一、配置SpringMVC二、单文件与多文件上传三、多文件上传四、带参数上传
一、配置SpringMVC
在spring.xml中配置:
<!-- springmvc文件上传需要配置的节点--><bean id="multipartResolver" class="org.springframework.monsMultipartResolver"><property name="maxUploadSize" value="-1"/><property name="defaultEncoding" value="UTF-8"/><property name="resolveLazily" value="false"/><property name="uploadTempDir" value="/statics/document/tempdir"/><!--<property name="maxInMemorySize" value="104857600"/>--></bean>
其中属性详解:
defaultEncoding="UTF-8" 是请求的编码格式,默认为iso-8859-1
maxUploadSize="-1 是上传文件的大小,单位为字节 -1表示无限制
uploadTempDir="fileUpload/temp" 为上传文件的临时路径
二、单文件与多文件上传
1、单文件上传
jsp:
<body> <h2>文件上传实例</h2> <form action="fileUpload.html" method="post" enctype="multipart/form-data"> 选择文件:<input type="file" name="file"> <input type="submit" value="提交"> </form> </body>
注意要在form标签中加上enctype="multipart/form-data"表示该表单是要处理文件的!
controller:
@RequestMapping("fileUpload") public String fileUpload(@RequestParam(value = "file", required = false) MultipartFile file) { // 判断文件是否为空 if (!file.isEmpty()) { try { // 文件保存路径 String filePath = request.getSession().getServletContext().getRealPath("/") + "upload/" + file.getOriginalFilename(); // 转存文件 file.transferTo(new File(filePath)); } catch (Exception e) { e.printStackTrace(); } } // 重定向 return "redirect:/list.html"; }
注意RequestParam参数中value的名字要与jsp中的相互匹配,否则会找不到返回空指针
transferTo是存储文件的核心方法,但是这个方法同一个文件只能使用一次,不能使用第二次,否则tomcat服务器会报500的错误
MultipartFile类常用的一些方法:
String getContentType()//获取文件MIME类型
InputStream getInputStream()//后去文件流
String getName() //获取表单中文件组件的名字
String getOriginalFilename() //获取上传文件的原名
long getSize() //获取文件的字节大小,单位byte
boolean isEmpty() //是否为空
void transferTo(File dest)//保存到一个目标文件中。
三、多文件上传
与上面的相同只不过是form里面多创建几个input
如果需要使用一个标签控件上传多个文件,需要使用js插件uploadify
博主备份的下载地址(该版本为flash版本,不推荐,HTML5版本请自行去官网下载):uploadify.rar(解压密码:www.crowsong.xyz):/fs/2276132-30464
jsp:
<body> <h2>上传多个文件 实例</h2> <form action="filesUpload.html" method="post" enctype="multipart/form-data"> <p> 选择文件:<input type="file" name="files"> <p> 选择文件:<input type="file" name="files"> <p> 选择文件:<input type="file" name="files"> <p> <input type="submit" value="提交"> </form> </body>
controller:
private boolean saveFile(MultipartFile file) { // 判断文件是否为空 if (!file.isEmpty()) { try { // 文件保存路径 String filePath = request.getSession().getServletContext().getRealPath("/") + "upload/" + file.getOriginalFilename(); // 转存文件 file.transferTo(new File(filePath)); return true; } catch (Exception e) { e.printStackTrace(); } } return false; } @RequestMapping("filesUpload") public String filesUpload(@RequestParam("files") MultipartFile[] files) { //判断file数组不能为空并且长度大于0 if(files!=null&&files.length>0){ //循环获取file数组中得文件 for(int i = 0;i<files.length;i++){ MultipartFile file = files[i]; //保存文件 saveFile(file); } } // 重定向 return "redirect:/list.html"; }
四、带参数上传
还是使用form表单进行上传,但是上传文件的时候要带上一部分的参数
例子form上传使用多个input上传多个文件并且携带参数
jsp:
其中使用了ajaxForm插件,并没有展示出来
<form method="post" enctype="multipart/form-data" id="uploadForm"action="${pageContext.request.contextPath}/background/worksInsert">作品名称:<input type="text" name="name" id="name"><br>参赛年份:<input type="text" name="year" id="year"><br>参加竞赛:<select name="competition" id="competition"><option value="请选择">请选择</option></select><br>源文件上传:<input type="file" name="file1" id="file1"><br>展示文件上传:<input type="file" name="file2" id="file2"><br>附件上传:<input type="file" name="file3" id="file3"><br><input type="submit" value="提交"></form>
