JAVA调用JS实现

后端JAVA开发有些代码逻辑其实在JS中很好实现，因为JS的对象定义不是很严格，避免了繁琐的POJO对象创建，JAVA标准库也提供了JS的调用引擎，方便我们直接复用JS的逻辑实现

注意定义JS方法接口中的方法名要与JS中的大小写完全一致，JS中的alert、console无法调用，但可以从异常捕获中获取调用异常的具体信息

代码参考：

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import java.io.FileReader;

ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("Nashorn");
String path = GridReportBean.class.getClassLoader().getResource("").getPath();
path = path.replaceAll("%20", " ");
engine.eval(new FileReader(path + "static/asserts/cloudPrint.js"));
if (engine instanceof Invocable) {
     Invocable invocable = (Invocable) engine;
     ICloudPrint executeMethod = invocable.getInterface(ICloudPrint.class);
     cloudPrintData = executeMethod.dataWrapper(JSON.toJSONString(printData.get("Detail"))
                                    , cloudPrintPlatform, printerName);
}

public interface ICloudPrint {

    String dataWrapper(String dataArrayStr, String cloudPrintPlatform, String printer);

}