Hibernate 再接触 基础配置 搭建Log4j环境 Junit日志环境等

    <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">update</property>

有update create validate create-drop四种属性

update 表示如果映射的类中有加的类 会自动改表

create是指如果数据库没有创表可以自动帮创

validate会在执行操作前可以先验证有没有表

create-drop是指关闭sessionfactory之后自动drop掉表

一般实际开发先建表

 搭建Log4j日志环境

加入jar包

引入配置文件

Log4j.properties

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c:%L - %m%n

### direct messages to file hibernate.log ###
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=hibernate.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=warn, stdout

#log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=debug

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###
#log4j.logger.org.hibernate.type=info
#log4j.logger.org.hibernate.type=debug

### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace

可以注释掉不想要的内容

搭建Junit环境

学习maven 加入Junit类库

新建一个test

新建Junite test case

加入注解@Test

package com.easy;

import static org.junit.Assert.*;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class Teachertest {
    public static  SessionFactory sf = null;
    @BeforeClass
    public static void beforeclass(){
            sf = new AnnotationConfiguration().configure().buildSessionFactory();
    }
    @Test
    public void test() {
        student  su = new student();
          su.setId(13);
          su.setName("haha功");
          su.setAge(22);
          
          Session session = sf.openSession();
          session.beginTransaction();
          session.save(su);
          session.getTransaction().commit();
          session.close();
         
    }
   @AfterClass
   public static void afterclass(){
       sf.close();
   }
}

按照junite测试