hibernate5.2的基本配置方法(详解)
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2023-12-20 18:29:52
目标:将student实体对象加入数据库
1、首先需要下载三个东西:hibernate,slf4j,mysql。
2、分别取他们的包导入新建的项目中,我这里的版本是:h...
目标:将student实体对象加入数据库
1、首先需要下载三个东西:hibernate,slf4j,mysql。
2、分别取他们的包导入新建的项目中,我这里的版本是:hibernate-release-5.2.10里面lib目录下的required中的全部文件 slf4j-1.7.25下的受slf4j-nop-1.7.25.jar mysql的mysql-connector-java-5.1.42-bin.jar
3、在src下配置hibernate.cfg.xml(建议直接去文档复制然后改)
<?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> <!-- database connection settings --> <property name="connection.driver_class">com.mysql.jdbc.driver</property> <property name="connection.url">jdbc:mysql://localhost/text02</property> <property name="connection.username">root</property> <property name="connection.password">6530033197</property> <!-- jdbc connection pool (use the built-in) --> <!-- <property name="connection.pool_size">1</property> --> <!-- sql dialect --> <property name="dialect">org.hibernate.dialect.mysqldialect</property> <!-- enable hibernate's automatic session context management --> <!-- <property name="current_session_context_class">thread</property> --> <!-- disable the second-level cache --> <property name="cache.provider_class">org.hibernate.cache.internal.nocacheprovider</property> <!-- echo all executed sql to stdout --> <property name="show_sql">true</property> <!-- drop and re-create the database schema on startup --> <!-- <property name="hbm2ddl.auto">update</property> --> <mapping resource="student/student.hbm.xml"/> </session-factory> </hibernate-configuration>
4、在mysql中创建student表,字段:id age name
5、创建自己的实体类在src下建包student,然后建class:student.java
package student; public class student { private int id; private int age; private string name; public int getid() { return id; } public void setid(int id) { this.id = id; } public int getage() { return age; } public void setage(int age) { this.age = age; } public string getname() { return name; } public void setname(string name) { this.name = name; } public student(int id, int age, string name) { super(); this.id = id; this.age = age; this.name = name; } public student() { // todo auto-generated constructor stub } }
6、在对应package即student下配置文件:student.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="student"> <class name="student" table="student"> <id name="id" column="id"> </id> <property name="name" type="string" column="name"/> <property name="age" type="int" column="age"/> </class> </hibernate-mapping>
7、创建测试类:studenttext.java
package student; import org.hibernate.session; import org.hibernate.sessionfactory; import org.hibernate.cfg.configuration; public class studenttext { public static void main(string[] args) { student stu = new student(); stu.setid(4); stu.setname("小明"); stu.setage(12); configuration con = new configuration(); sessionfactory sf = con.configure().buildsessionfactory(); session s = sf.opensession(); s.begintransaction(); s.save(stu); s.gettransaction().commit(); s.close(); sf.close(); } }
输出结果,完成:
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