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一直以为ajax不能做上传,直到最近看了一些文章。代码和相关配置如下:
js代码:
<script> //ajax 无刷新上传文件 function ajaxFileUpload() { //判断是否选择文件 if($("#uploadFile").val() == null || $("#uploadFile").val()==""){ alert("请选择需要上传的文件!"); return; } //判断后缀名 var filepath=$("#uploadFile").val(); var extStart=filepath.lastIndexOf("."); var ext=filepath.substring(extStart,filepath.length).toUpperCase(); if(".xls".toUpperCase() !=ext ){ alert("只能上传Excel97-2003工作簿文件(xls)"); return false; } //判断文件大小 var file = $(‘#uploadFile‘).get(0).files[0]; if (file) { var fileSize = 0; if (file.size > 2*1024 * 1024) { alert("上传的文件大小不能超过2MB,请核对后重试!"); return false; } } $("#loading") .ajaxStart(function () { $(this).show(); })//开始上传文件时显示一个图片 .ajaxComplete(function () { $(this).hide(); });//文件上传完成将图片隐藏起来 $.ajaxFileUpload ( { url: ‘<%=request.getContextPath()%>/server/doUploadAndInsert.action‘,//用于文件上传的服务器端请求地址 secureuri: false,//一般设置为false fileElementId: ‘uploadFile‘,//文件上传空间的id属性 <input type="file" id="file" name="file" /> dataType: ‘json‘,//返回值类型 一般设置为json success: function (result) { var msgBean = result; alert(msgBean.msgText); } }); return false; } </script>
html代码:
<div id="page-content" class="clearfix" style="padding-top: 20"> <form id="myform" enctype="multipart/form-data" method="post" action="<%=request.getContextPath()%>/server/doUploadAndInsert.action"> <span style="font-size: 15px;"> 选择文件<span style="color: #c91523">(*.xls格式)</span>: </span> <input id="uploadFile" type="file" style="font-size: 15px" label="浏览" name="uploadFile" accept="application/xls"></file> </form> <input type="button" style="margin: 0 0 20 370;font-size: 15px" class="btn btn-large btn-pink save-right" value="导入" onclick="return ajaxFileUpload();"/> </div>
struts2 配置:
<package name="server" extends="interceptorPackge" namespace="/server"> <action name="doUploadAndInsert" class="serverBaseInfoAction" method="doUploadAndInsert" > <result type="plainText" /> <param name="savePath">uploadTemp</param> </action>
</package>
后端struts2 action代码:
// 上传文件所需属性 private String title; private File uploadFile; private String uploadFileContentType; private String SavePath; private String uploadFileFileName; Log log = LogFactory.getLog(this.getClass());public String doUploadAndInsert() throws Exception { PrintWriter out = null; MsgBean msg = new MsgBean(); try { HttpServletResponse response = ServletActionContext.getResponse(); response.setContentType("text/html;charset=utf-8"); out = response.getWriter(); if(getUploadFile().length()>2097152){ msg.setMsgName("SysDefectAction_doDefUploadAndInsert_fail"); msg.setMsgText(getUploadFileFileName()+"上传失败,文件太大。\r\n请不要上传超过2048KB的文件"); out.write(JSON.toJSONString(msg)); out.flush(); return null; } //后缀名限制 String suffixName = getUploadFileFileName().split("\\.")[1]; if(!"xls".equalsIgnoreCase(suffixName)){ msg.setMsgName("SysDefectAction_doDefUploadAndInsert_fail"); msg.setMsgText(getUploadFileFileName()+"上传失败,错误的文件格式!"); out.write(JSON.toJSONString(msg)); out.flush(); return null; } UUID uuid = UUID.randomUUID(); ServletContext servletContext = (ServletContext) ActionContext.getContext().get(ServletActionContext.SERVLET_CONTEXT); String rootPath = servletContext.getRealPath("/"); File folder = new File(rootPath + "\\" + getSavePath()); if (!folder.exists()) { folder.mkdir(); } FileOutputStream fileOutputStream = new FileOutputStream(rootPath + "\\" + getSavePath() + "\\" + uuid+"_"+getUploadFileFileName()); FileInputStream fileInputStream = new FileInputStream(getUploadFile()); byte[] buffer = new byte[1024]; int len = 0; while ((len = fileInputStream.read(buffer)) > 0) { fileOutputStream.write(buffer, 0, len); } fileInputStream.close(); log.info("上传文件接收成功,文件存放全路径为:" + rootPath + "/" + uuid+"_"+getUploadFileFileName()); } catch (Exception e){ msg.setMsgName("SysDefectAction_doDefUploadAndInsert_fail"); msg.setMsgText(getUploadFileFileName()+"上传失败,"+e.getMessage()); out.write(JSON.toJSONString(msg)); out.flush(); } finally{ out.close(); return null; } }
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原文地址:http://www.cnblogs.com/onmyway20xx/p/4560523.html