Spring EL ternary operator(if-then-else)example

Spring EL supports ternary operator,perform“if then else”conditional checting.For example,

condition ? true : false

Spring EL in Annotation
Spring EL ternary operatowith @Value annotation.In this example,if「itemBean.qtyOnHand」is less than 100,then set「customerBean.warning」to true,else set it to false.

package com.mkyong.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.mkyong.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; 
    }
}

Output

Customer [warning=true]

Spring EL in XML See equivalent version in bean definition XML file.

Output

Customer [warning=true]

In XML,you need to replace less than operator“<”with“<”.