Spring SpEL – Methods
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SpEL expression supports accessing methods of an object.
Following example shows the various use cases.
Example
Let”s update the project created in Spring SpEL – Create Project chapter. We”re adding/updating following files −
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Employee.java − Employee class.
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MainApp.java − Main application to run and test.
Here is the content of Employee.java file −
package com.tutorialspoint; public class Employee { private List<String> awards; public List<String> getAwards() { return awards; } public void setAwards(List<String> awards) { this.awards = awards; } public boolean isAwardee() { return awards != null && awards.size() > 0; } }
Here is the content of MainApp.java file −
package com.tutorialspoint; import java.text.ParseException; import java.util.Arrays; import org.springframework.expression.EvaluationContext; import org.springframework.expression.ExpressionParser; import org.springframework.expression.spel.standard.SpelExpressionParser; import org.springframework.expression.spel.support.StandardEvaluationContext; public class MainApp { public static void main(String[] args) throws ParseException { ExpressionParser parser = new SpelExpressionParser(); Employee employee = new Employee(); employee.setAwards(Arrays.asList("Star of the Month", "Champion", "Accelerator")); EvaluationContext employeeContext = new StandardEvaluationContext(employee); // string literal, evaluates to "t" String t = parser.parseExpression("''Tutorials''.substring(2, 3)").getValue(String.class); System.out.println(t); // evaluates to true boolean isAwardee = parser.parseExpression("isAwardee()").getValue(employeeContext, Boolean.class); System.out.println(isAwardee); } }
Output
t true
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