1.导入jar包(m)
<!-- 文件上传组件 不同的版本号-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
</dependency>
2.导入包之后，需要配置SpringMVC文件上传解析器，在Springmvc配置文件里配置如下。
<!-- 文件上传解析器 -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 最大允许上传文件大小，单位byte -->
<property name="maxUploadSize" value="100000000"/>
</bean>
3.编写JSP代码如下：
<form action="/springmvc01/upload/image.shtml" method="post" enctype="multipart/form-data"> <input type="file" name="userimage" /> <button>提交</button> </form>
4.编写后台代码：
/***
* 文件上传
* @param session
* @param file
* @param model
* @return
* @throws IllegalStateException
* @throws IOException
*/
@RequestMapping(value="/image",method=RequestMethod.POST)
public String upload(HttpSession session,@RequestParam(value="userimage")MultipartFile file,Model model) throws IllegalStateException, IOException{
//文件上传路径
String path = session.getServletContext().getRealPath("/upload");
//文件名字
String fname = (int)(Math.random()*10000)+file.getOriginalFilename();
file.transferTo(new File(path+"/"+fname));
//文件访问路径
String fileurl = "/upload/"+fname;
model.addAttribute("fileurl", fileurl);
return "hello";
}
