SpringMVC实现文件上传方法

SpringMVC实现文件上传方法,只是一个简单的demo，后面有jar下载

1.在spring中配置【上传文件的解析器】

<beanid=“multipartResolver”class=“org.springframework.web.multipart.commons.CommonsMultipartResolver”>

<propertyname=“defaultEncoding”value=“utf-8”/>

<propertyname=“maxUploadSize”value=“10485760”/><!– 上传文件限制 –>

<propertyname=“maxInMemorySize”value=“20480”/><!– 缓存大小 –>

</bean>

2.前台jsp页面

<inputtype=“file”name=“myfile“value=“”>    <inputtype=“button”id=“submit1”value=“提交“/>

<inputtype=“submit”value=“submit”>

</form>

3.后台Controller

@RequestMapping(“/upload”)
public String upload1(@RequestParam(“myfile”) MultipartFile file, HttpServletRequest req) throws Exception {
String filename = file.getOriginalFilename();// 获取文件名称，带后缀
System.out.println(“进入上传!文件名：” + filename);
if (!file.isEmpty()) {
try {
FileOutputStream out = new FileOutputStream(“D:wll/”
+ file.getOriginalFilename().substring(0, file.getOriginalFilename().indexOf(“.”)) + “.hh“); //这是我自己的拼接的新文件名称: 比如:springmvc.hh
InputStream in = file.getInputStream();
int b = 0;
while ((b = in.read()) != -1) {
out.write(b);
}
out.flush();
out.close();
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
return “success”;
}

上面是单个文件上传，如果需要多个文件上传，只需要把前台的name改成一样的，后台的Controller接收的参数改成数组，在遍历数组里把单文件的方法复制过来即可：红色是改动的部分

public String upload(@RequestParam(“myfile”) MultipartFile[] files, HttpServletRequest req) throws Exception {
for (MultipartFile file:files) {
String filename = file.getOriginalFilename();// 获取文件名称，带后缀
System.out.println(“进入上传!文件名：” + filename);
if (!file.isEmpty()) {
try {
FileOutputStream out = new FileOutputStream(“D:wll/”+ file.getOriginalFilename().substring(0, file.getOriginalFilename().indexOf(“.”)) + “.wll”);
InputStream in = file.getInputStream();
int b = 0;
while ((b = in.read()) != -1) {
out.write(b);
}
out.flush();
out.close();
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}