這篇文章主要為大家展示了“Hibernate如何配置”，內容簡而易懂，條理清晰，希望能夠幫助大家解決疑惑，下面讓小編帶領大家一起研究并學習一下“Hibernate如何配置”這篇文章吧。
Hibernate.cfg.xml是主配置文件，其中配置大體分為3部分：數據庫連接信息、其他參數、映射信息！
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <!-- 通常，一個session-factory節點代表一個數據庫 --> <session-factory> <!-- 1. 數據庫連接配置 --> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql:///test</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">root</property> <!-- 數據庫方言配置， hibernate在運行的時候，會根據不同的方言生成符合當前數據庫語法的sql --> <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property> <!-- 2. 其他相關配置 --> <!-- 2.1 顯示hibernate在運行時候執行的sql語句 --> <property name="hibernate.show_sql">false</property> <!-- 2.2 格式化sql --> <property name="hibernate.format_sql">true</property> <!-- 2.3 自動建表 --> <property name="hibernate.hbm2ddl.auto">update</property> <!-- 3. 加載所有映射 --> <mapping resource="com/rk/hibernate/a_hello/Employee.hbm.xml"/> </session-factory> </hibernate-configuration>
## MySQL #hibernate.dialect org.hibernate.dialect.MySQLDialect #hibernate.dialect org.hibernate.dialect.MySQLInnoDBDialect #hibernate.dialect org.hibernate.dialect.MySQLMyISAMDialect #hibernate.connection.driver_class com.mysql.jdbc.Driver #hibernate.connection.url jdbc:mysql:///test #hibernate.connection.username gavin #hibernate.connection.password
#hibernate.hbm2ddl.auto create-drop 每次在創建sessionFactory時候執行創建表；當調用sesisonFactory的close方法的時候，刪除表！ #hibernate.hbm2ddl.auto create 每次都重新建表； 如果表已經存在就先刪除再創建 #hibernate.hbm2ddl.auto update 如果表不存在就創建； 表存在就不創建； #hibernate.hbm2ddl.auto validate (生成環境時候) 執行驗證： 當映射文件的內容與數據庫表結構不一樣的時候就報錯！
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class App
{
public static void main(String[] args)
{
// 創建配置管理類對象
Configuration config = new Configuration();
// 加載主配置文件
config.configure();
// 創建工具類對象
SchemaExport export = new SchemaExport(config);
// 建表
// 第一個參數： 是否在控制臺打印建表語句
// 第二個參數： 是否執行腳本
export.create(true, true);
}
}常用配置參考文件：hibernate-distribution-3.6.0.Final\project\etc\hibernate.properties
###################### ### Query Language ### ###################### ## define query language constants / function names hibernate.query.substitutions yes 'Y', no 'N' ## select the classic query parser #hibernate.query.factory_class org.hibernate.hql.classic.ClassicQueryTranslatorFactory ################# ### Platforms ### ################# ## JNDI Datasource #hibernate.connection.datasource jdbc/test #hibernate.connection.username db2 #hibernate.connection.password db2 ## HypersonicSQL hibernate.dialect org.hibernate.dialect.HSQLDialect hibernate.connection.driver_class org.hsqldb.jdbcDriver hibernate.connection.username sa hibernate.connection.password hibernate.connection.url jdbc:hsqldb:./build/db/hsqldb/hibernate #hibernate.connection.url jdbc:hsqldb:hsql://localhost #hibernate.connection.url jdbc:hsqldb:test ## H2 (www.h3database.com) #hibernate.dialect org.hibernate.dialect.H2Dialect #hibernate.connection.driver_class org.h3.Driver #hibernate.connection.username sa #hibernate.connection.password #hibernate.connection.url jdbc:h3:mem:./build/db/h3/hibernate #hibernate.connection.url jdbc:h3:testdb/h3test #hibernate.connection.url jdbc:h3:mem:imdb1 #hibernate.connection.url jdbc:h3:tcp://dbserv:8084/sample; #hibernate.connection.url jdbc:h3:ssl://secureserv:8085/sample; #hibernate.connection.url jdbc:h3:ssl://secureserv/testdb;cipher=AES ## MySQL #hibernate.dialect org.hibernate.dialect.MySQLDialect #hibernate.dialect org.hibernate.dialect.MySQLInnoDBDialect #hibernate.dialect org.hibernate.dialect.MySQLMyISAMDialect #hibernate.connection.driver_class com.mysql.jdbc.Driver #hibernate.connection.url jdbc:mysql:///test #hibernate.connection.username gavin #hibernate.connection.password ## Oracle #hibernate.dialect org.hibernate.dialect.Oracle8iDialect #hibernate.dialect org.hibernate.dialect.Oracle9iDialect #hibernate.dialect org.hibernate.dialect.Oracle10gDialect #hibernate.connection.driver_class oracle.jdbc.driver.OracleDriver #hibernate.connection.username ora #hibernate.connection.password ora #hibernate.connection.url jdbc:oracle:thin:@localhost:1521:orcl #hibernate.connection.url jdbc:oracle:thin:@localhost:1522:XE ## PostgreSQL #hibernate.dialect org.hibernate.dialect.PostgreSQLDialect #hibernate.connection.driver_class org.postgresql.Driver #hibernate.connection.url jdbc:postgresql:template1 #hibernate.connection.username pg #hibernate.connection.password ## DB2 #hibernate.dialect org.hibernate.dialect.DB2Dialect #hibernate.connection.driver_class com.ibm.db2.jcc.DB2Driver #hibernate.connection.driver_class COM.ibm.db2.jdbc.app.DB2Driver #hibernate.connection.url jdbc:db2://localhost:50000/somename #hibernate.connection.url jdbc:db2:somename #hibernate.connection.username db2 #hibernate.connection.password db2 ## TimesTen #hibernate.dialect org.hibernate.dialect.TimesTenDialect #hibernate.connection.driver_class com.timesten.jdbc.TimesTenDriver #hibernate.connection.url jdbc:timesten:direct:test #hibernate.connection.username #hibernate.connection.password ## DB2/400 #hibernate.dialect org.hibernate.dialect.DB2400Dialect #hibernate.connection.username user #hibernate.connection.password password ## Native driver #hibernate.connection.driver_class COM.ibm.db2.jdbc.app.DB2Driver #hibernate.connection.url jdbc:db2://systemname ## Toolbox driver #hibernate.connection.driver_class com.ibm.as400.access.AS400JDBCDriver #hibernate.connection.url jdbc:as400://systemname ## Derby (not supported!) #hibernate.dialect org.hibernate.dialect.DerbyDialect #hibernate.connection.driver_class org.apache.derby.jdbc.EmbeddedDriver #hibernate.connection.username #hibernate.connection.password #hibernate.connection.url jdbc:derby:build/db/derby/hibernate;create=true ## Sybase #hibernate.dialect org.hibernate.dialect.SybaseDialect #hibernate.connection.driver_class com.sybase.jdbc2.jdbc.SybDriver #hibernate.connection.username sa #hibernate.connection.password sasasa #hibernate.connection.url jdbc:sybase:Tds:co3061835-a:5000/tempdb ## Mckoi SQL #hibernate.dialect org.hibernate.dialect.MckoiDialect #hibernate.connection.driver_class com.mckoi.JDBCDriver #hibernate.connection.url jdbc:mckoi:/// #hibernate.connection.url jdbc:mckoi:local://C:/mckoi1.0.3/db.conf #hibernate.connection.username admin #hibernate.connection.password nimda ## SAP DB #hibernate.dialect org.hibernate.dialect.SAPDBDialect #hibernate.connection.driver_class com.sap.dbtech.jdbc.DriverSapDB #hibernate.connection.url jdbc:sapdb://localhost/TST #hibernate.connection.username TEST #hibernate.connection.password TEST #hibernate.query.substitutions yes 'Y', no 'N' ## MS SQL Server #hibernate.dialect org.hibernate.dialect.SQLServerDialect #hibernate.connection.username sa #hibernate.connection.password sa ## JSQL Driver #hibernate.connection.driver_class com.jnetdirect.jsql.JSQLDriver #hibernate.connection.url jdbc:JSQLConnect://1E1/test ## JTURBO Driver #hibernate.connection.driver_class com.newatlanta.jturbo.driver.Driver #hibernate.connection.url jdbc:JTurbo://1E1:1433/test ## WebLogic Driver #hibernate.connection.driver_class weblogic.jdbc.mssqlserver4.Driver #hibernate.connection.url jdbc:weblogic:mssqlserver4:1E1:1433 ## Microsoft Driver (not recommended!) #hibernate.connection.driver_class com.microsoft.jdbc.sqlserver.SQLServerDriver #hibernate.connection.url jdbc:microsoft:sqlserver://1E1;DatabaseName=test;SelectMethod=cursor ## The New Microsoft Driver #hibernate.connection.driver_class com.microsoft.sqlserver.jdbc.SQLServerDriver #hibernate.connection.url