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springmvc异步上传文件
前提条件
注意:bean的id名不能改变
<!-- 上传文件拦截,设置最大上传文件大小 10M=10*1024*1024(B)=10485760 bytes --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="http://www.mamicode.com/10485760" /> <!--<property name="resolveLazily" value="http://www.mamicode.com/true"/>--> </bean>
前台页面upload.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta charset="UTF-8"> <title>Document</title> <script src="http://www.mamicode.com/${pageContext.request.contextPath }/static/jquery/jquery-1.9.1.min.js"></script> <script type="text/javascript" src="http://www.mamicode.com/${pageContext.request.contextPath }/static/jquery/jquery.form.js"></script> <script type="text/javascript"> //这种方式,可以异步请求数据,但是不能异步上传文件 /*使用这种方式,会在后台抛出一个异常: org.springframework.web.multipart.MultipartException: The current request is not a multipart request */ function doUpload(){ $.ajax({ url : "getParamFromFile", type : "POST", data : $(‘#postForm‘).serialize(), success : function(data) { $( ‘#messageTip‘).html(data); $( ‘#messageTip‘).show(); }, error : function(data) { $( ‘#messageTip‘).html(data); $( ‘#messageTip‘).show(); } }); } //使用jquery.form.js的表单插件来提交表单,这个可以异步上传文件 /* function doUpload(){ var options = { url: ‘getParamFromFileForAjax‘,//表单提交的地址。缺省值: 表单的action的值 type: ‘POST‘, dataType:‘text‘, data :{ fileName : ‘uploadFile‘ }, //clearForm: true,//成功提交后,清除所有表单元素的值 //timeout: 3000 ,//限制请求的时间,当请求大于3秒后,跳出请求 // 从服务传过来的数据显示在这个div内部也就是ajax局部刷新 //target: ‘#output1‘, // 处理之后的处理 success: function(data){ alert(data); var result = $.parseJSON(data); alert(result); } }; //使用jquery的ajax upload插件可以上传文件 $(‘#postForm‘).ajaxSubmit(options); } */ </script> </head> <body> <form id="postForm" action="getParamFromFile" method="post" enctype="multipart/form-data"> 上传XML模版文件:<input type="file" name="uploadFile"/> <input type="submit" value="http://www.mamicode.com/上传"/> <input type="button" value="http://www.mamicode.com/获取Json参数数据" onclick="doUpload()"/> <span id="messageTip" hidden="true"></span> </form> </body> </html>
后台Controller代码
//这种是使用传统的form表单提交的,即在前台页面上点击‘上传’按钮上传文件的形式,
//而且在form标签上必须指定enctype="multipart/form-data"
@RequestMapping(value = "http://www.mamicode.com/getParamFromFile",method = RequestMethod.POST) @ResponseBody public Map<String, Object> getParamFromFile(@RequestParam("uploadFile") MultipartFile uploadFile,HttpServletRequest request, HttpServletResponse response) { Map<String, Object> paramMap = new LinkedHashMap<String, Object>(); FileInputStream inputStream = null; try{ String filename = uploadFile.getName(); String originalFilename = uploadFile.getOriginalFilename(); System.out.println("FileName = " + filename); System.out.println("originalFilename = " + originalFilename); inputStream = (FileInputStream) uploadFile.getInputStream(); } catch (IOException e1) { paramMap.put("message", "上传文件错误"); return paramMap; } //String filePath = "E:\\work\\svn\\openeap\\code\\openeap\\src\\main\\webapp\\template\\北京市房屋租赁合同5.xml"; //paramMap = ImportFile.getParamFromFile(filePath); paramMap = ImportFile.getParamFromStream(inputStream); Iterator it = paramMap.entrySet().iterator(); while (it.hasNext()) { Map.Entry e = (Map.Entry) it.next(); System.out.println("参数 Key: " + e.getKey() + "; 参数 Value: " + e.getValue()); } System.out.println("生成的json为: " + JsonMapper.getInstance().toJson(paramMap)); return paramMap; } //jQuery form插件的使用 后台 @RequestMapping(value = "http://www.mamicode.com/getParamFromFileForAjax",method = RequestMethod.POST) @ResponseBody public Map<String, Object> getParamFromFileForAjax(HttpServletRequest request,String fileName) { Map<String, Object> paramMap = new LinkedHashMap<String, Object>(); FileInputStream inputStream = null; //把Request强转成多部件请求对象 MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request; //根据文件名称获取文件对象 CommonsMultipartFile commonsMultipartFile = (CommonsMultipartFile) multipartHttpServletRequest.getFile(fileName); try{ String filename = commonsMultipartFile.getName(); String originalFilename = commonsMultipartFile.getOriginalFilename(); System.out.println("FileName = " + filename); System.out.println("originalFilename = " + originalFilename); inputStream = (FileInputStream) commonsMultipartFile.getInputStream(); } catch (IOException e1) { paramMap.put("message", "上传文件错误"); return paramMap; } //String filePath = "E:\\work\\svn\\openeap\\code\\openeap\\src\\main\\webapp\\template\\北京市房屋租赁合同5.xml"; //paramMap = ImportFile.getParamFromFile(filePath); paramMap = ImportFile.getParamFromStream(inputStream); Iterator it = paramMap.entrySet().iterator(); while (it.hasNext()) { Map.Entry e = (Map.Entry) it.next(); System.out.println("参数 Key: " + e.getKey() + "; 参数 Value: " + e.getValue()); } System.out.println("生成的json为: " + JsonMapper.getInstance().toJson(paramMap)); return paramMap; }
异步上传文件有两种方式:
参考的文章:
http://www.cnblogs.com/zhuxiaojie/p/4783939.html#autoid-1-0-0
springmvc异步上传文件
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