spring data jpa : query creation

spring-data-jpa/src/main/java/com/example/springdatajpa/entity/Member.java

@@ -32,6 +32,11 @@ public class Member {
         }
     }
 
+    public Member(String username, int age) {
+        this.username = username;
+        this.age = age;
+    }
+
     public void changeTeam(Team team) {
         this.team = team;
         team.getMembers().add(this);

spring-data-jpa/src/main/java/com/example/springdatajpa/repository/MemberJpaRepository.java

@@ -41,4 +41,11 @@ public class MemberJpaRepository {
     public Member find(Long id) {
         return em.find(Member.class, id);
     }
+
+    public List<Member> findByUsernameAndAgeGreaterThan(String username, int age) {
+        return em.createQuery("select m from Member m where m.username = :username and m.age > :age", Member.class)
+                .setParameter("username", username)
+                .setParameter("age", age)
+                .getResultList();
+    }
 }

spring-data-jpa/src/main/java/com/example/springdatajpa/repository/MemberRepository.java

@@ -3,5 +3,9 @@ package com.example.springdatajpa.repository;
 import com.example.springdatajpa.entity.Member;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
+
 public interface MemberRepository extends JpaRepository<Member, Long> {
+
+    List<Member> findByUsernameAndAgeGreaterThan(String username, int age);
 }

spring-data-jpa/src/test/java/com/example/springdatajpa/repository/MemberJpaRepositoryTest.java

@@ -58,4 +58,18 @@ class MemberJpaRepositoryTest {
         long deleteCount = memberJpaRepository.count();
         assertEquals(0, deleteCount);
     }
+
+    @Test
+    void findByUsernameAndAgeGreaterThen() {
+        Member m1 = new Member("aaa", 10);
+        Member m2 = new Member("aaa", 20);
+        memberJpaRepository.save(m1);
+        memberJpaRepository.save(m2);
+
+        List<Member> result = memberJpaRepository.findByUsernameAndAgeGreaterThan("aaa", 15);
+
+        assertEquals("aaa", result.get(0).getUsername());
+        assertEquals(20, result.get(0).getAge());
+        assertEquals(1, result.size());
+    }
 }

spring-data-jpa/src/test/java/com/example/springdatajpa/repository/MemberRepositoryTest.java

@@ -58,4 +58,18 @@ public class MemberRepositoryTest {
         long deleteCount = memberRepository.count();
         assertEquals(0, deleteCount);
     }
+
+    @Test
+    void findByUsernameAndAgeGreaterThen() {
+        Member m1 = new Member("aaa", 10);
+        Member m2 = new Member("aaa", 20);
+        memberRepository.save(m1);
+        memberRepository.save(m2);
+
+        List<Member> result = memberRepository.findByUsernameAndAgeGreaterThan("aaa", 15);
+
+        assertEquals("aaa", result.get(0).getUsername());
+        assertEquals(20, result.get(0).getAge());
+        assertEquals(1, result.size());
+    }
 }