Passing Parameters to Scripts - Scripting in Java: Integrating with Groovy and JavaScript - page 46

public class CustomScriptOutput {
public static void main(String[] args) {
// Get the Nashorn engine
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("JavaScript");
// Print the absolute path of the output file
File outputFile = new File("jsoutput.txt");
System.out.println("Script output will be written to " +
outputFile.getAbsolutePath());
FileWriter writer = null;
try {
writer = new FileWriter(outputFile);
// Set a custom output writer for the engine
ScriptContext defaultCtx = engine.getContext();
defaultCtx.setWriter(writer);
// Execute a script
String script =
"print('Hello custom output writer')";
engine.eval(script);
}
catch (IOException | ScriptException e) {
e.printStackTrace();
}
finally {
if (writer != null) {
try {
writer.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
Script output will be written to C:\jsoutput.txt