fix MybatisExampleHelper bug

service/src/main/java/com/haomostudio/SeekTruthBackend/service/HmUtils/MybatisExampleHelper.java

@@ -114,8 +114,7 @@ public class MybatisExampleHelper {
                         m.invoke(exampleObjCriteria,
                                 Tools.convertStringToDate((String)value, "yyyy-MM-dd HH:mm:ss"));
                     } else if(m.getParameterTypes()[0].getName().contains("Long")){
-                        m.invoke(exampleObjCriteria, Long.valueOf((String)value));
-
+                        m.invoke(exampleObjCriteria, Long.valueOf(String.valueOf(value)));
                     } else if(m.getParameterTypes()[0].getName().contains("Integer")){
                         m.invoke(exampleObjCriteria, Integer.valueOf((String)value));