prima implementazione di persistence usando eclipselink e database integrato in glassfish.

test3_persistence/test_class.java

@@ -0,0 +1,41 @@
+package test3_persistence;
+
+
+import javax.annotation.PostConstruct;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.NamedQuery;
+
+@Entity
+@NamedQuery(name = "findxg", query = "SELECT b FROM test_class b WHERE b.title ='xg'")
+public class test_class {
+
+        @Id @GeneratedValue
+        private Long id;
+
+        @PostConstruct
+        public void ps (){
+                title = "xg";
+        }
+
+        private String title;
+
+        private Double price;
+
+        public String getTitle() {
+                return title;
+        }
+
+        public void setTitle(String title) {
+                this.title = title;
+        }
+
+        public Double getPrice() {
+                return price;
+        }
+
+        public void setPrice(Double price) {
+                this.price = price;
+        }
+}