使用 XML 从属性文件中注入布尔值始终为 false

Question

I am trying to inject boolean property from property file. the value of the attribute is alway false

the property

use.virtual.wallet=true

The xml configuration

<bean id="proxyUtil" class="com.util.ProxyServiceUtility">
    <property name="useVirtualWallet" value="${use.virtual.wallet}" />
</bean>

the bean

public class ProxyServiceUtility {

    private boolean useVirtualWallet;

    public void setUseVirtualWallet(boolean useVirtualWallet) {
        this.useVirtualWallet = useVirtualWallet;
    }

    public boolean isUseVirtualWallet() {
        return useVirtualWallet;
    }
}

useVirtualWallet is alway false

Answer 1

You have to load your properties file into Spring context using PropertyPlaceholderConfigurer .

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
  <property name="locations" value="classpath:com/foo/jdbc.properties"/>
</bean>

Answer 2

The problem fixed using this workaround, instead of injecting boolean , I injected String and then converted that String to boolean on the setter

public void setUseVirtualWallet(String useVirtualWallet) {
    this.useVirtualWallet =  Boolean.parseBoolean(useVirtualWallet);
}

Answer 3

Another variant

<beans 
       xmlns:context="http://www.springframework.org/schema/context">

    <context:property-placeholder location="classpath:com/foo/jdbc.properties"/>
    ...

<beans>