学生端增加获取分部列表

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

@@ -164,7 +164,7 @@ public class StudentOrderController extends BaseController {
 
         String originalStr = JSONObject.toJSONString(signParams);
         String mewSign = DigestUtils.md5DigestAsHex(originalStr.getBytes());
-        if (mewSign.equals(sign)) {
+        if (!mewSign.equals(sign)) {
             return failed("请勿非法请求");
         }