基于SpringMVC的上传功能
1丶在SpringMVC的项目的基础之上，加入上传下载的jar包
2丶在SpringMVC的配置文件中加入用于上传下载的Bean
<!-- 配置用于上传的MultipertResolver --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 设置字符编码 --> <property name="defaultEncoding" value="UTF-8"></property> <!-- 设置上传的maxUploadSize --> <property name="maxUploadSize" value="102400"></property> </bean>
3丶编写Controller
package com.imooc.controller; import java.io.File; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.multipart.MultipartFile; @Controller public class UploadAction { // 文件上传功能 @RequestMapping("/fileUpload.action") public String fileUpload(MultipartFile file,HttpServletRequest request) throws Exception { if (!file.isEmpty()) { //打印文件的名称 //System.out.println("FileName:" + file.getOriginalFilename()); //确定上传文件的位置 String path = request.getServletContext().getRealPath("/fileupload"); //String path = "E:/WorkSpace1/SpringMVCDemo/WebContent/WEB-INF/fileupload"; File newFile = new File(path, file.getOriginalFilename()); if (!newFile.exists()) { newFile.createNewFile(); } // 上传 file.transferTo(newFile); } //上传成功后转发到success.jsp return "success"; } }
4丶编写JSP页面
注意：form的一个属性值 enctype="multipart/form-data"
<form action="fileUpload.action" method="post" enctype="multipart/form-data"> File<input type="file" name="file"> <input type="submit"> </form>
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基于文件的下载功能
1丶在上面的基础上
2丶编写DownLoadAction
package com.imooc.controller; import java.io.File; import org.apache.commons.io.FileUtils; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class DownLoadAction { @RequestMapping("/fileDownLoad.action") public ResponseEntity<byte[]> fileDownload() throws Exception { //文件的路径，当然你可以自己拼接 String path = "E:/WorkSpace1/SpringMVCDemo/WebContent/WEB-INF/fileupload/1.png"; File file = new File(path); HttpHeaders headers = new HttpHeaders(); // 为了解决中文名称乱码问题 String fileName = new String(file.getName().getBytes("UTF-8"), "iso-8859-1"); headers.setContentDispositionFormData("attachment", fileName); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED); } }
