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