Java通过jersey实现客户端图片上传示例

 <dependency>    <groupId>com.sun.jersey</groupId>    <artifactId>jersey-client</artifactId>    <version>1.2</version> </dependency>

<!--  readonly      Is this context "read only", so HTTP    --><!--            commands like PUT and DELETE are      --><!--            rejected? [true]             -->

<servlet>  <servlet-name>default</servlet-name>  <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>  <!-- 添加，解决jersey上传服务器403错误 -->  <init-param>    <param-name>readonly</param-name>    <param-value>false</param-value>  </init-param>  <init-param>    <param-name>debug</param-name>    <param-value>0</param-value>  </init-param>  <init-param>    <param-name>listings</param-name>    <param-value>false</param-value>  </init-param>  <load-on-startup>1</load-on-startup></servlet>

@Controller@RequestMapping("/upload")public class UploadController extends BaseController {  @RequestMapping(value = "/uploadPic", method = RequestMethod.POST)  @LoginCheck  public void uploadPic(HttpServletRequest request, PrintWriter out, String lastRealPath) throws IOException {    // 将当前上下文初始化给CommonsMultipartResolver    CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());    // 检查form中是否有enctype＝"multipart／form－data"    if (resolver.isMultipart(request)) {      // 强制转化request      MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;      // 从表单获取input名称      Iterator<String> iterable = req.getFileNames();      // 存在文件      if (iterable.hasNext()) {        String inputName = iterable.next();        // 获得文件        MultipartFile mf = req.getFile(inputName);        byte[] mfs = mf.getBytes();        // 定义文件名        String fileName = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date());        Random random = new Random();        for (int i = 0; i < 3; i++) {          fileName = fileName + random.nextInt(10);        }        // 获得后缀名        String oriFileName = mf.getOriginalFilename();        String suffix = oriFileName.substring(oriFileName.lastIndexOf("."));        // 要上传文件的绝对路径        String realPath = MallUtil.readProp("upload_file_path") + "/upload/" + fileName + suffix;        String relativePath = "/upload/" + fileName + suffix;        // 由于我们要在不同主机上上传文件，所以不能直接通过流的方式来写，需要通过webService来完成，这边借助Jersey来完成        Client client = Client.create();        // 判断是不是第一次上传，如果已经上传过则删除上一次上传的文件       if (StringUtils.isNotBlank(lastRealPath)) {         WebResource webService = client.resource(lastRealPath);         webService.delete();       }       WebResource webService = client.resource(realPath);       // 将文件传到主机上       webService.put(mfs);       // 将图片信息返回给界面回显       Map<String, String> map = new HashMap<String, String>();       map.put("realPath", realPath);       map.put("relativePath", relativePath);       // {"relativePath":"/upload/20170215135233634679.png","realPath":"http://localhost:8088/mall-file/upload/20170215135233634679.png"}       out.write(JsonUtil.jsonString(map));      }    }  }}

<form enctype="multipart/form-data" id="form">   <div>  ![](${path}/mall/image/load_image.png)  <input type="file" id="input-image" name="input-image" onchange="submitUpload()">  <input id="input-relative-path" name="imgs" type="hidden" >  <input id="input-last-path" type="hidden"> </div></form>

function submitUpload() {  var option = {    url: path + "/upload/uploadPic.do",    type: "post",    dataType: "text", // 返回值的数据类型    beforeSubmit: function (formData, jqForm, options) {      var imageValue = $("#input-image").val();      imageValue = $.trim(imageValue);      return (imageValue != ""); // 没有选择图片，则中断上传请求    },    success: function (responseText) {      // {"relativePath":"/upload/20170215135233634679.png","realPath":"http://localhost:8088/mall-file/upload/20170215135233634679.png"}      var jsonObj = $.parseJSON(responseText);      $("#image").attr("src", jsonObj.realPath);      $("#input-relative-path").val(jsonObj.relativePath);      $("#input-last-path").val(jsonObj.realPath);    },    error: function () {      alert("系统错误");    }  };   $("#form").ajaxSubmit(option);}