Spring中的集合的注入方式
上代碼 bean.xml的配置
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <bean id="collectionBean" class="org.heinrich.CollectionBean"> <property name="sets"> <set> <value>Heinrich</value> <value>Reading Thinking Java</value> </set> </property> <property name="users"> <list> <ref bean="user1"/> <ref bean="user2"/> </list> </property> <property name="maps"> <map> <entry key="BookName"> <value>Thinking Java</value> </entry> <entry key="PhoneName"> <value>Apple 6 plus</value> </entry> </map> </property> <property name="properties"> <props> <prop key="1">MySQL</prop> <prop key="2">Oracle</prop> <prop key="3">SQLSERVER</prop> </props> </property> </bean> <bean id="user1" class="org.heinrich.User"> <property name="name"> <value>Heinrich</value> </property> <property name="age"> <value>21</value> </property> </bean> <bean id="user2" class="org.heinrich.User"> <property name="name"> <value>Zhangyanmei</value> </property> <property name="age"> <value>22</value> </property> </bean> </beans>
package org.heinrich;
public class User {
private String name;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
} 上面是實體類User,下面是需要注入的實體類
package org.heinrich;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
public class CollectionBean {
private List<User> users;
private Map<String,String> maps;
private Set<String> sets;
private Properties properties;
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
public Map<String, String> getMaps() {
return maps;
}
public void setMaps(Map<String, String> maps) {
this.maps = maps;
}
public Set<String> getSets() {
return sets;
}
public void setSets(Set<String> sets) {
this.sets = sets;
}
public Properties getProperties() {
return properties;
}
public void setProperties(Properties properties) {
this.properties = properties;
}
} 測試類
package org.heinrich;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class BeanTest {
public static void main(String[] args) {
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("bean.xml");
User user1 = (User)ctx.getBean("user1");
User user2 = (User)ctx.getBean("user1");
System.out.println(user1);
System.out.println(user2);
CollectionBean collectionBean = (CollectionBean)ctx.getBean("collectionBean");
System.out.println(collectionBean);
System.out.println(collectionBean.getMaps());
System.out.println(collectionBean.getSets());
System.out.println(collectionBean.getUsers());
System.out.println(collectionBean.getProperties());
}
} 測試結果
org.heinrich.User@f8dd88b
org.heinrich.User@f8dd88b
org.heinrich.CollectionBean@298395a7
{BookName=Thinking Java, PhoneName=Apple 6 plus}
[Heinrich, Reading Thinking Java]
[org.heinrich.User@f8dd88b, org.heinrich.User@7dd61c3b]
{3=SQLSERVER, 2=Oracle, 1=MySQL}
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