controller:
主要是参数的书写,通过不同的value取到不同得文件,同时request.getParameter方法取到参数的值
@RequestMapping("/worksInsert")@ResponseBodypublic MessageCarrier worksInsert(@RequestParam(value = "file1", required = false) MultipartFile file1, @RequestParam(value = "file2", required = false) MultipartFile file2, @RequestParam(value = "file3", required = false) MultipartFile file3, HttpServletRequest request) throws IOException {MessageCarrier messageCarrier = new MessageCarrier();if (file1 == null || request.getParameter("name") == null) {return null;}// 获取源文件存储路径String filename = request.getParameter("name");String sworks = savePathL("works") + "/" + filename;String vworks = savePathL("works") + "/" + filename;String fworks = savePathL("works") + "/" + filename;String sRealworks = System.getProperty("studentSystem.root") + sworks.substring(1, sworks.length());String sRealvworks = System.getProperty("studentSystem.root") + vworks.substring(1, vworks.length());String sRealfworks = System.getProperty("studentSystem.root") + fworks.substring(1, fworks.length());DBWorks dbWorks = new DBWorks();CompetitionWorks competitionWorks = new CompetitionWorks();// System.out.println(request.getParameter("name"));competitionWorks.setWorksName(request.getParameter("name"));competitionWorks.setWorksYear(request.getParameter("year"));competitionWorks.setWorksComID(request.getParameter("competition"));competitionWorks.setWorksIsIndex("0");competitionWorks.setWorksNeedUpdate("0");competitionWorks.setWorksSavePath(sworks + "/" + file1.getOriginalFilename());// 如果有展示文件获取展示文件的存储路径if (file2 != null && file2.getSize() != 0) {competitionWorks.setWorksSaveViewPath(vworks + "/" + file2.getOriginalFilename());} else {competitionWorks.setWorksSaveViewPath("NULL");}// 如果有附件的话获取附件的存储路径并保存if (file3 != null && file3.getSize() != 0) {competitionWorks.setWorksSaveFilePath(fworks + "/" + file3.getOriginalFilename());} else {competitionWorks.setWorksSaveFilePath("NULL");}//先将内容设置为NULLcompetitionWorks.setWorksContent("NULL");messageCarrier = dbWorks.worksInsert(competitionWorks);switch (messageCarrier.getMessageContent()) {case "OK": {FilesUpload filesUpload = new FilesUpload();messageCarrier = filesUpload.upload(file1, sRealworks);if (!competitionWorks.getWorksSaveViewPath().equals("NULL")) {messageCarrier = filesUpload.upload(file2, sRealvworks);}if (!competitionWorks.getWorksSaveFilePath().equals("NULL")) {messageCarrier = filesUpload.upload(file3, sRealfworks);}//如果上传成功则解析内容并将其录入数据库if (messageCarrier.getMessageContent().equals("OK")) {String path = competitionWorks.getWorksSavePath();String filePath = System.getProperty("studentSystem.root") + path;String fileName = path.substring(path.lastIndexOf("/") + 1);File file = new File(filePath);//解析文件内容FilesToContent filesToContent = new FilesToContent();String content = filesToContent.resolve(file);// System.out.println(content);competitionWorks.setWorksContent(content);messageCarrier = dbWorks.worksUpdateName(competitionWorks);}}break;default: {return messageCarrier;}}return messageCarrier;}
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