执行 JavaScript 文件
// Required imports
import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import java.io.FileReader;
import java.io.FileNotFoundException;
// Obtain an instance of the JavaScript engine
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("nashorn");
// Load and execute a script from the file 'demo.js'
try {
engine.eval(new FileReader("demo.js"));
} catch (FileNotFoundException ex) {
ex.printStackTrace();
} catch (ScriptException ex) {
// This is the generic Exception subclass for the Scripting API
ex.printStackTrace();
}
// Outcome:
// 'Script from file!' printed on standard output
demo.js :
print('Script from file!');