スタンドアロンELのサンプル

ELTest.java

package com.example;

import javax.el.*;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Supplier;

public class ELTest {
    public static void main(String[] args) {
        ELManager elManager = new ELProcessor().getELManager();
        StandardELContext ctx = elManager.getELContext();

        ExpressionFactory factory = ELManager.getExpressionFactory();
        elManager.setVariable("foo", factory.createValueExpression("hoge", String.class));
        elManager.setVariable("bar",
                            factory.createValueExpression(
                                    ((Supplier<Map>) () -> {
                                        Map map = new HashMap();
                                        map.put("a", "あいうえお");
                                        map.put("b", "かきくけこ");
                                        return map;
                                    }).get(), Map.class));
        ValueExpression exp = factory.createValueExpression(
                ctx,
                "テキスト:${foo}\n${bar['a']}  ${bar['b']}",
                String.class);
        System.out.println(exp.getValue(ctx));
    }
}