,pptx,htm,html,txt,dwg,pdf");  }    // 设置文件上传大小  public static long fileSize = 3 * 1024 * 1024;  /**   * 文件上传   *    * @param file   * @param request   * @return message: -1 没有文件上传 0 上传成功 1 上传失败 2 文件超过上传大小 3 文件格式错误 4 上传文件路径非法 5 上传目录没有写权限   *          *    */  @RequestMapping(value = "/imageUpload", method = RequestMethod.POST)  public void imageUpload(    @RequestParam("file") CommonsMultipartFile file,    @RequestParam(required = false) String filePre, HttpServletRequest request, HttpServletResponse response) {   LOG.info("file name is :" + file.getOriginalFilename());   if (!file.isEmpty()) {       //当文件超过设置的大小时，则不运行上传    if (file.getSize() > fileSize) {     backInfo(response, false, 2, "");     return;    }    //获取文件名后缀    String OriginalFilename = file.getOriginalFilename();    String fileSuffix = OriginalFilename.substring(      OriginalFilename.lastIndexOf(".") + 1).toLowerCase();        //String fileSuffix="jpeg";        //判断该类型的文件是否在允许上传的文件类型内    if (!Arrays.asList(TypeMap.get("file").split(",")).contains(      fileSuffix)) {     backInfo(response, false, 3, "");     return;    }    if (!ServletFileUpload.isMultipartContent(request)) {     backInfo(response, false, -1, "");     return;    }    // 检查上传文件的目录    File uploadDir = new File(SysProperty.BASE_PATH);    if (!uploadDir.isDirectory()) {     if (!uploadDir.mkdir()) {      backInfo(response, false, 4, "");      return;     }    }    // 是否有上传的权限    if (!uploadDir.canWrite()) {     backInfo(response, false, 5, "");     return;    }        //新文件名    String newname = "";    if(null != filePre){     newname += filePre;//对应模块上传的文件名前缀    }     newname += UUIDGenerator.getUUIDrand() + "." + fileSuffix;     try {       //创建文件     File saveFile = new File(SysProperty.BASE_PATH, newname);     //保存文件     file.transferTo(saveFile);     //FileTranser.saveFielByFileName(file, uploadPath, newname);     backInfo(response, true, 0, newname);    } catch (Exception e) {     LOG.error(e.getMessage(), e);     backInfo(response, false, 1, "");     return;    }   } else {    backInfo(response, false, -1, "");    return;   }   }  /**   * 返回json信息   * @param response   * @param flag   * @param message   * @param fileName   */  private void backInfo(HttpServletResponse response, boolean flag, int message,    String fileName) {   String json  = "";   //json=fileName;   if (flag) {    json = "{ /"status/": /"success";    } else {    json = "{ /"status/": /"error";    }   json += "/",/"fileName/": /"" + fileName + "/",/"message/": /"" + message + "/"}";   try {    //response.setContentType("text/javascript");    response.setContentType("text/html; charset=utf-8");    response.getWriter().print(json);    LOG.info(json.toString());   } catch (IOException e) {    LOG.error(e.getMessage(), e);   }  }  }

需要用到的js文件链接：http://pan.baidu.com/s/1kTMZDQ3 密码：rkoq

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