[SCB-2624] migrate swagger-generator-springmvc to junit5 (#3161)

diff --git a/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/processor/annotation/RequestPartAnnotationProcessorTest.java b/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/processor/annotation/RequestPartAnnotationProcessorTest.java
index 7ad611b..3dd50d0 100644
--- a/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/processor/annotation/RequestPartAnnotationProcessorTest.java
+++ b/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/processor/annotation/RequestPartAnnotationProcessorTest.java
@@ -24,9 +24,9 @@
 import org.apache.servicecomb.swagger.generator.core.model.HttpParameterType;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
-import org.junit.BeforeClass;
-import org.junit.Test;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 import org.springframework.web.bind.annotation.RequestPart;
 import org.springframework.web.multipart.MultipartFile;
 
@@ -39,7 +39,7 @@
 
   private static final RequestPartAnnotationProcessor requestPartAnnotationProcessor = new RequestPartAnnotationProcessor();
 
-  @BeforeClass
+  @BeforeAll
   public static void beforeClass() {
     for (Method method : DemoRest.class.getDeclaredMethods()) {
       if (method.getName().equals("fun")) {
diff --git a/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/property/creator/MultipartFilePropertyCreatorTest.java b/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/property/creator/MultipartFilePropertyCreatorTest.java
index 7027736..1e43c5f 100644
--- a/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/property/creator/MultipartFilePropertyCreatorTest.java
+++ b/swagger/swagger-generator/generator-springmvc/src/test/java/org/apache/servicecomb/swagger/generator/springmvc/property/creator/MultipartFilePropertyCreatorTest.java
@@ -19,7 +19,7 @@
 
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.springframework.web.multipart.MultipartFile;
 
 import io.swagger.models.properties.FileProperty;