Variable in SPEL | StandardEvaluationContext

In SpEL, we can store a value in the variable and use the variable in the method and call the method. To work on variable, we need to use StandardEvaluationContext class.

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Example of Using variable in SPEL

Calculation.java

1. public class Calculation {  
2. private int number;  
3. public int getNumber() {  
4.     return number;  
5. }  
6. public void setNumber(int number) {  
7.     this.number = number;  
8. }  
9. public int cube(){  
10.     return number*number*number;  
11. }  
12. }  

Test.java

1. import org.springframework.expression.ExpressionParser;  
2. import org.springframework.expression.spel.standard.SpelExpressionParser;  
3. import org.springframework.expression.spel.support.StandardEvaluationContext;  
4.   
5. public class Test {  
6. public static void main(String[] args) {  
7. Calculation calculation=new Calculation();  
8. StandardEvaluationContext context=new StandardEvaluationContext(calculation);  
9.       
10. ExpressionParser parser = new SpelExpressionParser();  
11. parser.parseExpression("number").setValue(context,"5");  
12.       
13. System.out.println(calculation.cube());  
14. }  
15. }