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
代码语言：javascript复制 <!-- 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
代码语言：javascript复制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"
代码语言：javascript复制 <form action="fileUpload.action" method="post" enctype="multipart/form-data">
File<input type="file" name="file">
<input type="submit">
</form>============================================================================================================================
基于文件的下载功能
1丶在上面的基础上
2丶编写DownLoadAction
代码语言：javascript复制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);
}
}3丶编写JSP页面代码
代码语言：javascript复制 <a href="fileDownLoad.action">文件下载</a>
