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Spring能够从classpath下自动扫描，侦测和实例化具有特定注解的组件。
即，想要实现注解的方式配置bean需要满足2个条件：
以下实例说明：新增People类，请注意命名空间（之前举例的时候都基本都略去了命名空间部分，但是通过bean-scan来实现基于注解的注入时，对于命名空间就比较重要了）
package com.pfSoft.annotation;
import org.springframework.stereotype.Component;
@Component
public class People {
private String name;
private Integer age;
/**
*
* @return the name
*/
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}
/**
*
* @return the age
*/
public Integer getAge() {
return age;
}
/**
* @param age the age to set
*/
public void setAge(Integer age) {
this.age = age;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "People [name=" + name + ", age=" + age + "]";
}
}
新增接口和实现类：
package com.pfSoft.annotation.service;
public interface IPeopleManService {
public Boolean Adult(Integer age);
}
package com.pfSoft.annotation.service;
import org.springframework.stereotype.Service;
@Service(value="PeopleManService")
public class PeopleManServiceImp implements IPeopleManService {
public Boolean Adult(Integer age) {
Boolean ret=false;
if(age>=18)
{
ret=true;
}
return ret;
}
}
测试方法：
public class testAnnotation {
ApplicationContext ctx=null;
@Before
public void init() {
ctx=new ClassPathXmlApplicationContext("spring-annotation.xml");
}
@Test
public void test() {
People people= (People) ctx.getBean("people");
people.setAge(8);
people.setName("pf");
System.out.println(people);
IPeopleManService service=(IPeopleManService) ctx.getBean("PeopleManService");
if(service.Adult(people.getAge()))
{
System.out.println(MessageFormat.format("{0}成年了,{1}岁", people.getName(),people.getAge()));
}
else {
System.out.println(MessageFormat.format("{0}未成年，只有{1}岁", people.getName(),people.getAge()));
}
}
}
输出结果如下：
People [name=pf, age=8] pf未成年，只有8岁
resource-pattern实现过滤
<context:exclude-filter type="annotation" expression=""/>子节点表示要排除在外的目标类
<context:include-filter type="annotation" expression=""/>表示要包含的目标类
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原文地址：http://www.cnblogs.com/falcon-fei/p/5456779.html
