BEAL3771: Cache Headers in Spring MVC

pom.xml

@@ -692,6 +692,7 @@
                 <module>spring-mvc-forms-jsp</module>
                 <module>spring-mvc-forms-thymeleaf</module>
                 <module>spring-mvc-java</module>
+                <module>spring-mvc-java-2</module>
                 <module>spring-mvc-kotlin</module>
 
                 <module>spring-mvc-velocity</module>

spring-mvc-java-2/.gitignore

@@ -0,0 +1,13 @@
+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

spring-mvc-java-2/pom.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>spring-mvc-java-2</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <name>spring-mvc-java-2</name>
+    <packaging>war</packaging>
+    
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-2</relativePath>
+    </parent>
+    
+    <dependencies>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>javax.servlet-api</artifactId>
+            <version>${javax.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-webmvc</artifactId>
+            <version>${spring.mvc.version}</version>
+        </dependency>
+
+    </dependencies>
+    
+    <properties>
+        <javax.version>4.0.1</javax.version>
+        <spring.mvc.version>5.2.2.RELEASE</spring.mvc.version>
+    </properties>
+
+
+    
+</project>

spring-mvc-java-2/src/main/java/com/baeldung/cache/CacheControlController.java

@@ -1,4 +1,4 @@
-package com.baeldung.web.controller;
+package com.baeldung.cache;
 
 import org.springframework.http.CacheControl;
 import org.springframework.http.ResponseEntity;

spring-mvc-java-2/src/main/java/com/baeldung/cache/WebConfig.java

@@ -0,0 +1,41 @@
+package com.baeldung.cache;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.CacheControl;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.mvc.WebContentInterceptor;
+
+import java.util.concurrent.TimeUnit;
+
+@EnableWebMvc
+@Configuration
+@ComponentScan(basePackages = {"com.baeldung.cache"})
+public class WebConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addViewControllers(final ViewControllerRegistry registry) {
+        registry.addViewController("/").setViewName("index");
+    }
+
+    @Override
+    public void addResourceHandlers(final ResourceHandlerRegistry registry) {
+        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/")
+          .setCacheControl(CacheControl.maxAge(60, TimeUnit.SECONDS)
+            .noTransform()
+            .mustRevalidate());
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        WebContentInterceptor interceptor = new WebContentInterceptor();
+        interceptor.addCacheMapping(CacheControl.maxAge(60, TimeUnit.SECONDS)
+          .noTransform()
+          .mustRevalidate(), "/cache/*");
+        registry.addInterceptor(interceptor);
+    }
+}

spring-mvc-java-2/src/test/java/com/baeldung/cache/CacheControlControllerIntegrationTest.java

@@ -1,6 +1,5 @@
-package com.baeldung.web.controller;
+package com.baeldung.cache;
 
-import com.baeldung.spring.web.config.WebConfig;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -16,9 +15,6 @@ import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 import org.springframework.web.context.WebApplicationContext;
 
-import java.time.LocalDate;
-import java.time.LocalDateTime;
-
 import static org.springframework.http.HttpHeaders.IF_UNMODIFIED_SINCE;
 
 @ExtendWith(SpringExtension.class)

spring-mvc-java/src/main/java/com/baeldung/spring/web/config/WebConfig.java

@@ -2,7 +2,6 @@ package com.baeldung.spring.web.config;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.TimeUnit;
 
 import org.springframework.context.MessageSource;
 import org.springframework.context.annotation.Bean;
@@ -10,19 +9,15 @@ import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Description;
 import org.springframework.context.support.ResourceBundleMessageSource;
-import org.springframework.http.CacheControl;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.ByteArrayHttpMessageConverter;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.web.servlet.ViewResolver;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
-import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
-import org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping;
-import org.springframework.web.servlet.mvc.WebContentInterceptor;
 import org.springframework.web.servlet.view.InternalResourceViewResolver;
 import org.springframework.web.servlet.view.JstlView;
 import org.springframework.web.util.UrlPathHelper;
@@ -35,7 +30,7 @@ import com.baeldung.excel.ExcelPOIHelper;
 
 @EnableWebMvc
 @Configuration
-@ComponentScan(basePackages = {"com.baeldung.web.controller"})
+@ComponentScan(basePackages = { "com.baeldung.web.controller" })
 public class WebConfig implements WebMvcConfigurer {
 	
     @Override
@@ -89,10 +84,7 @@ public class WebConfig implements WebMvcConfigurer {
 
     @Override
     public void addResourceHandlers(final ResourceHandlerRegistry registry) {
-        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/")
+        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
-          .setCacheControl(CacheControl.maxAge(60, TimeUnit.SECONDS)
-                             .noTransform()
-                             .mustRevalidate());
     }
 
     @Override
@@ -129,13 +121,4 @@ public class WebConfig implements WebMvcConfigurer {
     public ExcelPOIHelper excelPOIHelper() {
         return new ExcelPOIHelper();
     }
-
-    @Override
-    public void addInterceptors(InterceptorRegistry registry) {
-        WebContentInterceptor interceptor = new WebContentInterceptor();
-        interceptor.addCacheMapping(CacheControl.maxAge(60, TimeUnit.SECONDS)
-                                      .noTransform()
-                                      .mustRevalidate(), "/cache/*");
-        registry.addInterceptor(interceptor);
-    }
 }