集成JPA
1、在conf/application.conf
db.epay.driver=com.mysql.jdbc.Driver
db.epay.url="jdbc:mysql://localhost:3306/epay"
db.epay.user=root
db.epay.password="1234"
db.epay.jndiName=epayDS
hibernate.use_sql_comments=true
jpa.default=defaultPersistenceUnit
数据库如果不存在,请在数据库中手动新建
2、在project/build.scala
val appDependencies = Seq(
// Add your project dependencies here,
javaCore,
javaJdbc,
javaEbean,
"mysql" % "mysql-connector-java" % "5.1.18",
"org.hibernate" % "hibernate-entitymanager" % "3.6.9.Final",
"play" % "play-java-jpa_2.10" % "2.1.0"
)
3、接下里要创建一个正确的JPA配置文件persistence.xml。把它放进conf/META-INF目录(没有则新建)
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="defaultPersistenceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<non-jta-data-source>epayDS</non-jta-data-source>
<properties>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
</properties>
</persistence-unit>
</persistence>
注解:persistence-unit name就是
application.conf
里的jpa.default值,non-jta-data-source就是db.epay.jndiName。
4、java类
import play.db.jpa.*;
public class UserControl extends Controller {
final static Form<User> userForm = form(User.class);
@Transactional
public static Result register() {
// DataSource ds = DB.getDataSource("epay");
// try {
// System.out.println("conn:"+!ds.getConnection().isClosed());
// } catch (SQLException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
return ok(form.render());
}
方法加个@Transactional。
启动测试看有无错误。