jdbc:sqlserver://localhost ## jTDS (since version 0.9) #hibernate.connection.driver_class net.sourceforge.jtds.jdbc.Driver #hibernate.connection.url jdbc:jtds:sqlserver://1E1/test ## Interbase #hibernate.dialect org.hibernate.dialect.InterbaseDialect #hibernate.connection.username sysdba #hibernate.connection.password masterkey ## DO NOT specify hibernate.connection.sqlDialect ## InterClient #hibernate.connection.driver_class interbase.interclient.Driver #hibernate.connection.url jdbc:interbase://localhost:3060/C:/firebird/test.gdb ## Pure Java #hibernate.connection.driver_class org.firebirdsql.jdbc.FBDriver #hibernate.connection.url jdbc:firebirdsql:localhost/3050:/firebird/test.gdb ## Pointbase #hibernate.dialect org.hibernate.dialect.PointbaseDialect #hibernate.connection.driver_class com.pointbase.jdbc.jdbcUniversalDriver #hibernate.connection.url jdbc:pointbase:embedded:sample #hibernate.connection.username PBPUBLIC #hibernate.connection.password PBPUBLIC ## Ingres ## older versions (before Ingress 2006) #hibernate.dialect org.hibernate.dialect.IngresDialect #hibernate.connection.driver_class ca.edbc.jdbc.EdbcDriver #hibernate.connection.url jdbc:edbc://localhost:II7/database #hibernate.connection.username user #hibernate.connection.password password ## Ingres 2006 or later #hibernate.dialect org.hibernate.dialect.IngresDialect #hibernate.connection.driver_class com.ingres.jdbc.IngresDriver #hibernate.connection.url jdbc:ingres://localhost:II7/database;CURSOR=READONLY;auto=multi #hibernate.connection.username user #hibernate.connection.password password ## Mimer SQL #hibernate.dialect org.hibernate.dialect.MimerSQLDialect #hibernate.connection.driver_class com.mimer.jdbc.Driver #hibernate.connection.url jdbc:mimer:multi1 #hibernate.connection.username hibernate #hibernate.connection.password hibernate ## InterSystems Cache #hibernate.dialect org.hibernate.dialect.Cache71Dialect #hibernate.connection.driver_class com.intersys.jdbc.CacheDriver #hibernate.connection.username _SYSTEM #hibernate.connection.password SYS #hibernate.connection.url jdbc:Cache://127.0.0.1:1972/HIBERNATE ################################# ### Hibernate Connection Pool ### ################################# hibernate.connection.pool_size 1 ########################### ### C3P0 Connection Pool### ########################### #hibernate.c3p0.max_size 2 #hibernate.c3p0.min_size 2 #hibernate.c3p0.timeout 5000 #hibernate.c3p0.max_statements 100 #hibernate.c3p0.idle_test_period 3000 #hibernate.c3p0.acquire_increment 2 #hibernate.c3p0.validate false ############################## ### Proxool Connection Pool### ############################## ## Properties for external configuration of Proxool hibernate.proxool.pool_alias pool1 ## Only need one of the following #hibernate.proxool.existing_pool true #hibernate.proxool.xml proxool.xml #hibernate.proxool.properties proxool.properties ################################# ### Plugin ConnectionProvider ### ################################# ## use a custom ConnectionProvider (if not set, Hibernate will choose a built-in ConnectionProvider using hueristics) #hibernate.connection.provider_class org.hibernate.connection.DriverManagerConnectionProvider #hibernate.connection.provider_class org.hibernate.connection.DatasourceConnectionProvider #hibernate.connection.provider_class org.hibernate.connection.C3P0ConnectionProvider #hibernate.connection.provider_class org.hibernate.connection.ProxoolConnectionProvider ####################### ### Transaction API ### ####################### ## Enable automatic flush during the JTA beforeCompletion() callback ## (This setting is relevant with or without the Transaction API) #hibernate.transaction.flush_before_completion ## Enable automatic session