1. Method 1: Method by a set injection
<bean id="user" class="com.fuke.domain.User">
<property name="username" value="张三"/>
<property name="password" value="1234"/>
</bean>
@Data
public class User {
private String username;
private String password;
}
2. injected through the constructor
<bean id="user" class="com.fuke.domain.User">
<constructor-arg name="username" value="张三"/>
<constructor-arg name="password" value="1234"/>
</bean>
public class User {
private String username;
private String password;
public User(String username,String password){
this.username = username;
this.password = password;
}
}
3.p namespace injection
Premise of this method is the introduction of labels, note that in this way can not be injected into the formation, only the injection mode set
xmlns: p = "http://www.springframework.org/schema/p"
<bean id="user" class="com.fuke.domain.User" p:password="132" p:username="张三">
</bean>
EL expression property injection
<bean id="dog" class="com.fuke.domain.Dog">
</bean>
<bean id="user" class="com.fuke.domain.User" >
<property name="username" value="#{'张三'}"/>
<property name="password" value="#{'李四'}"/>
<property name="age" value="#{20}"/>
<property name="dog" value="#{dog}"/>
</bean>
Injection properties arrays and collections
1. Array injection
<property name="attr">
<list>
<value>13</value>
<value>14</value>
</list>
</property>
2.list collection injection
<property name="mylist">
<list>
<value>13</value>
<value>14</value>
</list>
</property>
3.set collection injection
<property name="myset">
<set>
<value>000</value>
<value>001</value>
<value>002</value>
</set>
</property>
4.map collection injection
<property name="mymap">
<map>
<entry key="key01" value="value01"/>
<entry key="key02" value="value02"/>
</map>
</property>
