hibernate加载配置文件的两种方法

hibernate加载配置文件的两种方法：

(一)：configuration.configure();（默认加载src下的hibernate.cfg.xml文件）

代码：

如果使用了这种加载方法那么在hibernate.cfg.xml文件中就需要<mapping>XX.hbm.xml文件了

代码：

第二种方法使用的是con.addClass(class);方法

在test类中代码：

如果使用了这种那么在hibernate.cfg.xml文件中就不需要<mapping>了。

如果既使用了addClass方法也在cfg.xml文件中添加了mapping就会如下错误

java.lang.ExceptionInInitializerError

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:209)

at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:258)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)

at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:255)

at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)

at org.junit.runners.ParentRunner.run(ParentRunner.java:236)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from resource domain/Techer.hbm.xml

at org.hibernate.cfg.Configuration.addResource(Configuration.java:641)

at org.hibernate.cfg.Configuration.addClass(Configuration.java:688)

at dao.App.<clinit>(App.java:17)

... 23 more

Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping domain.Techer

at org.hibernate.cfg.Configuration$MappingsImpl.addClass(Configuration.java:2407)

at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:173)

at org.hibernate.cfg.Configuration.add(Configuration.java:771)

at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:606)

at org.hibernate.cfg.Configuration.addResource(Configuration.java:638)

... 25 more