close at the end of transaction ## (This setting is relevant with or without the Transaction API) #hibernate.transaction.auto_close_session ## the Transaction API abstracts application code from the underlying JTA or JDBC transactions #hibernate.transaction.factory_class org.hibernate.transaction.JTATransactionFactory #hibernate.transaction.factory_class org.hibernate.transaction.JDBCTransactionFactory ## to use JTATransactionFactory, Hibernate must be able to locate the UserTransaction in JNDI ## default is java:comp/UserTransaction ## you do NOT need this setting if you specify hibernate.transaction.manager_lookup_class #jta.UserTransaction jta/usertransaction #jta.UserTransaction javax.transaction.UserTransaction #jta.UserTransaction UserTransaction ## to use the second-level cache with JTA, Hibernate must be able to obtain the JTA TransactionManager #hibernate.transaction.manager_lookup_class org.hibernate.transaction.JBossTransactionManagerLookup #hibernate.transaction.manager_lookup_class org.hibernate.transaction.WeblogicTransactionManagerLookup #hibernate.transaction.manager_lookup_class org.hibernate.transaction.WebSphereTransactionManagerLookup #hibernate.transaction.manager_lookup_class org.hibernate.transaction.OrionTransactionManagerLookup #hibernate.transaction.manager_lookup_class org.hibernate.transaction.ResinTransactionManagerLookup ############################## ### Miscellaneous Settings ### ############################## ## print all generated SQL to the console #hibernate.show_sql true ## format SQL in log and console hibernate.format_sql true ## add comments to the generated SQL #hibernate.use_sql_comments true ## generate statistics #hibernate.generate_statistics true ## auto schema export #hibernate.hbm2ddl.auto create-drop #hibernate.hbm2ddl.auto create #hibernate.hbm2ddl.auto update #hibernate.hbm2ddl.auto validate ## specify a default schema and catalog for unqualified tablenames #hibernate.default_schema test #hibernate.default_catalog test ## enable ordering of SQL UPDATEs by primary key #hibernate.order_updates true ## set the maximum depth of the outer join fetch tree hibernate.max_fetch_depth 1 ## set the default batch size for batch fetching #hibernate.default_batch_fetch_size 8 ## rollback generated identifier values of deleted entities to default values #hibernate.use_identifer_rollback true ## enable bytecode reflection optimizer (disabled by default) #hibernate.bytecode.use_reflection_optimizer true ##################### ### JDBC Settings ### ##################### ## specify a JDBC isolation level #hibernate.connection.isolation 4 ## enable JDBC autocommit (not recommended!) #hibernate.connection.autocommit true ## set the JDBC fetch size #hibernate.jdbc.fetch_size 25 ## set the maximum JDBC 2 batch size (a nonzero value enables batching) #hibernate.jdbc.batch_size 5 #hibernate.jdbc.batch_size 0 ## enable batch updates even for versioned data hibernate.jdbc.batch_versioned_data true ## enable use of JDBC 2 scrollable ResultSets (specifying a Dialect will cause Hibernate to use a sensible default) #hibernate.jdbc.use_scrollable_resultset true ## use streams when writing binary types to / from JDBC hibernate.jdbc.use_streams_for_binary true ## use JDBC 3 PreparedStatement.getGeneratedKeys() to get the identifier of an inserted row #hibernate.jdbc.use_get_generated_keys false ## choose a custom JDBC batcher # hibernate.jdbc.factory_class ## enable JDBC result set column alias caching ## (minor performance enhancement for broken JDBC drivers) # hibernate.jdbc.wrap_result_sets ## choose a custom SQL exception converter #hibernate.jdbc.sql_exception_converter ########################## ### Second-level Cache ### ########################## ## optimize