Merge pull request #21 from bsmahi/main

Upgrade to Spring Boot 4.0.x and Java 25

Author: in28minutes

02.restful-web-services/01-step-by-step-changes/v2.md

@@ -54,7 +54,7 @@ On start.spring.io, Choose
 - groupId: `com.in28minutes.rest.webservices`
 - artifactId: `restful-web-services`
 - package: `com.in28minutes.rest.webservices.restfulwebservices`
-- Dependencies: Spring Boot Starter Web, DevTools, JPA and H2
+- Dependencies: Spring Web, DevTools, JPA and H2
 
 
 ## Step 03
@@ -1230,6 +1230,28 @@ URLs
 	private LocalDate birthDate;
 
 ```
+> [!NOTE]
+MappingJacksonValue will be eliminated in an upcoming release of the Spring Framework. For further information:
+- https://spring.io/blog/2025/10/07/introducing-jackson-3-support-in-spring#goodbye-mappingjacksonvalue
+- https://github.com/danvega/donut-shop/blob/master/README.md
+
+### /src/main/java/com/in28minutes/rest/webservices/restfulwebservices/filtering/Views.java New
+
+```java
+package com.in28minutes.rest.webservices.restfulwebservices.filtering;
+
+/**
+ *  <a href="https://spring.io/blog/2025/10/07/introducing-jackson-3-support-in-spring">Jackson 3 Support in Spring 4</a>
+ */
+public class Views {
+
+    public interface Public {
+    }
+
+    public interface Internal extends Public {
+    }
+}
+```
 
 ### /src/main/java/com/in28minutes/rest/webservices/restfulwebservices/filtering/FilteringController.java New
 
@@ -1239,72 +1261,88 @@ package com.in28minutes.rest.webservices.restfulwebservices.filtering;
 import java.util.Arrays;
 import java.util.List;
 
-import org.springframework.http.converter.json.MappingJacksonValue;
+import com.fasterxml.jackson.annotation.JsonView;
+// import org.springframework.http.converter.json.MappingJacksonValue;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
+import tools.jackson.databind.json.JsonMapper;
+import tools.jackson.databind.ser.FilterProvider;
+import tools.jackson.databind.ser.std.SimpleBeanPropertyFilter;
+import tools.jackson.databind.ser.std.SimpleFilterProvider;
 
-import com.fasterxml.jackson.databind.ser.FilterProvider;
-import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
-import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;
+// BEFORE SPRING BOOT 4
+// import com.fasterxml.jackson.databind.ser.FilterProvider;
+// import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
+// import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;
 
 @RestController
 public class FilteringController {
-	
-	@GetMapping("/filtering") //field2
-	public MappingJacksonValue filtering() {
-		
-		SomeBean someBean = new SomeBean("value1","value2", "value3");
 
-		MappingJacksonValue mappingJacksonValue = new MappingJacksonValue(someBean);
-		
-		SimpleBeanPropertyFilter filter = 
-				SimpleBeanPropertyFilter.filterOutAllExcept("field1","field3");
-		
-		FilterProvider filters = 
-				new SimpleFilterProvider().addFilter("SomeBeanFilter", filter );
-		
-		mappingJacksonValue.setFilters(filters );
-		
-		
-		return mappingJacksonValue;
-	}
+    @GetMapping("/filtering") //field2
+    @JsonView(Views.Public.class)
+    public String filtering() {
 
-	@GetMapping("/filtering-list") //field2, field3
-	public MappingJacksonValue filteringList() {
-		List<SomeBean> list = Arrays.asList(new SomeBean("value1","value2", "value3"),
-				new SomeBean("value4","value5", "value6"));
-		MappingJacksonValue mappingJacksonValue = new MappingJacksonValue(list);
-		
-		SimpleBeanPropertyFilter filter = 
-				SimpleBeanPropertyFilter.filterOutAllExcept("field2","field3");
-		
-		FilterProvider filters = 
-				new SimpleFilterProvider().addFilter("SomeBeanFilter", filter );
-		
-		mappingJacksonValue.setFilters(filters );
-		
-		
-		return mappingJacksonValue;
-	}
+        // SomeBean someBean = new SomeBean("value1","value2", "value3");
+        var someBean = new SomeBean("value1","value2", "value3");
+
+        // MappingJacksonValue mappingJacksonValue = new MappingJacksonValue(someBean);
+        // 	SimpleBeanPropertyFilter filter =
+        //				SimpleBeanPropertyFilter.filterOutAllExcept("field1","field3");
+        var filter = SimpleBeanPropertyFilter.filterOutAllExcept("field1","field3");
+
+        // FilterProvider filters =
+        //				new SimpleFilterProvider().addFilter("SomeBeanFilter", filter );
+        var filters = new SimpleFilterProvider().addFilter("SomeBeanFilter", filter);
+
+        var jsonMapper = JsonMapper.builder().build();
+
+        // mappingJacksonValue.setFilters(filters );
+        // return mappingJacksonValue
+        return jsonMapper.writer(filters).writeValueAsString(someBean);
+    }
+
+    @GetMapping("/filtering-list") //field2, field3
+    public String filteringList() {
+        List<SomeBean> list = Arrays.asList(new SomeBean("value1","value2", "value3"),
+                new SomeBean("value4","value5", "value6"));
+        // MappingJacksonValue mappingJacksonValue = new MappingJacksonValue(list);
+
+        // SimpleBeanPropertyFilter filter =
+        //		SimpleBeanPropertyFilter.filterOutAllExcept("field2","field3");
+        var filter = SimpleBeanPropertyFilter.filterOutAllExcept("field2", "field3");
+
+        // FilterProvider filters =
+        //		new SimpleFilterProvider().addFilter("SomeBeanFilter", filter );
+        var filters = new SimpleFilterProvider().addFilter("SomeBeanFilter", filter);
+
+        // mappingJacksonValue.setFilters(filters );
+        var jsonMapper = JsonMapper.builder().build();
+
+        // return mappingJacksonValue;
+        return jsonMapper.writer(filters).writeValueAsString(list);
+    }
 
 }
 ```
 
-
 ### /src/main/java/com/in28minutes/rest/webservices/restfulwebservices/filtering/SomeBean.java New
 
 ```java
 package com.in28minutes.rest.webservices.restfulwebservices.filtering;
 
 import com.fasterxml.jackson.annotation.JsonFilter;
+import com.fasterxml.jackson.annotation.JsonView;
 
 //@JsonIgnoreProperties({"field1","field2"})
 @JsonFilter("SomeBeanFilter")
 public class SomeBean {
-	private String field1;
-	
+    @JsonView(Views.Public.class)
+    private String field1;
+
+    @JsonView(Views.Public.class)
 	private String field2;
 
+    @JsonView(Views.Public.class)
 	//@JsonIgnore
 	private String field3;
 
@@ -1373,6 +1411,17 @@ management.endpoints.web.exposure.include=*
 - Step 28 - Creating User Entity and some test data
 - Step 29 - Enhancing REST API to connect to H2 using JPA and Hibernate
 
+### pom.xml - New
+
+- To view the H2 console in the web browser, you need to manually add the following dependency to the `pom.xml` file.
+
+```xml
+<dependency>
+    <groupId>org.springframework.boot</groupId>
+    <artifactId>spring-boot-h2console</artifactId>
+</dependency>
+```
+
 URLs
 - H2-Console
 	- http://localhost:8080/h2-console
@@ -1813,7 +1862,11 @@ select * from post;
 ### /pom.xml Modified
 
 ```
-		<!-- 
+		<!--
+		<dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-h2console</artifactId>
+        </dependency> 
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>