关于springmvc上传文件的具体介绍可参看spring的官方文档 The Web模块 这里只总结具体的简单代码实现。
1.springMVC单文件上传
1.1 解析器配置 1.1.1 使用CommonsMultipartResolver
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- one of the properties available; the maximum/maxmemery file size in bytes --> <property name="maxUploadSize" value="12345678900"/> <property name="maxInMemorySize" value="20480"/> <property name="defaultEncoding" value="UTF-8"/> </bean>CommonsMultipartResolver， 需要使用commons-fileupload.jar包
1.1.2 使用CosMultipartResolver
<bean id="multipartResolver" class="org.springframework.web.multipart.cos.CosMultipartResolver"> <!-- one of the properties available; the maximum/maxmemery file size in bytes --> <property name="maxUploadSize" value="12345678900"/> <property name="maxInMemorySize" value="20480"/> <property name="defaultEncoding" value="UTF-8"/> </bean>CosMultipartResolver， 需要使用cos.jar包
1.2 表单配置
<html> <head> <title>Upload a file please</title> </head> <body> <h1>Please upload a file</h1> <form method="post" action="upload.form" enctype="multipart/form-data"> <input type="file" name="file"/> <input type="submit"/> </form> </body> </html>在上面这个表单里有一个input元素，这个元素的名字（“file”）和服务器端处理这个表单的bean中类型为byte[]的属性名相同。 在这个表单里我们也声明了编码参数（enctype=”multipart/form-data”）以便让浏览器知道如何对这个文件上传表单进行编码
1.3 定义 controller类实现上传的具体逻辑
@Controller public class UploadController { @RequestMapping("/fileupload") public String upload(@RequestParam("filename") CommonsMultipartFile file , HttpServletRequest req) throws IOException { //解析路径 String path = req.getRealPath("/fileupload"); //解析文件名 String filename = file.getOriginalFilename(); //新建file对象 File targetFile = new File(path,filename); //判断文件是否存在 if (!targetFile.exists()){ targetFile.mkdirs();//不存在新建 } file.transferTo(targetFile); //成功后返回的页面 return "index.jsp"; }2 多文件上传 解析器相同不需要配置
2.1 配置表单
<form action="uploadfiles" method="post" enctype="multipart/form-data"> <input type="file" name="filename"/><br> <input type="file" name="filename"/><br> <input type="file" name="filename"/><br> <input type="submit" value="确定"/> </form>2.2 定义controller类
@RequestMapping("/uploadfiles") public String uploadFiles(@RequestParam("filename")CommonsMultipartFile[] files ,HttpServletRequest req) throws IOException { String path = req.getRealPath("/fileupload"); for (int i = 0; i < files.length; i++) { InputStream is = files[i].getInputStream(); OutputStream os = new FileOutputStream(new File(path,files[i].getOriginalFilename())); int len = 0; byte[] buffer = new byte[1024]; while ((len = is.read(buffer))!=-1){ os.write(buffer,0,len); } os.close(); is.close(); } return "index.jsp"; } 相关资源：SpringMVC 单文件上传与多文件上传实例