sync source code with article

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

@@ -0,0 +1,32 @@
+package com.baeldung.spring.web.config;
+
+import javax.servlet.MultipartConfigElement;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRegistration;
+
+import org.springframework.web.WebApplicationInitializer;
+import org.springframework.web.context.support.GenericWebApplicationContext;
+import org.springframework.web.servlet.DispatcherServlet;
+
+public class MainWebAppInitializer implements WebApplicationInitializer {
+
+    private String TMP_FOLDER = "/tmp"; 
+    private int MAX_UPLOAD_SIZE = 5 * 1024 * 1024;
+    
+    @Override
+    public void onStartup(ServletContext sc) throws ServletException {
+
+        ServletRegistration.Dynamic appServlet = sc.addServlet("mvc", new DispatcherServlet(
+            new GenericWebApplicationContext()));
+
+        appServlet.setLoadOnStartup(1);
+
+        MultipartConfigElement multipartConfigElement = new MultipartConfigElement(TMP_FOLDER, 
+            MAX_UPLOAD_SIZE, MAX_UPLOAD_SIZE * 2, MAX_UPLOAD_SIZE / 2);
+
+        appServlet.setMultipartConfig(multipartConfigElement);
+
+    }
+
+}

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

@@ -12,6 +12,7 @@ import org.springframework.context.support.ResourceBundleMessageSource;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.ByteArrayHttpMessageConverter;
 import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.web.multipart.commons.CommonsMultipartResolver;
 import org.springframework.web.servlet.ViewResolver;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
@@ -121,4 +122,11 @@ public class WebConfig implements WebMvcConfigurer {
     public ExcelPOIHelper excelPOIHelper() {
         return new ExcelPOIHelper();
     }
+    
+    @Bean(name = "multipartResolver")
+    public CommonsMultipartResolver multipartResolver() {
+        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
+        multipartResolver.setMaxUploadSize(100000);
+        return multipartResolver;
+    }
 }