bug fixed

wisenergy-web-admin/src/main/java/cn/wisenergy/web/admin/controller/app/LoginController.java

@@ -29,6 +29,8 @@ import javax.servlet.http.HttpServletRequest;
 import java.awt.image.BufferedImage;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -142,6 +144,7 @@ public class LoginController {
             BufferedImage srcImage = ImageIO.read(is);
 
             QrConfig config = new QrConfig(130, 130);
+            config.setCharset(StandardCharsets.UTF_8);
             config.setMargin(0);
             BufferedImage waterImage = QrCodeUtil.generate(regFullUrl,config);
             byte[] bytes = ImageUtil.watermarkImageSimple1(srcImage, waterImage);