Merge pull request #2046 from JamesZBL/patch-1

下载图片添加连接和读取的超时设置

src/main/java/com/alibaba/excel/converters/url/UrlImageConverter.java

@@ -3,6 +3,7 @@ package com.alibaba.excel.converters.url;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
+import java.net.URLConnection;
 
 import com.alibaba.excel.converters.Converter;
 import com.alibaba.excel.metadata.GlobalConfiguration;
@@ -27,7 +28,10 @@ public class UrlImageConverter implements Converter<URL> {
         GlobalConfiguration globalConfiguration) throws IOException {
         InputStream inputStream = null;
         try {
-            inputStream = value.openStream();
+            URLConnection conn = value.openConnection();
+            conn.setConnectTimeout(1000);
+            conn.setReadTimeout(5000);
+            inputStream = con.getInputStream();
             byte[] bytes = IoUtils.toByteArray(inputStream);    
             return new WriteCellData<>(bytes);
         } finally {