我对休眠查询有疑问。
更新：当我使用这个查询时，它就像一个魅力：
public static List<Korisnik> UzmiSveKorisnike()
{
EntityManager em = Konekcija.getEmf().createEntityManager();
TypedQuery<Korisnik> q = em.createQuery("select k from Korisnik k where k.isActive = 1", Korisnik.class);
List<Korisnik> resultList = q.getResultList();
em.close();
return resultList;
}
但是当我使用下面列出的一个时，选择单个结果（比如登录）......
我收到此错误：警告：SQL 错误：1064，SQLState：42000
我尝试了多种方法来实现这个查询，但都没有成功。我将在帖子末尾列出它们。
这是代码：
public static Korisnik ProvjeraKorisnickihPodataka(String kIme, String kLozinka)
{
EntityManager em = Konekcija.getEmf().createEntityManager();
{
TypedQuery<Korisnik> q = em.createQuery("select k from Korisnik k where k.isActive = 1 AND k.korisnickoIme=:ime AND k.lozinka =:lozinka", Korisnik.class);
q.setParameter("ime", kIme);
q.setParameter("lozinka", kLozinka);
Korisnik provjeren = q.getSingleResult();
em.close();
return provjeren;
即使我将 :ime 和 :lozinka 替换为“k.korisnickoIme='msbtest' 和 k.lozinka = 'msbtest'”之类的实际数据，我也会遇到同样的错误。
感谢您的帮助。
谢谢！
完整的堆栈：
Hibernate: select TOP(?) korisnik0_.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, korisnik0_.ime as ime11_, korisnik0_.isActive as isActive11_, korisnik0_.kontakt as kontakt11_, korisnik0_.korisnickoIme as korisnic5_11_, korisnik0_.lozinka as lozinka11_, korisnik0_.prezime as prezime11_, korisnik0_.rola_RolaID as rola9_11_ from Korisnik korisnik0_ where korisnik0_.isActive=1 and korisnik0_.korisnickoIme=? and korisnik0_.lozinka=?
Jul 05, 2013 11:45:22 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1064, SQLState: 42000
Jul 05, 2013 11:45:22 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1377)
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1300)
at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:318)
at Servis.LoginServis.ProvjeraKorisnickihPodataka(LoginServis.java:35)
at UI.LogInFrm.do_btnPrijava_widgetSelected(LogInFrm.java:173)
at UI.LogInFrm$1.widgetSelected(LogInFrm.java:121)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at UI.LogInFrm.main(LogInFrm.java:44)
Caused by: org.hibernate.exception.SQLGrammarException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:82)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110)
at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:129)
at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81)
at com.sun.proxy.$Proxy10.executeQuery(Unknown Source)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1926)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1727)
at org.hibernate.loader.Loader.doQuery(Loader.java:852)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:293)
at org.hibernate.loader.Loader.doList(Loader.java:2411)
at org.hibernate.loader.Loader.doList(Loader.java:2397)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2227)
at org.hibernate.loader.Loader.list(Loader.java:2222)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1247)
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:285)
... 9 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1053)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2322)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:122)
... 25 more
映射是这样的：
/**
** Class Korisnik
**/
@Entity
public class Korisnik implements Serializable {
//Fields
@Id
@GeneratedValue
private Integer KorisnikID;
private String ime;
private String prezime;
private String kontakt;
private String korisnickoIme;
private String lozinka;
private Boolean isActive;
@JoinColumn(nullable = false)
@ManyToOne
private Agencija agencija;
@JoinColumn(nullable = false)
@ManyToOne
private Rola rola;
getter 和 setter 去...
好的，我的 persistence.xml 文件如下所示：
<?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" version="2.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="MojaOznaka1" transaction-type="RESOURCE_LOCAL">
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<!-- Podaci o bazi podataka -->
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://xxxxxxxxx.xxxxxxxxx.xxx/xxxxxxxxx/" />
<property name="javax.persistence.jdbc.user" value="xxxxxx" />
<property name="javax.persistence.jdbc.password" value="xxxxxx" />
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<!-- hiberante dialect -->
<property name="hibernate.dialect" value="org.hibernate.dialect.SQLServer2008Dialect" />
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size" value="1" />
<!-- Ispis SQL koda u konzolu -->
<property name="hibernate.show_sql" value="true" />
<!-- formatiranje SQL koda ispisanog u konzolni prozor -->
<property name="hibernate.format_sql" value="false" />
<!-- Vrijednost "update" kreira tabele ako nepostoje -->
<!-- <property name="hibernate.hbm2ddl.auto" value="update" /> -->
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class" value="thread" />
<!-- Disable the second-level cache -->
<property name="cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />
<!-- automatsko prepoznavanje JPA klasa -->
<property name="hibernate.archive.autodetection" value="class, hbm" />
</properties>
</persistence-unit>
</persistence>
好的，现在呢？？？