须要jar包html
<!-- 文件上传 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3</version> </dependency>
jsp页面java
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>文件上传下载</title>
</head>
<body>
<form method="post" action="<%=request.getContextPath() %>/doUpload.do" enctype="multipart/form-data">
<input type="file" name="file"/>
<button type="submit" >提交</button>
</form>
<hr>
<form action="<%=request.getContextPath() %>/down.do" method="get">
<input type="submit" value="下载">
</form>
</body>
</html>
在springmvc文件设置web
<!-- 定义文件解释器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 设置默认编码 --> <property name="defaultEncoding" value="utf-8"></property> <!-- 上传图片最大大小10M--> <property name="maxUploadSize" value="10484880"></property> </bean>
在Controller层添加方法spring
/**
* 上传单个文件操做
* @param RequestParam 括号中的参数名file和表单的input节点的name属性值一致
* @return
*/
@RequestMapping(value="doUpload", method=RequestMethod.POST)
public void doUploadFile(@RequestParam("file") MultipartFile file){
if(!file.isEmpty()){
try {
//这里将上传获得的文件保存目录
FileUtils.copyInputStreamToFile(file.getInputStream(), new File("E:\\temp",
System.currentTimeMillis()+ file.getOriginalFilename()));
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 文件下载功能
* @param request
* @param response
* @throws Exception
*/
@RequestMapping("down")
public void down(HttpServletRequest request,HttpServletResponse response) throws Exception{
//下载路径+文件
String fileName = "E:\\FileDownLoad.zip";
//获取输入流
InputStream bis = new BufferedInputStream(new FileInputStream(new File(fileName)));
//假如以中文名下载的话 重命名下载后的名字
String filename = "下载文件.zip";
//转码，省得文件名中文乱码
filename = URLEncoder.encode(filename,"UTF-8");
//设置文件下载头
response.addHeader("Content-Disposition", "attachment;filename=" + filename);
//1.设置文件ContentType类型，这样设置，会自动判断下载文件类型
response.setContentType("multipart/form-data");
BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());
int len = 0;
while((len = bis.read()) != -1){
out.write(len);
out.flush();
}
out.close();
}