[Spring]-Property injection

To inject the Properies file method using spring:

1, SRC in a new settings.properties file, the contents are as follows:

Db_driverclassname=com.mysql.jdbc. driverdb_url=jdbc:mysql://127.0. 0.1/testdb_username=Rootdb_password=roottest_username=robintest_age =

2. Add this paragraph to spring's applicationcontext.xml:

    <BeanID= "Configproperties"class= "Org.springframework.beans.factory.config.PropertiesFactoryBean">        < Propertyname= "Locations">            <List>                <value>Classpath*:settings.properties</value>            </List>        </ Property>    </Bean>    <BeanID= "Propertyconfigurer"class= "Org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        < Propertyname= "Ignoreresourcenotfound"value= "false" />        < Propertyname= "Properties"ref= "Configproperties" />    </Bean>

The following spring's XML configuration can be used directly in this way:

    <BeanID= "DataSource"class= "Org.springframework.jdbc.datasource.DriverManagerDataSource">        < Propertyname= "Driverclassname"value= "${db_driverclassname}"/>        < Propertyname= "url"value= "${db_url}" />        < Propertyname= "username"value= "${db_username}" />        < Propertyname= "Password"value= "${db_password}" />    </Bean>

3. Create a new Class:Settings.java

 PackageCom.my.common;ImportOrg.springframework.beans.factory.annotation.Value;Importorg.springframework.stereotype.Component; @Component Public classSettings {Private StaticSettings instance;  Public StaticSettings getinstance () {returninstance; }     PublicSettings () {instance= This; } @Value ("#{configproperties[' Test_username '}")    PrivateString UserName; @Value ("#{configproperties[' Test_age '}")    Private intAge ;  PublicString GetUserName () {returnUserName; }     Public voidsetusername (String userName) { This. UserName =UserName; }     Public intGetage () {returnAge ; }     Public voidSetage (intAge ) {         This. Age =Age ; }}

You can then call this in the code:

Settings.getinstance (). GetUserName ()

[Spring]-Property injection