try

@@ -13,7 +13,7 @@ public class MessageSenderConstant {
 
     public static String PROJECT_REAL_PATH = "";
 
-    public static final String TEMP_FILE_PATH = "wechatImgFile/";
+    public static final String TEMP_FILE_PATH = "/wechatImgFile/";
 
     public static final String IMG_SUFFIX = ".jpg";
 

@@ -276,7 +276,7 @@ public class WechatServiceImpl implements IWechatService {
 		try {
             //下载网络图片
 			String fileName = String.valueOf(System.currentTimeMillis()) + MessageSenderConstant.IMG_SUFFIX;
-			String pathFile = MessageSenderConstant.PROJECT_REAL_PATH + MessageSenderConstant.TEMP_FILE_PATH + fileName;
+			String pathFile = MessageSenderConstant.PROJECT_REAL_PATH + MessageSenderConstant.TEMP_FILE_PATH + File.separator + fileName;
             HttpClientUtil.downFromPicUrl(customMsgBO.getSendContent(), MessageSenderConstant.PROJECT_REAL_PATH + MessageSenderConstant.TEMP_FILE_PATH, fileName);
             //上传微信 获取 media_id
 			String addMediaUrl = getMediaUrl(accessToken);

@@ -194,7 +194,7 @@ public class HttpClientUtil {
             }
 
         }
-        OutputStream os = new FileOutputStream(sf.getPath() + "\\" + filename);
+        OutputStream os = new FileOutputStream(sf.getPath() + File.separator + filename);
         log.info("file down os is {}",os);
         // 开始读取
         while ((len = is.read(bs)) != -1) {