update

mec-education/src/main/java/com/ym/mec/education/controller/SmsCodeController.java

@@ -101,9 +101,8 @@ public class SmsCodeController extends BaseController {
         KaptchaServlet kaptchaServlet = new KaptchaServlet();
         kaptchaServlet.init();
         ServletOutputStream out = response.getOutputStream();
-        // write the data out
-        ImageIO.write(bi, "jpg", out);
         try {
+            ImageIO.write(bi, "jpg", out);
             out.flush();
         } finally {
             out.close();

mec-student/src/main/java/com/ym/mec/student/controller/SmsCodeController.java

@@ -103,8 +103,8 @@ public class SmsCodeController extends BaseController {
         kaptchaServlet.init();
         ServletOutputStream out = response.getOutputStream();
         // write the data out
-        ImageIO.write(bi, "jpg", out);
         try {
+            ImageIO.write(bi, "jpg", out);
             out.flush();
         } finally {
             out.close();

mec-teacher/src/main/java/com/ym/mec/teacher/controller/SmsCodeController.java

@@ -101,9 +101,8 @@ public class SmsCodeController extends BaseController {
         KaptchaServlet kaptchaServlet = new KaptchaServlet();
         kaptchaServlet.init();
         ServletOutputStream out = response.getOutputStream();
-        // write the data out
-        ImageIO.write(bi, "jpg", out);
         try {
+            ImageIO.write(bi, "jpg", out);
             out.flush();
         } finally {
             out.close();