Merge pull request #9907 from tarunjain01/master

BAEL-4404

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/charencoding/CharacterEncodingDemo.java

@@ -0,0 +1,27 @@
+package com.baeldung.charencoding;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.filter.CharacterEncodingFilter;
+
+@SpringBootApplication
+public class CharacterEncodingDemo {
+
+    public static void main(String[] args) {
+        SpringApplication.run(CharacterEncodingDemo.class, args);
+    }
+
+    @Bean
+    public FilterRegistrationBean filterRegistrationBean() {
+        CharacterEncodingFilter filter = new CharacterEncodingFilter();
+        filter.setEncoding("UTF-8");
+        filter.setForceEncoding(true);
+
+        FilterRegistrationBean registrationBean = new FilterRegistrationBean();
+        registrationBean.setFilter(filter);
+        registrationBean.addUrlPatterns("/*");
+        return registrationBean;
+    }
+}

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/charencoding/controller/CharEncodingCheckController.java

@@ -0,0 +1,13 @@
+package com.baeldung.charencoding.controller;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class CharEncodingCheckController {
+
+    @GetMapping("/ping")
+    public String ping() {
+        return "path";
+    }
+}

spring-boot-modules/spring-boot-mvc-3/src/test/java/com/baeldung/charencoding/controller/CharEncodingCheckControllerUnitTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.charencoding.controller;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+import java.io.IOException;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.web.filter.CharacterEncodingFilter;
+
+class CharEncodingCheckControllerUnitTest {
+
+    @Test
+    void whenCharEncodingFilter_thenVerifyEncoding() throws ServletException, IOException {
+        HttpServletRequest request = mock(HttpServletRequest.class);
+        HttpServletResponse response = mock(HttpServletResponse.class);
+        FilterChain chain = mock(FilterChain.class);
+        
+        CharacterEncodingFilter filter = new CharacterEncodingFilter();
+        filter.setEncoding("UTF-8");
+        filter.setForceEncoding(true);
+        
+        filter.doFilter(request, response, chain);
+        
+        verify(request).setCharacterEncoding("UTF-8");
+        verify(response).setCharacterEncoding("UTF-8");
+    }
+
+}