chache for minimal "puts" instead of minimal "gets" (good for clustered cache) #hibernate.cache.use_minimal_puts true ## set a prefix for cache region names hibernate.cache.region_prefix hibernate.test ## disable the second-level cache #hibernate.cache.use_second_level_cache false ## enable the query cache #hibernate.cache.use_query_cache true ## store the second-level cache entries in a more human-friendly format #hibernate.cache.use_structured_entries true ## choose a cache implementation #hibernate.cache.provider_class org.hibernate.cache.EhCacheProvider #hibernate.cache.provider_class org.hibernate.cache.EmptyCacheProvider hibernate.cache.provider_class org.hibernate.cache.HashtableCacheProvider #hibernate.cache.provider_class org.hibernate.cache.TreeCacheProvider #hibernate.cache.provider_class org.hibernate.cache.OSCacheProvider #hibernate.cache.provider_class org.hibernate.cache.SwarmCacheProvider ## choose a custom query cache implementation #hibernate.cache.query_cache_factory ############ ### JNDI ### ############ ## specify a JNDI name for the SessionFactory #hibernate.session_factory_name hibernate/session_factory ## Hibernate uses JNDI to bind a name to a SessionFactory and to look up the JTA UserTransaction; ## if hibernate.jndi.* are not specified, Hibernate will use the default InitialContext() which ## is the best approach in an application server #file system #hibernate.jndi.class com.sun.jndi.fscontext.RefFSContextFactory #hibernate.jndi.url file:/ #WebSphere #hibernate.jndi.class com.ibm.websphere.naming.WsnInitialContextFactory #hibernate.jndi.url iiop://localhost:900/
1、普通字段類型
2、主鍵映射
a)單列主鍵映射
b)多列作為主鍵映射
Employee.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- 映射文件: 映射一個實體類對象； 描述一個對象最終實現可以直接保存對象數據到數據庫中。 -->
<!--
package: 要映射的對象所在的包(可選,如果不指定,此文件所有的類都要指定全路徑)
auto-import 默認為true， 在寫hql的時候自動導入包名
如果指定為false, 在寫hql的時候必須要寫上類的全名；
如：session.createQuery("from com.rk.hibernate.d_hbm_config.Employee").list();
-->
<hibernate-mapping package="com.rk.hibernate.d_hbm_config" auto-import="true">
<!--
class 映射某一個對象的(一般情況，一個對象寫一個映射文件，即一個class節點)
name 指定要映射的對象的類型
table 指定對象對應的表；
如果沒有指定表名，默認與對象名稱一樣
-->
<class name="Employee" table="employee">
<!-- 主鍵，映射 -->
<id name="empId" column="id">
<!--
主鍵的生成策略
identity 自增長(mysql,db2)
sequence 自增長(序列)， oracle中自增長是以序列方法實現
native 自增長【會根據底層數據庫自增長的方式選擇identity或sequence】
如果是mysql數據庫, 采用的自增長方式是identity
如果是oracle數據庫， 使用sequence序列的方式實現自增長
increment 自增長(會有并發訪問的問題，一般在服務器集群環境使用會存在問題。)
assigned 指定主鍵生成策略為手動指定主鍵的值
uuid 指定uuid隨機生成的唯一的值
foreign (外鍵的方式， one-to-one講)
-->
<generator class="uuid"/>
</id>
<!--
普通字段映射
property
name 指定對象的屬性名稱
column 指定對象屬性對應的表的字段名稱，如果不寫默認與對象屬性一致。
length 指定字符的長度, 默認為255（只適用于字符串類型）
type 指定映射表的字段的類型，如果不指定會匹配屬性的類型
java類型： 必須寫全名 java.lang.String
hibernate類型： 直接寫類型，都是小寫 string
-->
<property name="empName" column="empName" type="string" length="20"></property>
<property name="workDate" column="workDate" type="java.util.Date"></property>
<!-- 如果列名稱為數據庫關鍵字，需要用反引號或改列名。 -->
<property name="desc" column="`desc`" type="java.lang.String"></property>
</class>
</hibernate-mapping>Employee.java
package com.rk.hibernate.d_hbm_config;
import java.util.Date;
public class Employee
{
private String empId;
private String empName;
private Date workDate;
private String desc;
public String getEmpId()
{
return empId;
}
public void setEmpId(String empId)
{
this.empId = empId;
}
public String getEmpName()
{
return empName;
}
public void setEmpName(String empName)
{
this.empName = empName;
}
public Date getWorkDate()
{
return workDate;
}
public void setWorkDate(Date workDate)
{
this.workDate = workDate;
}
public String getDesc()
{
return desc;
}
public void setDesc(String desc)
{
this.desc = desc;
}
@Override
public String toString()
{
