Spring injection properties in various ways

Going records easy to remember

1, by way of injection setter <property>

The premise has provided setter methods

1.1 <! - injection method using the data of the normal data setter ->

        <bean id="userService" class="com.test.SpringDI.userServiceImpl">

       　　　  <! - The first ->

                   <property name="number" value="1232333"></property> 

　　　　　　<! - second ->

                  <property name="number" >

                  <value>wechat</value>

                  </property> 

　　　</bean>

1.2 <! - injection method using the data reference data setter ->

        <bean id="userService" class="com.test.SpringDI.userServiceImpl">

       　　　  <! - The first ->

                   <property name="xxxDao" ref="xxxDao"></property> 

　　　　　　<! - second ->

                  <property name="xxxDao" >

                  <ref bean="xxxDao">

                  </property> 

　　　</bean>

2, the injection parameters constructor

The premise of providing a default constructor to use the first constructor

<the bean ID = "that userService" class = "com.test.SpringDI.userServiceImpl">
<-! used constructor injection data by name ->
<-! <constructor Arg-name = "NUM" value = "123 "> </ Arg-constructor>
<constructor Arg-name =" S "value =" WeChat "> </ Arg-constructor> ->
<-! constructor injection by using the index data ->
<! - <constructor Arg-index = "0" value = "12,390,934"> </ Arg-constructor>
<constructor Arg-index = ". 1" value = "wechatmissing"> </ Arg-constructor> ->

</bean>

3, p namespace 

<! - injected through the p-namespace data format setter is: p: attribute name = "" p: attribute name -ref = "" ->

<bean id="userService" class="com.test.SpringDI.userServiceImpl" p:number="9999" p:s="qqfeiche" p:userdao-ref="userDao">
</bean>

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