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spring学习之注入对象

2015-10-07 20:34 465 查看

注入依赖对象

注入基本数据类型

通过value属性注入

在beans.xml文件中

<?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-2.0.xsd">
<bean id="PersonService" class="com.gc.service.impl.PersonServiceImpl">
<property name="name" value="nihao"></property>
</bean>
</beans>

在接口bean对象中

package com.gc.service.impl;

import com.gc.service.PersonService;

public class PersonServiceImpl implements PersonService {
public String name;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public void save() {
// TODO Auto-generated method stub
System.out.println("name:"+name);
System.out.println("save方法");
}
}

结果：

ref属性注入bean对象

注入集合类型

1.set集合

<?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-2.0.xsd">
<bean id="PersonService" class="com.gc.service.impl.PersonServiceImpl">
<property name="sets">
<set>
<value>first</value>
<value>second</value>
<value>third</value>
</set>
</property>
</bean>
</beans>

2.list集合

<?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-2.0.xsd">
<bean id="PersonService" class="com.gc.service.impl.PersonServiceImpl">
<property name="lists">
<list>
<value>first</value>
<value>second</value>
<value>third</value>
</list>
</property>
</bean>
</beans>

3.property

<?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-2.0.xsd">
<bean id="PersonService" class="com.gc.service.impl.PersonServiceImpl">
<property name="propertys">
<props>
<prop key="key1">first1</prop>
<prop key="key2">first2</prop>
<prop key="key3">first3</prop>
</props>
</property>
</bean>
</beans>

4.map类型

<?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-2.0.xsd">
<bean id="PersonService" class="com.gc.service.impl.PersonServiceImpl">
<property name="maps">
<map>
<entry key="key1" value="value1" />
<entry key="key2" value="value2" />
<entry key="key3" value="value3" />
</map>
</property>
</bean>
</beans>

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