java - Not able to display entire table in hibernate 5.1.x -


i trying create simple hostel management system using hibernate 5.1 , mysql database. not able display entire table (all rows ) table hostelhome of following piece of code. able display single row entire table not want.

public static void display(){             sessionfactory sessionfactory = new configuration().configure().buildsessionfactory();             session session = sessionfactory.opensession();             try{                  hostelhome h1 = (hostelhome)session.get(hostelhome.class, new integer(1));                 system.out.print("room number: "+h1.getroom_no()+" ");                 system.out.print("vacancy: "+h1.getvacancy()+" ");                  session.close();             }catch(exception e){                     e.printstacktrace();             }          }

my hibernate config file 

<?xml version="1.0"?> <!doctype hibernate-configuration public "-//hibernate/hibernate configuration dtd 3.0//en"                                          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration>  <session-factory name="">   <!-- database connection settings -->   <property name="connection.driver_class">com.mysql.jdbc.driver</property>   <property name="connection.url">jdbc:mysql://localhost:3306/test</property>   <property name="connection.username">root</property>   <property name="connection.password">root</property>   <!-- jdbc connection pool (use built-in) -->   <property name="connection.pool_size">1</property>   <!-- sql dialect -->   <property name="dialect">org.hibernate.dialect.mysqldialect</property>   <!-- enable hibernate's automatic session context management -->   <property name="current_session_context_class">thread</property>   <!-- disable second-level cache  -->   <property name="cache.provider_class">org.hibernate.cache.internal.nocacheprovider</property>   <!-- echo executed sql stdout -->   <property name="show_sql">true</property>   <!-- drop , re-create database schema on startup create deletes prev records/ update updates table without deleting it-->   <property name="hbm2ddl.auto">update</property>   <mapping class="hostelhibernate.hostelhome"/>  </session-factory> </hibernate-configuration>

my output :

org.hibernate.engine.jndi.jndiexception: error parsing jndi name []     @ org.hibernate.engine.jndi.internal.jndiserviceimpl.parsename(jndiserviceimpl.java:124)     @ org.hibernate.engine.jndi.internal.jndiserviceimpl.bind(jndiserviceimpl.java:140)     @ org.hibernate.internal.sessionfactoryregistry.addsessionfactory(sessionfactoryregistry.java:88)     @ org.hibernate.internal.sessionfactoryimpl.<init>(sessionfactoryimpl.java:522)     @ org.hibernate.boot.internal.sessionfactorybuilderimpl.build(sessionfactorybuilderimpl.java:465)     @ org.hibernate.cfg.configuration.buildsessionfactory(configuration.java:708)     @ org.hibernate.cfg.configuration.buildsessionfactory(configuration.java:724)     @ hostelhibernate.hostelhome.display(hostelhome.java:75)     @ hostelhibernate.hostelhome.main(hostelhome.java:62) caused by: javax.naming.noinitialcontextexception: need specify class name in environment or system property, or applet parameter, or in application resource file:  java.naming.factory.initial     @ javax.naming.spi.namingmanager.getinitialcontext(namingmanager.java:662)     @ javax.naming.initialcontext.getdefaultinitctx(initialcontext.java:313)     @ javax.naming.initialcontext.geturlordefaultinitctx(initialcontext.java:350)     @ javax.naming.initialcontext.getnameparser(initialcontext.java:505)     @ org.hibernate.engine.jndi.internal.jndiserviceimpl.parsename(jndiserviceimpl.java:118)     ... 8 more  hibernate:      select         hostelhome0_.room_no room_no1_0_0_,         hostelhome0_.vacancy vacancy2_0_0_              hostel hostelhome0_              hostelhome0_.room_no=? room number: 1 vacancy: 2 jun 01, 2016 5:33:27 pm org.hibernate.engine.internal.statisticalloggingsessioneventlistener end info: session metrics {     763136 nanoseconds spent acquiring 1 jdbc connections;     0 nanoseconds spent releasing 0 jdbc connections;     18852614 nanoseconds spent preparing 1 jdbc statements;     967203 nanoseconds spent executing 1 jdbc statements;     0 nanoseconds spent executing 0 jdbc batches;     0 nanoseconds spent performing 0 l2c puts;     0 nanoseconds spent performing 0 l2c hits;     0 nanoseconds spent performing 0 l2c misses;     0 nanoseconds spent executing 0 flushes (flushing total of 0 entities , 0 collections);     0 nanoseconds spent executing 0 partial-flushes (flushing total of 0 entities , 0 collections) }

what expect happen :-)

you query not hostelhome 1 (the 1 key == 1). object returned. asked for.

try 

list<hostelhome> hostels = (list<hostelhome>)session.createquery("select hostelhome").list();

and iterate on resulting list.

see hibernate session documentation , query functions described within: https://docs.jboss.org/hibernate/orm/5.1/javadocs/org/hibernate/session.html


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