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配置虚拟路径可以让多个项目使用共同文件夹,达到资源共用的目的
高版本的myeclipse自带tomcat,在java工作区/Servers/MyEclipse Tomcat v8.5-config/
在host标签内加入
<Context path="/upload" docBase="F:/javawebfile" reloadable="false" />
img标签显示
<img src='/upload/20190818171921-hyd.jpg' width="146" height="148">
文件上传servlet:https://www.idaobin.com/archives/2068.html
文件上传spring
/** * 日期-文件名 * @return */ private String getDate() { SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); String dt=df.format(new Date()); return dt; } @RequestMapping(value = "/fileUpload") @ResponseBody public String fileUpload2(@RequestParam("file") CommonsMultipartFile file) throws IOException { long startTime = System.currentTimeMillis(); System.out.println("fileName:" + file.getOriginalFilename()); //String path = getServletContext().getRealPath("/"); + file.getOriginalFilename(); String path = "f:/" + getDate()+ "-" + file.getOriginalFilename(); System.out.println(path); File newFile = new File(path); // 通过CommonsMultipartFile的方法直接写文件(注意这个时候) file.transferTo(newFile); long endTime = System.currentTimeMillis(); System.out.println("方法二的运行时间:" + String.valueOf(endTime - startTime) + "ms"); return "success"; }
xml配置
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>
前端html代码
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <script type="text/javascript" src="https://www.idaobin.com/js/jquery-3.2.1.js"></script> <script type="text/javascript" src="https://www.idaobin.com/test/ajaxfileupload.js"></script> <script type="text/javascript"> function ajaxFileUpload() { $.ajaxFileUpload( { url : 'fileUpload', //用于文件上传的服务器端请求地址 secureuri : false, //一般设置为false fileElementId : 'file', //文件上传空间的id属性 <input type="file" id="file" name="file" /> dataType : 'text', //返回值类型 一般设置为json success : function(data, status) //服务器成功响应处理函数 { //方法一,用后台返回值 alert(data); //后台out输出的值 }, error : function(data, status, e) //服务器响应失败处理函数 { //方法一,用后台返回值 alert(data); //后台out输出的值 } } ) return false; } </script> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <!-- form表单提交方式 --> <form name="Form2" action="fileUpload" method="post" enctype="multipart/form-data"> <input type="file" name="file"> <input type="submit" value="upload" /> </form> <!-- ajax提交方式 --> <input type="file" id="file" name="file" /> <br /> <input type="button" value="上传" onclick="return ajaxFileUpload();"> <br> <p> <span id="myspan"></span> <img id="sctx" src='/upload/20190818171921-hyd.jpg' width="146" height="148"> </p> </body> </html>
注意:
1.文件上传路径要与虚拟路径一致
2.过滤器把图片文件过滤掉导致404
原文链接:https://www.idaobin.com/archives/2102.html
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