#30 jpa basic: jpql - named query

hello-jpa/src/main/java/com/hello/jpa/query/NamedQuery.java

@@ -0,0 +1,65 @@
+package com.hello.jpa.query;
+
+import com.hello.jpa.query.entity.Member;
+import com.hello.jpa.query.entity.Team;
+
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.EntityTransaction;
+import javax.persistence.Persistence;
+import java.util.List;
+
+public class NamedQuery {
+
+    public static void main(String[] args) {
+        EntityManagerFactory emf = Persistence.createEntityManagerFactory("hello");
+
+        EntityManager em = emf.createEntityManager();
+
+        EntityTransaction tx = em.getTransaction();
+        tx.begin();
+
+        try {
+            Team team = new Team();
+            team.setName("team1");
+            em.persist(team);
+
+            Team team2 = new Team();
+            team2.setName("team2");
+            em.persist(team2);
+
+            Member member = new Member();
+            member.setName("member1");
+            member.setTeam(team);
+            em.persist(member);
+
+            Member member2 = new Member();
+            member2.setName("member2");
+            member2.setTeam(team);
+            em.persist(member2);
+
+            Member member3 = new Member();
+            member3.setName("member3");
+            member3.setTeam(team2);
+            em.persist(member3);
+
+            em.flush();
+            em.clear();
+
+            List<Member> result = em.createNamedQuery("Member.findByName", Member.class)
+                    .setParameter("name", "member2")
+                    .getResultList();
+
+            result.forEach(System.out::println);
+
+            tx.commit();
+        } catch (Exception e) {
+            e.printStackTrace();
+            tx.rollback();
+        } finally {
+            em.close();
+        }
+
+        emf.close();
+    }
+}

hello-jpa/src/main/java/com/hello/jpa/query/entity/Member.java

@@ -3,6 +3,10 @@ package com.hello.jpa.query.entity;
 import javax.persistence.*;
 
 @Entity
+@NamedQuery(
+        name = "Member.findByName",
+        query = "select m from Member m where m.name = :name"
+)
 public class Member {
 
     @Id @GeneratedValue