Spring Util namespaces

The Util namespace in spring's configuration file is similar to the Java.util package class, and the Util namespace provides a collection-related configuration to import the Util namespace before using the namespace, as follows:

• Util namespace Introduction

1 <  xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"2    xmlns:util  = "Http://www.springframework.org/schema/util"3    xsi:schemalocation = "Http://www.springframework.org/schema/util http://www.springframework.org/schema/util/ Spring-util-4.1.xsd ">

• Configuring a list in spring

1 <!--Configure a list collection with the Util namespace--
2     <util:listID= "UserList"Value-type= "Java.lang.String">4         <value>Tom</value>5         <value>John doe</value>6         <value>Harry</value>7     </util:list>

• Configuring a Map collection in spring

1 <!--Configuring a Map collection -2     <Util:mapID= "UserMap">3         <entryKey= "User1"Value-ref= "User" />4         <entryKey= "User2">5             <!--Configuring an internal bean -6             <Beanclass= "Io.shuqi.ssh.spring.util.User">7                 < Propertyname= "Userage"value= " a" />8                 < Propertyname= "UserName"value= "Xiao Zhang" />9             </Bean>Ten         </entry> One     </Util:map>

• Configuring a set set in spring

1 <!--util Configuring a set Set -2     <Util:setID= "Userset">3         <value>Tom</value>4         <value>Harry</value>5         <value>Zhao Liu</value>6     </Util:set>

• Configuring a Properties collection in spring

<!--Configure a Properties -<util:propertiesID= "UserProperties">        <propKey= "Name">Tom</prop>        <propKey= "Age">12</prop></util:properties><!--A properties file to configure a properties -<util:properties Location= "Classpath:io/shuqi/ssh/spring/util/jdbc.properties"ID= "JDBC" />

In fact, <util:list>, <util:map>, <util:set>, <util:properties> and other tags are used by spring to A simple notation to replace Listfactorybean, Mapfactorybean, Setfactorybean, Propertiesfactorybean

• Other ways to load the configuration file properties in spring

1     <!-- 2 Context:property-placeholder (propertysourcesplaceholderconfigurer)3 load a Properties profile, and you can use the ${key} expression elsewhere to occupy the value of a bit property,4 *spring 2.5 can register the bean (Org.springframework.context.support.PropertySourcesPlaceholderConfigurer) before loading the configuration file 5      -6     <!--Spring 2.5 Used to load configuration files by registering beans -7     <Beanclass= "Org.springframework.context.support.PropertySourcesPlaceholderConfigurer"p:location= "Classpath:io/shuqi/ssh/spring/util/jdbc.properties"></Bean>8     <!--Loading properties files using the context namespace -9     <Context:property-placeholder Location= "Classpath:io/shuqi/ssh/spring/util/jdbc.properties" />

Spring Util namespaces