Java将一个含有逻辑运算符的字符串转化成逻辑表达式

public class TestA {
    public static void main(String[] args) throws Exception {
        String str = "(a >= 0 && b <= 5)";
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("js");
        engine.put("a", 4);
        engine.put("b", 5);
        Object result = engine.eval(str);
        System.out.println("结果类型:" + result.getClass().getName() + ",计算结果:" + result);
    }
}

输出结果:
结果类型:java.lang.Boolean,计算结果:false