How do I do math operations using Spring EL?

As we know that the simplest value that can be expressed in the Spring EL is a literal value such as number. Furthermore, we can also do math operations using the Spring EL. The spring configuration below show you how can do math operations using the Spring Expression Language. These operations include:

Add operation (+)
Subtract operation (-)
Multiply operation (*)
Divide operations (/)
Modulo operation (%)
Power operation (^)

<?xml version="1.0" encoding="UTF-8"?>
<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.xsd">

    <bean id="myBean" class="org.kodejava.spring.core.el.MyBean">
        <property name="total" value="#{50 + 50}" />
        <property name="length" value="#{100 - 10}" />
        <property name="size" value="#{10 * 10}" />
        <property name="reminder" value="#{10 % 3}" />
        <property name="distance" value="#{1000 / 10}" />
        <property name="power" value="#{2 ^ 10}" />
    </bean>

</beans>

The configuration above requires a bean / pojo called MyBean. It’s a simple class with some fields and getters and setters. Followed later by a simple class called SpELMathOperationDemo that demonstrate the Spring EL math operations.

package org.kodejava.spring.core.el;

public class MyBean {
    private int total;
    private int length;
    private int size;
    private float distance;
    private int reminder;
    private int power;

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public int getLength() {
        return length;
    }

    public void setLength(int length) {
        this.length = length;
    }

    public int getSize() {
        return size;
    }

    public void setSize(int size) {
        this.size = size;
    }

    public float getDistance() {
        return distance;
    }

    public void setDistance(float distance) {
        this.distance = distance;
    }

    public int getReminder() {
        return reminder;
    }

    public void setReminder(int reminder) {
        this.reminder = reminder;
    }

    public int getPower() {
        return power;
    }

    public void setPower(int power) {
        this.power = power;
    }
}

package org.kodejava.spring.core.el;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpELMathOperationDemo {
    public static void main(String[] args) {
        try (ClassPathXmlApplicationContext context =
                     new ClassPathXmlApplicationContext("spel-math-operation.xml")) {
            MyBean bean = (MyBean) context.getBean("myBean");
            System.out.println("bean.getTotal()    = " + bean.getTotal());
            System.out.println("bean.getLength()   = " + bean.getLength());
            System.out.println("bean.getSize()     = " + bean.getSize());
            System.out.println("bean.getReminder() = " + bean.getReminder());
            System.out.println("bean.getDistance() = " + bean.getDistance());
            System.out.println("bean.getPower()    = " + bean.getPower());
        }
    }
}

And these are the output printed out by the code snippet:

bean.getTotal()    = 100
bean.getLength()   = 90
bean.getSize()     = 100
bean.getReminder() = 1
bean.getDistance() = 100.0
bean.getPower()    = 1024

Maven Dependencies

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>5.3.23</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>5.3.23</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>5.3.23</version>
    </dependency>
</dependencies>

Author
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Wayan

Founder at Kode Java

A programmer, runner and recreational diver, lives on the island of Bali, Indonesia. Programming in Java, Spring Framework, Hibernate / JPA, MySQL. To support me working on this project, buy me a cup of coffee, every little bit helps. Thank you.

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