Hallo!
Ich versuche gerade meine erste Anwendung mit Hibernate zum Laufen zu
bekommen. Es gibt eigentlich nur 2 Tables. In der Ersten wird nur eine
ID und ein TEXT gespeichert. In der Zweiten werden mehrere Daten zu
den in der ersten Table erstellten Einträgen gespeichert:
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="alisha.Month" table="MONTH">
<id name="id" column="ID">
<generator class="native"/>
</id>
<property name="text" column="TEXT" type="string"/>
</class>
</hibernate-mapping>
Code:
package alisha;
public class Month {
private int id;
private String text;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
}
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="alisha.BookingRow" table="BOOKINGROW">
<id name="id" column="ID">
<generator class="native"/>
</id>
<many-to-one name="idMonth" column="ID_MONTH"
class="alisha.Month"/>
<property name="date" column="DATE" type="date"/>
<property name="text" column="TEXT" type="string"/>
<property name="proceeds" column="PROCEEDS" type="double"/>
<property name="expenditure" column="EXPENDITURE"
type="double"/>
<property name="preTax" column="PRETAX" type="double"/>
<property name="salesTax" column="SALESTAX" type="double"/>
</class>
</hibernate-mapping>
Code:
package alisha;
import java.util.Date;
public class BookingRow {
private int id;
private int idMonth;
private Date date;
private String text;
private double proceeds;
private double expenditure;
private double preTax;
private double salesTax;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getIdMonth() {
return idMonth;
}
public void setIdMonth(int idMonth) {
this.idMonth = idMonth;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public double getProceeds() {
return proceeds;
}
public void setProceeds(double proceeds) {
this.proceeds = proceeds;
}
public double getExpenditure() {
return expenditure;
}
public void setExpenditure(double expenditure) {
this.expenditure = expenditure;
}
public double getPreTax() {
return preTax;
}
public void setPreTax(double preTax) {
this.preTax = preTax;
}
public double getSalesTax() {
return salesTax;
}
public void setSalesTax(double salesTax) {
this.salesTax = salesTax;
}
}
Wenn ich nun versuche Daten in die erste Tabelle zu schreiben, dann
funktioniert das problemlos. Ich habe das Ergebnis auch mit einem
SQL-Client geprüft.
Wenn ich nun aber versuche Daten in die zweite Tabelle zu schreiben,
dann kommt folgende Ausgabe:
***
init:
deps-jar:
compile:
run:
INFO - Hibernate 3.2.5
INFO - hibernate.properties not found
INFO - Bytecode provider name : cglib
INFO - using JDK 1.4 java.sql.Timestamp handling
INFO - configuring from resource: /hibernate.cfg.xml
INFO - Configuration resource: /hibernate.cfg.xml
INFO - Reading mappings from resource : BookingRow.hbm.xml
INFO - Mapping class: alisha.BookingRow -> BOOKINGROW
INFO - Reading mappings from resource : Month.hbm.xml
INFO - Mapping class: alisha.Month -> MONTH
INFO - Configured SessionFactory: null
INFO - Using Hibernate built-in connection pool (not for production
use!)
INFO - Hibernate connection pool size: 1
INFO - autocommit mode: false
INFO - using driver: org.h2.Driver at URL:
jdbc:h2:file:./h2Data/alisha
INFO - connection properties: {user=sa, password=****}
INFO - RDBMS: H2, version: 1.0.59 (2007-10-03)
INFO - JDBC driver: H2 JDBC Driver, version: 1.0.59 (2007-10-03)
INFO - Using dialect: org.hibernate.dialect.H2Dialect
INFO - Using default transaction strategy (direct JDBC transactions)
INFO - No TransactionManagerLookup configured (in JTA environment,
use of read-write or transactional second-level cache is not
recommended)
INFO - Automatic flush during beforeCompletion(): disabled
INFO - Automatic session close at end of transaction: disabled
INFO - JDBC batch size: 15
INFO - JDBC batch updates for versioned data: disabled
INFO - Scrollable result sets: enabled
INFO - JDBC3 getGeneratedKeys(): enabled
INFO - Connection release mode: auto
INFO - Default batch fetch size: 1
INFO - Generate SQL with comments: disabled
INFO - Order SQL updates by primary key: disabled
INFO - Order SQL inserts for batching: disabled
INFO - Query translator:
org.hibernate.hql.ast.ASTQueryTranslatorFactory
INFO - Using ASTQueryTranslatorFactory
INFO - Query language substitutions: {}
INFO - JPA-QL strict compliance: disabled
INFO - Second-level cache: enabled
INFO - Query cache: disabled
INFO - Cache provider: org.hibernate.cache.NoCacheProvider
INFO - Optimize cache for minimal puts: disabled
INFO - Structured second-level cache entries: disabled
INFO - Echoing all SQL to stdout
INFO - Statistics: disabled
INFO - Deleted entity synthetic identifier rollback: disabled
INFO - Default entity-mode: pojo
INFO - Named query checking : enabled
INFO - building session factory
INFO - Not binding factory to JNDI, no JNDI name configured
INFO - Running hbm2ddl schema export
INFO - exporting generated schema to database
INFO - schema export complete
Hibernate: insert into MONTH (ID, TEXT) values (null, ?)
Hibernate: insert into MONTH (ID, TEXT) values (null, ?)
Hibernate: insert into MONTH (ID, TEXT) values (null, ?)
ERROR - IllegalArgumentException in class: alisha.Month, getter method
of property: id
Exception in thread "main" java.lang.RuntimeException:
IllegalArgumentException occurred calling getter of alisha.Month.id
at alisha.Main.addBookingRow(Main.java:93)
at alisha.Main.main(Main.java:31)
Java Result: 1
BUILD SUCCESSFUL (total time: 6 seconds)
***
Ich habe schon einige Stunden damit verbracht, zu versuchen, die
Mapping-Dateien richtig hinzubekommen. Einfache Beispiele habe ich
nämlich nicht gefunden. Lt. SQL-Client stimmt aber die Struktur der
automatisch durch Hibernate erstellten Datenbank (Tabellen).
Kann mir bitte jemand einen Tipp geben?
Danke,
Christian.
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