Description: 1、spring依赖库
* SPRING_HOME/dist/spring.jar
* SPRING_HOME/lib/jakarta-commons/commons-logging.jar
* SPRING_HOME/lib/log4j/log4j-1.2.14.jar
2、拷贝spring配置文件到src下
3、拷贝log4j配置文件到src下
4、在UserManagerImpl中提供构造函数或setter方法，spring将实例化好的UserDao实现注入给我们
5、让spring管理我们的对象创建和依赖，必须在spring配置中进行定义
6、编写客户端
spring Ioc容器的关键点：
* 必须将被管理的对象定义到spring配置文件中
* 必须定义构造函数或setter方法，让spring将对象注入过来
To Search:
File list (Check if you may need any files):
spring_beginning
................\.classpath
................\.project
................\bin
................\...\applicationContext.xml
................\...\com
................\...\...\bjsxt
................\...\...\.....\spring
................\...\...\.....\......\client
................\...\...\.....\......\......\Client.class
................\...\...\.....\......\dao
................\...\...\.....\......\...\UserDao.class
................\...\...\.....\......\...\UserDao4MySqlImpl.class
................\...\...\.....\......\...\UserDao4OracleImpl.class
................\...\...\.....\......\manager
................\...\...\.....\......\.......\UserManager.class
................\...\...\.....\......\.......\UserManagerImpl.class
................\...\log4j.properties
................\readme.txt
................\src
................\...\applicationContext.xml
................\...\com
................\...\...\bjsxt
................\...\...\.....\spring
................\...\...\.....\......\client
................\...\...\.....\......\......\Client.java
................\...\...\.....\......\dao
................\...\...\.....\......\...\UserDao.java
................\...\...\.....\......\...\UserDao4MySqlImpl.java
................\...\...\.....\......\...\UserDao4OracleImpl.java
................\...\...\.....\......\manager
................\...\...\.....\......\.......\UserManager.java
................\...\...\.....\......\.......\UserManagerImpl.java
................\...\log4j.properties
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