实现分服务器图片上传

springmvc配置文件：

<!--图片上传-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="1024000"/>
</bean>

注意：这里bean的id不能随便取

Controller代码

@Controller
@RequestMapping("/upload")
public class EbUploadController {

@RequestMapping("/uploadPic.do")
public void uploadPic(HttpServletRequest request, Writer out) throws IOException {
//把request转换成复杂request
MultipartHttpServletRequest mr = (MultipartHttpServletRequest) request;
//获得文件
Map<String, MultipartFile> map = mr.getFileMap();
Set<String> set = map.keySet();
Iterator<String> it = set.iterator();
String fileInputName = it.next();
MultipartFile mf = map.get(fileInputName);
//获得文件的字节数组
byte [] bs = mf.getBytes();
String fileName = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date());
Random random = new Random();
for(int i = 0; i < 3; i++){
fileName = fileName + random.nextInt(10);
}

String oriFileName = mf.getOriginalFilename();
//获得文件的后缀
String suffix = oriFileName.substring(oriFileName.lastIndexOf("."));
//获得上传文件的绝对路径
String realPath = ECPSUtils.readProp("file_path")+"/upload/"+fileName+suffix;
//获得相对路径
String relativePath = "/upload/"+fileName+suffix;
//创建jersy的客户端
Client client = Client.create();
//创建web资源对象
WebResource wr = client.resource(realPath);
//上传
wr.put(bs);
JSONObject jo = new JSONObject();
jo.accumulate("realPath", realPath);
jo.accumulate("relativePath", relativePath);
String result = jo.toString();
System.out.println(result);
out.write(result);
}
}

如果此时报403错误，一般是因为服务器默认为只读，所以需要在tomcat/conf/web.xml中的org.apache.catalina.servlets.DefaultServlet添加如下代码

<init-param>
<param-name>readonly</param-name>
<param-value>false</param-value>
</init-param>