[应用架构] SpringMVC文件上传例子
1.上传用到的一些表单控件,如下所示：
<div class="std_photo">
"pictureImage1" name="pictureImage1" src="${userDto.pictureImage}" height="200" width="100" />
"hidden" id="pictureImage" name="pictureImage" value="">
"file" type="file" name="file" />
"button" value="保存" class="btn" />
</div>
其中 类型type为hidden的控件为一个隐藏域，它专门用来用userDto里面的pictureImage交互的。而img图片控件同userDto.pictureImage绑定起来。 通过点击保存响应一个ajax事件.
2.ajax响应事件，如下所示：
function ajaxFileUpload() {
$.ajaxFileUpload({
'FileUploadForm.do?method=uploadAjax', // 需要链接到服务器地址
false,
'file', // 文件选择框的id属性
'json', // 服务器返回的格式，可以是json
function(data, status) // 相当于java中try语句块的用法
{
//alert("成功: " + data.path);
"#pictureImage1")[0].src = data.path;
"#pictureImage").val(data.path);
},
function(data, status, e) // 相当于java中catch语句块的用法
{
"失败");
}
});
}注意：这个ajax事件用到了一个JS文件，为：
<script type="text/javascript" src="${contextPath}/js/base/user/ajaxfileupload.js"></script>
这个要在jsp文件头上面进行申明，才可以使用。
3.ajax文件中使用到的文件上传控制器，如下所示：
/*
* Copyright (C) 2012 GZ-ISCAS Inc., All Rights Reserved.
*/
package cn.ac.iscas.gz.nssc.base.web.user;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.util.FileCopyUtils;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
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.multipart.MaxUploadSizeExceededException;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.RedirectView;
import cn.ac.iscas.gz.nssc.base.domain.UploadForm;
/**
* @ClassName: UploadFormController
* @Description: 文件上传控制器controller
* @author xuzhongming Email： xuzhongming@gz.iscas.ac.cn
* @date 2012-2-23 - 下午3:34:43
* @version : 1.0
*/
@Controller
@RequestMapping(value = "/FileUploadForm.do")
public class UploadFormController {
@RequestMapping(params = "method=uploadAjax")
public void uploadAjax(@RequestParam(value = "file") MultipartFile file,
HttpServletRequest request, HttpServletResponse response) {
String uploadDirPath = request.getSession().getServletContext()
"/upload");
MultipartFile image = file;
new File(uploadDirPath + "/"
+ image.getOriginalFilename());
try {
FileCopyUtils.copy(image.getBytes(), destFile);
catch (IOException e) {
e.printStackTrace();
}
"/upload/"
+ destFile.getName();
try {
new JSONObject();
"path", destPath);
"text/html");
response.getWriter().println(jsonObject.toString());
catch (IOException e) {
e.printStackTrace();
}
}
}4.在配置文件中注册
<!-- Configure the multipart resolver -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver"
p:defaultEncoding="utf-8"
>
<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="1024000"/>
</bean>
这样就可以实现文件的上传了。
5.实现效果如下所示：
参考地址：
http://www.open-open.com/home/space-668-do-blog-id-5708.html
