[ISSUE #60]Update SpringBoot version. (#61)

pom.xml

@@ -96,12 +96,13 @@
         <lombok.version>1.18.12</lombok.version>
         <main.basedir>${basedir}/../..</main.basedir>
         <docker.image.prefix>apacherocketmq</docker.image.prefix>
-        <spring.boot.version>2.2.2.RELEASE</spring.boot.version>
+        <spring.boot.version>2.6.0</spring.boot.version>
         <mockito-inline.version>3.3.3</mockito-inline.version>
         <jaxb-api.version>2.3.1</jaxb-api.version>
         <commons-pool2.version>2.4.3</commons-pool2.version>
         <easyexcel.version>2.2.10</easyexcel.version>
         <asm.version>4.2</asm.version>
+        <junit.version>4.12</junit.version>
     </properties>
 
     <dependencies>
@@ -125,6 +126,17 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <version>${spring.boot.version}</version>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.mockito</groupId>
+                    <artifactId>mockito-core</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+            <version>${spring.boot.version}</version>
         </dependency>
         <dependency>
             <groupId>commons-collections</groupId>
@@ -246,6 +258,12 @@
             <artifactId>asm</artifactId>
             <version>${asm.version}</version>
         </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
 
     </dependencies>
     <build>

src/test/java/org/apache/rocketmq/dashboard/controller/DlqMessageControllerTest.java

@@ -132,7 +132,7 @@ public class DlqMessageControllerTest extends BaseControllerTest {
         // 2、export dlqMessage success
         perform = mockMvc.perform(requestBuilder);
         perform.andExpect(status().is(200))
-            .andExpect(content().contentType("application/vnd.ms-excel"));
+            .andExpect(content().contentType("application/vnd.ms-excel;charset=utf-8"));
 
     }
 
@@ -169,7 +169,7 @@ public class DlqMessageControllerTest extends BaseControllerTest {
         requestBuilder.content(JSON.toJSONString(dlqMessages));
         perform = mockMvc.perform(requestBuilder);
         perform.andExpect(status().is(200))
-            .andExpect(content().contentType("application/vnd.ms-excel"));
+            .andExpect(content().contentType("application/vnd.ms-excel;charset=utf-8"));
     }
 
     @Override protected Object getTestController() {