BAEL-9092

Fixing Bean Creation Issues with MapStruct’s @Mapper Annotation in Spring Applications

Author: umara-123

mapstruct-3/src/main/java/com/baeldung/fixingbeancreationissues/dto/PersonDto.java

@@ -0,0 +1,19 @@
+package com.baeldung.fixingbeancreationissues.dto;
+
+public class PersonDto {
+    private String name;
+    private int age;
+
+    public PersonDto() {}
+
+    public PersonDto(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+
+    public int getAge() { return age; }
+    public void setAge(int age) { this.age = age; }
+}

mapstruct-3/src/main/java/com/baeldung/fixingbeancreationissues/mapper/PersonMapper.java

@@ -0,0 +1,12 @@
+package com.baeldung.fixingbeancreationissues.mapper;
+
+import org.mapstruct.Mapper;
+import com.baeldung.fixingbeancreationissues.model.Person;
+import com.baeldung.fixingbeancreationissues.dto.PersonDto;
+
+// @Mapper {Incorrect}
+//@Mapper(componentModel = "spring") {Correct}
+public interface PersonMapper {
+    PersonDto toDto(Person person);
+    Person toEntity(PersonDto dto);
+}

mapstruct-3/src/main/java/com/baeldung/fixingbeancreationissues/model/Person.java

@@ -0,0 +1,19 @@
+package com.baeldung.fixingbeancreationissues.model;
+
+public class Person {
+    private String name;
+    private int age;
+
+    public Person() {}
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+
+    public int getAge() { return age; }
+    public void setAge(int age) { this.age = age; }
+}

mapstruct-3/src/main/java/com/baeldung/fixingbeancreationissues/service/PersonService.java

@@ -0,0 +1,24 @@
+package com.baeldung.fixingbeancreationissues.service;
+import com.baeldung.fixingbeancreationissues.dto.PersonDto;
+import com.baeldung.fixingbeancreationissues.mapper.PersonMapper;       
+import com.baeldung.fixingbeancreationissues.model.Person;
+
+
+//@Service 
+
+public class PersonService {
+
+    private final PersonMapper personMapper;
+
+    public PersonService(PersonMapper personMapper) {
+        this.personMapper = personMapper;
+    }
+
+    public PersonDto convertToDto(Person person) {
+        return personMapper.toDto(person);
+    }
+
+    public Person convertToEntity(PersonDto dto) {
+        return personMapper.toEntity(dto);
+    }
+}