public class HelloSpring {
	@Setter //必須有set屬性
	private String name;
	public void say() {
		System.out.println("hello---" + name);
	}
}
@Test
//把創(chuàng)建的對象交給spring框架管理
public void test1() throws Exception {
	//1讀取資源文件
	Resource resource = new ClassPathResource("/applicationContext.xml");
	//2創(chuàng)建spring容器對象
	BeanFactory bf = new XmlBeanFactory(resource);
	//3從srping容器中獲得指定名稱對象
	HelloSpring hello = bf.getBean("helloSpring", HelloSpring.class);

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
  http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

<beans>
  <bean name="helloSpring" class="全限定類名">
    <property name="需要注入的屬性名稱" value="注入值" />
  </bean>
</beans>

<import resource="classpath:bin目錄文件路徑"/>

@RunWith(SpringJUnit4ClassRunner.class)表示先啟動Spring容器，把junit運行在Spring容器中
@ContextConfiguration("classpath:applicationContext.xml")：表示從哪里加載資源文件
public class HelloWorldTest {
	@Autowired ：表示自動裝配
	private BeanFactory factory;
	@Test
	public void testSpringTest() throws Exception {
		HelloWorld helloWorld = factory.getBean("springTest", HelloWorld.class);
		helloWorld.sayHello();
	}
}

//針對于當前xml中所有的bean:是否需要延遲初始化.
<bean lazy-init="default | false | true"> 
//針對于指定的bean:是否需要延遲初始化.
<beans default-lazy-init="default | false | true">

<bean id="" class="" scope="作用域"/>
singleton: 單例 ，在Spring IoC容器中僅存在一個Bean實例 （默認的scope）
prototype: 多例 ，每次從容器中調(diào)用Bean時，都返回一個新的實例，即每次調(diào)用getBean()時 ，相當于執(zhí)行new XxxBean()：不會在容器啟動時創(chuàng)建對象
request: 用于web開發(fā)，將Bean放入request范圍 ，request.setAttribute("xxx") ， 在同一個request 獲得同一個Bean
session: 用于web開發(fā)，將Bean 放入Session范圍，在同一個Session 獲得同一個Bean 
globalSession: 一般用于Porlet應(yīng)用環(huán)境 , 分布式系統(tǒng)存在全局session概念（單點登錄），如果不是porlet環(huán)境，globalSession 等同于Session 
對于Struts2中的Action使用prototype類型，其他使用singleton

<bean />元素的：autowire屬性
<bean id="somebean" class="SomeBean全限定名" autowire="byType"/>

//實體類
@Setter
public class Employee {
	private String name;
}
//測試類
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class EmployeeTest {
	@Autowired
	  private ApplicationContext ctx;
	@Test
	  public void test1() throws Exception {
		Employee bean = ctx.getBean("employee", Employee.class);
		System.out.println(bean);
	}
}
//application配置
<bean id="employee" class="com.***.Employee">
  <property name="name" value="zoe" />
</bean>

public class Employee {
  private String name;
  public Employee(String name) {
    this.name = name;
  }
}
//application配置
<bean id="employee" class="com.***.Employee">
  <constructor-arg name="name" value="zoe" />
</bean>

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class PropertyPlaceHolderTest {
  @Autowired
  private DataSource ds ;

  @Test
  public void testLink() throws Exception {
    Connection conn = ds.getConnection();
    String sql = "select * from user";
    PreparedStatement ps = conn.prepareStatement(sql);
    ResultSet rs = ps.executeQuery();
  }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
  http://www.springframework.org/schema/beans 
  http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context 
  http://www.springframework.org/schema/context/spring-context.xsd
  ">
<!-- 加載 properties -->
<!-- system-properties-mode="NEVER" 不使用系統(tǒng)默認屬性 -->
<context:property-placeholder location="classpath:db.properties"
  system-properties-mode="NEVER" />

<!-- 配置連接池 -->
<bean id="ds" class="com.alibaba.druid.pool.DruidDataSource">
  <property name="driverClassName" value="${jdbd.driverClassName}" />
  <property name="url" value="${jdbd.url}" />
  <property name="jdbd.username" value="${username}" />
  <property name="jdbd.password" value="${password}" />
</bean>
</beans>

jdbd.driverClassName=com.mysql.jdbc.Driver
jdbd.url=jdbc:mysql:///springdemo
jdbd.username=root
jdbd.password=admin