return "Employee [empId=" + empId + ", empName=" + empName + ", workDate=" + workDate + ", desc=" + desc + "]";
}
}App.java
package com.rk.hibernate.d_hbm_config;
import java.util.Date;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.Test;
public class App
{
private static SessionFactory sessionFactory;
static
{
sessionFactory = new Configuration()
.configure()
.addClass(Employee.class) //會自動加載映射文件：Employee.hbm.xml。這樣，在hibernate.cfg.xml中就不用添加映射了
.buildSessionFactory();
}
@Test
public void testSave()
{
Session session = null;
Transaction tx = null;
try
{
Employee emp = new Employee();
emp.setEmpName("Tom");
emp.setWorkDate(new Date());
emp.setDesc("這里是描述");
session = sessionFactory.openSession();
tx = session.beginTransaction();
session.save(emp);
System.out.println("執行結束！");
}
catch(Exception e)
{
throw new RuntimeException(e);
}
finally
{
tx.commit();
session.close();
}
}
}（1）一個表能否有多個主鍵？ 不能。
（2）為什么要設置主鍵？ 數據庫存儲的數據都是有效的，必須保持唯一。
（3）為什么把id作為主鍵？因為表中通常找不到合適的列作為唯一列即主鍵，所以為了方法用id列，因為id是數據庫系統維護可以保證唯一，所以就把這列作為主鍵!
（4）聯合/復合主鍵。如果找不到合適的列作為主鍵，出來用id列以外，我們一般用聯合主鍵，即多列的值作為一個主鍵，從而確保記錄的唯一性。
聯合主鍵的案例
CompositeKeys.java
package com.rk.hibernate.e_compositekey;
import java.io.Serializable;
//復合主鍵類
public class CompositeKeys implements Serializable
{
private String username;
private String address;
public String getUsername()
{
return username;
}
public void setUsername(String username)
{
this.username = username;
}
public String getAddress()
{
return address;
}
public void setAddress(String address)
{
this.address = address;
}
}User.java
package com.rk.hibernate.e_compositekey;
public class User
{
// 名字跟地址，不會重復
private CompositeKeys pkeys;
private int age;
public CompositeKeys getPkeys()
{
return pkeys;
}
public void setPkeys(CompositeKeys pkeys)
{
this.pkeys = pkeys;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
@Override
public String toString()
{
return "User [username=" + pkeys.getUsername() + ", address=" + pkeys.getAddress() + ", age=" + age + "]";
}
}User.hbm.xml
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.rk.hibernate.e_compositekey" auto-import="true"> <class name="User" table="t_users"> <composite-id name="pkeys"> <key-property name="username" type="string"></key-property> <key-property name="address" type="string"></key-property> </composite-id> <property name="age" column="age" type="int" ></property> </class> </hibernate-mapping>
App.java
package com.rk.hibernate.e_compositekey;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.Test;
public class App
{
private static SessionFactory sessionFactory;
static
{
sessionFactory = new Configuration().configure().addClass(User.class).buildSessionFactory();
}
@Test
public void testSave()
{
Session session = null;
Transaction tx = null;
try
{
// 對象
CompositeKeys pkeys = new CompositeKeys();
pkeys.setAddress("火星");
pkeys.setUsername("小明");
User u = new User();
u.setPkeys(pkeys);
u.setAge(20);
// 保存
session = sessionFactory.openSession();
tx = session.beginTransaction();
session.save(u);
System.out.println("執行結束！");
}
catch(Exception e)
{
throw new RuntimeException(e);
}
finally
{
tx.commit();
session.close();
}
}
@Test
public void testQuery()
{
Session session = null;
Transaction tx = null;
try
{
//構建復合主鍵
CompositeKeys pkeys = new CompositeKeys();
pkeys.setAddress("火星");
pkeys.setUsername("小明");
// 查詢
session = sessionFactory.openSession();
tx = session.beginTransaction();
User u = (User) session.get(User.class, pkeys);
System.out.println(u);
System.out.println("執行結束！");
}
catch(Exception e)
{
throw new RuntimeException(e);
}
finally
{
tx.commit();
session.close();
}
}
}以上是“Hibernate如何配置”這篇文章的所有內容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內容對大家有所幫助，如果還想學習更多知識，歡迎關注億速云行業資訊頻道！
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