spring-xml文件配置

<!-- 文件上传组件 -->

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" >

</bean>

表单页面

//表单必须用post

<form action="upLoad" method="post" enctype="multipart/form-data">

文件:<input type="file" name="upLoadFile" ><br/>

</br>

<input type="submit" value="提交"/>

</form>

控制器处理

 

@Controller

@RequestMapping("/xw")

public class XwController {

@RequestMapping("/upLoad")

public String upLoad(MultipartFile upLoadFile,HttpSession session) throws IOException{

//uploadFile和表单中的file的name一致

if(upLoadFile.getSize()<=0){

session.setAttribute("message", "未选择文件！");

return "false";

}else if(upLoadFile.getSize()>1024*2*1024){

session.setAttribute("message", "文件过大！");

return "false";

}else{

//获取文件名作为保存到服务器的文件名称

String fileName=upLoadFile.getOriginalFilename();

//将上传的文件转成Byte数组

byte [] bytes = upLoadFile.getBytes();

//前半部分路径，目录

String leftPath=session.getServletContext().getRealPath("/WEB-INF/files");

File file=new File(leftPath);

if(!file.exists()){

file.mkdirs();

}

File child=new File(file, fileName);

child.createNewFile();

FileOutputStream fos=new FileOutputStream(child);

fos.write(bytes);

session.setAttribute("message", "上传成功！");

return "success";

}

}

@RequestMapping("/index")

public String index(){

return "index";

}

}