JAVA-31190: Preparation for migrating spring-boot-modules to version 3. (#15834)

spring-boot-modules/spring-boot-basic-customization-2/pom.xml

@@ -9,10 +9,9 @@
     <description>Module For Spring Boot Basic Customization 2</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-3</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3</relativePath>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-basic-customization-2/src/main/java/com/baeldung/dispatchservlet/conf/WebConf.java

@@ -1,12 +1,13 @@
 package com.baeldung.dispatchservlet.conf;
 
-import com.baeldung.dispatchservlet.listener.CustomListener;
-import com.baeldung.dispatchservlet.servlet.CustomServlet;
 import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
 import org.springframework.boot.web.servlet.ServletRegistrationBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
+import com.baeldung.dispatchservlet.listener.CustomListener;
+import com.baeldung.dispatchservlet.servlet.CustomServlet;
+
 import jakarta.servlet.ServletContextListener;
 
 @Configuration

spring-boot-modules/spring-boot-basic-customization-2/src/main/java/com/baeldung/dispatchservlet/filter/CustomFilter.java

@@ -1,11 +1,17 @@
 package com.baeldung.dispatchservlet.filter;
 
+import java.io.IOException;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Component;
 
-import jakarta.servlet.*;
-import java.io.IOException;
+import jakarta.servlet.Filter;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.FilterConfig;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.ServletRequest;
+import jakarta.servlet.ServletResponse;
 
 @Component
 public class CustomFilter implements Filter {
@@ -13,7 +19,7 @@ public class CustomFilter implements Filter {
     Logger logger = LoggerFactory.getLogger(CustomFilter.class);
 
     @Override
-    public void init(FilterConfig filterConfig) throws ServletException {
+    public void init(FilterConfig filterConfig) {
 
     }
 

spring-boot-modules/spring-boot-basic-customization-2/src/main/java/com/baeldung/dispatchservlet/servlet/CustomServlet.java

@@ -1,15 +1,14 @@
 package com.baeldung.dispatchservlet.servlet;
 
-import com.baeldung.dispatchservlet.filter.CustomFilter;
+import java.io.IOException;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import jakarta.servlet.ServletException;
-import jakarta.servlet.annotation.WebServlet;
 import jakarta.servlet.http.HttpServlet;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
-import java.io.IOException;
 
 public class CustomServlet extends HttpServlet {
 

spring-boot-modules/spring-boot-basic-customization-2/src/main/java/com/baeldung/onceperrequestfilter/AuthenticationFilter.java

@@ -1,5 +1,7 @@
 package com.baeldung.onceperrequestfilter;
 
+import java.io.IOException;
+
 import org.springframework.stereotype.Component;
 import org.springframework.web.filter.OncePerRequestFilter;
 
@@ -7,7 +9,6 @@ import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
-import java.io.IOException;
 
 @Component
 public class AuthenticationFilter extends OncePerRequestFilter {

spring-boot-modules/spring-boot-basic-customization-2/src/main/java/com/baeldung/onceperrequestfilter/HelloController.java

@@ -1,5 +1,8 @@
 package com.baeldung.onceperrequestfilter;
 
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Controller;
@@ -7,8 +10,6 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.context.request.async.DeferredResult;
 
 import jakarta.servlet.http.HttpServletResponse;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
 
 @Controller
 public class HelloController implements AutoCloseable {
@@ -18,7 +19,7 @@ public class HelloController implements AutoCloseable {
     private Logger logger = LoggerFactory.getLogger(HelloController.class);
 
     @GetMapping(path = "/greeting")
-    public DeferredResult<String> hello(HttpServletResponse response) throws Exception {
+    public DeferredResult<String> hello(HttpServletResponse response) {
         DeferredResult<String> deferredResult = new DeferredResult<>();
         executorService.submit(() -> perform(deferredResult));
         return deferredResult;

spring-boot-modules/spring-boot-basic-customization-2/src/main/java/com/baeldung/onceperrequestfilter/MyOncePerRequestFilter.java

@@ -1,5 +1,7 @@
 package com.baeldung.onceperrequestfilter;
 
+import java.io.IOException;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Component;
@@ -9,7 +11,6 @@ import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
-import java.io.IOException;
 
 @Component
 public class MyOncePerRequestFilter extends OncePerRequestFilter {