condition ? true : false

spring el以注解形式

package com.h3.core;

import org.springframework.beans.factory.annotation.value;
import org.springframework.stereotype.component;

@component("customerbean")
public class customer {

	@value("#{itembean.qtyonhand < 100 ? true : false}")
	private boolean warning;

	public boolean iswarning() {
		return warning;
	}

	public void setwarning(boolean warning) {
		this.warning = warning;
	}

	@override
	public string tostring() {
		return "customer [warning=" + warning + "]";
	}

}

package com.h3.core;

import org.springframework.beans.factory.annotation.value;
import org.springframework.stereotype.component;

@component("itembean")
public class item {

	@value("99")
	private int qtyonhand;
	
	public int getqtyonhand() {
		return qtyonhand;
	}

	public void setqtyonhand(int qtyonhand) {
		this.qtyonhand = qtyonhand;
	}

}

输出

customer [warning=true]

spring el以xml形式

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
	xsi:schemalocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
 
	<bean id="customerbean" class="com.h3.core.customer">
		<property name="warning" 
                          value="#{itembean.qtyonhand < 100 ? true : false}" />
	</bean>
 
	<bean id="itembean" class="com.h3.core.item">
		<property name="qtyonhand" value="99" />
	</bean>
	
</beans>

输出结果

customer [warning=true]