BE THE CODER > Spring > Expression Language

The Spring Expression Language (SpEL) is a simple and powerful expression language which helps to query and manipulate objects at runtime. The following example shows accessing static methods using T operator.

File Name :	com/bethecoder/tutorials/spring3/tests/spel/StaticMethodsTest.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.spring3.tests.spel;



import java.util.Arrays;



import org.springframework.expression.ExpressionParser;

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



public class StaticMethodsTest {



  /**

   * @param args

   */

  public static void main(String[] args) {



    ExpressionParser parser = new SpelExpressionParser();

    

    //Accessing Static Methods

    double random = parser.parseExpression(

        "T(Math).random() * 1729").getValue(Double.class);

    System.out.println(random);

    

    random = parser.parseExpression(

        "T(Math).ceil(  T(Math).random() * 1729 )").getValue(Double.class);

    System.out.println(random);

    

    String binary = parser.parseExpression(

        "T(Integer).toBinaryString(1729)").getValue(String.class);

    System.out.println(binary);

    

    int [] data = (int [])parser.parseExpression(

    "T(com.bethecoder.tutorials.spring3.tests.spel.SortUtility).sort({ 2, 4, 1, 3, 6, 5 })"

    ).getValue();

    System.out.println(Arrays.toString(data));



  }

}



class SortUtility {

  public static int [] sort(int [] data) {  

    Arrays.sort(data);

    return data;

  }

}