package lin;

import java.util.Date;

import javax.persistence.Entity;

import javax.persistence.Id;

import javax.persistence.Table;

//學(xué)生類(lèi)

@Entity

@Table(name="students_info")

public class Students {

// 1.公有的類(lèi)

// 2、提供公有的不帶參數(shù)的默認(rèn)的構(gòu)造方法

// 3.屬性私有

// 4.屬性setter，getter封裝

@Id

private int sid; // 學(xué)號(hào)

private String sname; // 姓名

private String gender; // 性別

private Date birthday; // 出生日期

private String address;// 地址

public Students() {

}

public Students(int sid, String sname, String gender, Date birthday, String address) {

// super();

this.sid = sid;

this.sname = sname;

this.gender = gender;

this.birthday = birthday;

this.address = address;

}

public int getSid() {

return sid;

}

public void setSid(int sid) {

this.sid = sid;

}

public String getSname() {

return sname;

}

public void setSname(String sname) {

this.sname = sname;

}

public String getGender() {

return gender;

}

public void setGender(String gender) {

this.gender = gender;

}

public Date getBirthday() {

return birthday;

}

public void setBirthday(Date birthday) {

this.birthday = birthday;

}

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

@Override

public String toString() {

return "Students [sid=" + sid + ", sname=" + sname + ", gender=" + gender + ", birthday=" + birthday

+ ", address=" + address + "]";

}

}

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

?<session-factory>

? <property name="connection.username">root</property>

? <property name="connection.password">123456</property>

? <property name="connection.driver_class">com.mysql.jdbc.Driver</property>

? <property name="connection.url">jdbc:mysql://localhost:3306/hibernate?useUnicode=true&amp;characterEncoding=UTF-8</property>

? <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

? <property name="show_sql">true</property>

? <property name="hibernate.format_sql">true</property>

? <property name="hdm2ddl.auto">create</property>

??

? <property name="hibernate.current_session_context_class">thread</property>

? <mapping class="lin.Students"/>

?</session-factory>

</hibernate-configuration>

import java.util.Date;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import lin.Students;

//測(cè)試類(lèi)

public class StudentsTest{

private SessionFactory sessionFactory;

private Session session;

private Transaction transaction;

@Before

public void init(){

//創(chuàng)建配置對(duì)象

//不帶參數(shù)的configure（）方法默認(rèn)加載hibernate.cfg.xml文件

//如果傳入abc.xml作為參數(shù)，則不再加載hibernate.cfg.xml,改為加載abc.xml

Configuration config = new Configuration().configure();

//創(chuàng)建服務(wù)注冊(cè)對(duì)象

ServiceRegistry serviceRegistry=new StandardServiceRegistryBuilder().applySettings(config.getProperties()).build();

//創(chuàng)建會(huì)話工廠對(duì)象

sessionFactory = config.buildSessionFactory(serviceRegistry);

//創(chuàng)建會(huì)話對(duì)象

session=sessionFactory.openSession();

//開(kāi)啟事務(wù)

transaction=session.beginTransaction();

}

@After

public void destroy(){

transaction.commit(); //提交事務(wù)

session.close(); // 關(guān)閉會(huì)話

sessionFactory.close();//關(guān)閉會(huì)話工廠

}

@Test

public void testSaveStudents()

{

//生成學(xué)生對(duì)象

Students s =new Students(1,"張三豐","男",new Date(),"武當(dāng)山");

session.save(s); //保存對(duì)象進(jìn)數(shù)據(jù)庫(kù)

}

}

運(yùn)行結(jié)果：

org.hibernate.MappingException: Unknown entity: lin.Students

at org.hibernate.metamodel.internal.MetamodelImpl.entityPersister(MetamodelImpl.java:620)

at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1596)

at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:104)

at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)

at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)

at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)

at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)

at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)

at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:668)

at org.hibernate.internal.SessionImpl.save(SessionImpl.java:660)

at org.hibernate.internal.SessionImpl.save(SessionImpl.java:655)

at StudentsTest.testSaveStudents(StudentsTest.java:56)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)

at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

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

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)