#对象类型的注入
值类型：value属性 对象类型：ref属性
<bean name="user" class="Object.User" init-method="init" destroy-method="destroy"> <property name="name" value="wuxiangsheng"></property> <property name="age" value="20"></property> <property name="car" ref="car"></property> </bean> <bean name="car" class="Object.Car"> <property name="name" value="奥迪"></property> <property name="age" value="1"></property> </bean>#Set方式注入
直接在配置文件中指定对象属性的值
<bean name="user" class="Object.User"> <property name="name" value="wuxiangsheng"></property> <property name="age" value="20"></property> </bean>#构造方法注入
使用constructor-arg，为构造方法的属性传参。
为了在多个构造方法中确定指定的构造方法，使用type属性和index属性。
<bean name="user" class="Object.User"> <constructor-arg name="name" value="zhangsan"></constructor-arg> <constructor-arg name="age" value="30"></constructor-arg> </bean>#p名称空间注入
值类型：p：属性名=值 对象类型：p：属性名-ref=对象bean名
<!-- 导入额外空间 --> xmlns:p="http://www.springframework.org/schema/p" <bean name="user" class="Object.User" p:name="wxs" p:age="10" p:car-ref="car"></bean> <bean name="car" class="Object.Car"> <property name="name" value="奥迪"></property> <property name="age" value="1"></property> </bean>#SPEL(Spring Expression Language)注入
spel注入需要和Set注入或构造方法注入结合使用。
将value值修改为#{Bean对象名.属性}的格式。
注：引用类型没有spel注入，因此仍然使用ref！
<bean name ="user" class="Object.User"> <property name="name" value="#{user1.name}"></property> <property name="age" value="#{user1.age}"></property> <property name="car" ref="car"></property> </bean>#复杂类型注入
<bean name="cb" class="Object.CollectionBean"> <!-- 数组类型注入 --> <property name="arr"> <array> <value>wxs</value> <value>员工</value> </array> </property> <!-- List类型注入 --> <property name="list"> <list> <value>zhouyang</value> <value>清理员</value> </list> </property> <!-- Map类型注入 --> <property name="map"> <map> <entry key="姓名" value="吴祥生"></entry> <entry key="年龄" value="20"></entry> <entry key="汽车" value-ref="car"></entry> </map> </property> <!-- properties类型注入 --> <property name="properties"> <props> <prop key="url">http://www.jitwxs.cn</prop> <prop key="name">猿来极客</prop> </props> </property> </bean> <bean name="car" class="Object.Car"> <property name="name" value="奥迪"></property> <property name="age" value="1"></property> </bean>#相关JavaBean类
//User.java package Object; public class User { private String name; private Integer age; private Car car; public User(){} public User(String name, Integer age) { this.name = name; this.age = 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; } public Car getCar() { return car; } public void setCar(Car car) { this.car = car; } @Override public String toString() { return "User [name=" + name + ", age=" + age + ", car=" + car + "]"; } } //Car.java package Object; public class Car { 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; } @Override public String toString() { return "Car [name=" + name + ", age=" + age + "]"; } } //CollectionBean.java package Object; import java.util.Arrays; import java.util.List; import java.util.Map; import java.util.Properties; public class CollectionBean { private Object[] arr; private List list; private Map map; private Properties properties; public Map getMap() { return map; } public void setMap(Map map) { this.map = map; } public Object[] getArr() { return arr; } public void setArr(Object[] arr) { this.arr = arr; } public List getList() { return list; } public void setList(List list) { this.list = list; } public Properties getProperties() { return properties; } public void setProperties(Properties properties) { this.properties = properties; } @Override public String toString() { return "CollectionBean [arr=" + Arrays.toString(arr) + ", list=" + list + ", map=" + map + ", properties=" + properties + "]"; } }