spring learning notes xml configuration

Posted by ffsja on Tue, 31 Dec 2019 19:21:28 +0100

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"


    <!--lazy-init Delay loading defaults to false After container initialization, the instance will be constructed if true If I get it bean Only when it's constructed-->
    <!--scope Scope is used to control the bean The default generation mechanism of is singleton Single interest mode has only one instance in the whole container-->
    <bean id="user" class="com.java12.spring.demo.User" lazy-init="true" scope="prototype" >
        <property name="id" value="1"></property>
        <property name="name" value="tom"></property>

    <util:list id="bo">
        <value>this is java</value>
        <value>java core</value>
        <value>java actual combat</value>

    <!--For sets list Property injection method-->
    <bean id="bookstore" class="com.java12.spring.entity.BookStop" p:id="123" p:books-ref="bo"></bean>

    <!--For sets set Attribute injection list And set The way is universal-->
    <bean id="math" class="com.java12.spring.entity.Math">
        <property name="name" value="Prime number"></property>
        <property name="nums">

    <!--For sets map Attribute injection-->
    <bean id="person" class="com.java12.spring.entity.Person">
        <property name="age" value="18"></property>
        <property name="idCards">
                <entry key="2121613213" value="213213213"></entry>
                <entry key="54215" value="4564652313"></entry>

    <!--Constructor injection inject based on the index of the constructor (unable to confirm whether the injected value is what you want)-->
    <bean id="construct" class="com.java12.spring.entity.Contruct">
        <constructor-arg index="0" value="101"></constructor-arg>
        <constructor-arg index="1" value="tom"></constructor-arg>
        <constructor-arg index="2" value="10.2"></constructor-arg>

    <!--Name the constructor's settings-->
    <bean id="con" class="com.java12.spring.entity.Contruct">
        <constructor-arg name="id" value="101"></constructor-arg>
        <constructor-arg name="name" value="guo"></constructor-arg>
        <constructor-arg name="weight" value="91.5"></constructor-arg>

    <!--Array form-->
    <bean id="arr" class="com.java12.spring.entity.Arrays" p:id="10" p:arr="abc,asd,dsa"></bean>

Configuring various properties of bean s in xml

id="xxx" spring obtains instances by id
Class = "full path of class" spring creates an instance based on class path reflection
Lazy init = "true" delay loading the instance creation time of the specified class is false by default. Create the class when loading the configuration file 

scope="prototype" scope is used to control the generation mechanism of bean s in the container. By default, the singleton singleton mode has only one instance in the whole container (the benefit of singleton is memory saving)
< util: list > < util: list > < util: Map > < util: Map > use the util tag to assign values to reference objects
    Injection of map set
< constructor Arg index = "0" value = "101" >
< constructor Arg name = "Id" value = "101" >



Topics: Spring Java xml Attribute