Spring SpEL - Mathematical Operators

SpEL expression supports mathematical operators like +, -, * etc.

Following example shows the various use cases.

Example - Usage of Mathematical Operators in SpEL

Let's update the project created in Spring SpEL - Create Project chapter. We're updating following file −

• MainApp.java − Main application to run and test.

MainApp.java

Here is the content of MainApp.java file −

package com.tutorialspoint;

import java.text.ParseException;

import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;

public class MainApp {
   public static void main(String[] args) throws ParseException {
      ExpressionParser parser = new SpelExpressionParser();

      // evaluates to 5
      int result = parser.parseExpression("3 + 2").getValue(Integer.class);
      System.out.println(result);

      // evaluates to 1
      result = parser.parseExpression("3 - 2").getValue(Integer.class);
      System.out.println(result);

      // evaluates to 6
      result = parser.parseExpression("3 * 2").getValue(Integer.class);
      System.out.println(result);

      // evaluates to 1
      result = parser.parseExpression("3 / 2").getValue(Integer.class);
      System.out.println(result);

      // evaluates to 1
      result = parser.parseExpression("3 % 2").getValue(Integer.class);
      System.out.println(result);

      // follow operator precedence, evaluate to -9
      result = parser.parseExpression("1+2-3*4").getValue(Integer.class); 
      System.out.println(result);
   }
}

Output

Once you are done creating the source and bean configuration files, let us run the application. If everything is fine with your application, it will print the following message −

5
1
6
1
1
-9