Call printer demo

The printservice interface is the factory of docprintjob. Printservice describes the features of a printer and allows you to query the attributes supported by the printer. Java code Import java. Io. file; Import java. Io. fileinputstream; Import javax. Print. Doc; Import javax. Print. docflavor; Import javax. Print. docprintjob; Import javax. Print. printservice; Import javax. Print. printservicelookup; Import javax. Print. serviceui; Import javax. Print. simpledoc; Import javax. Print. Attribute. docattributeset; Import javax. Print. Attribute. hashdocattributeset; Import javax. Print. Attribute. hashprintrequestattributeset; Import javax. Swing. jfilechooser; /** * Establish a connection with the printer * @ Author Administrator * */ Public class printdemo { Public static void main (string [] ARGs ){ Jfilechooser filechooser = new jfilechooser (); // create a print job Int state = filechooser. showopendialog (null ); If (State = filechooser. approve_option ){ File file = new file ("D:/zkyzl.txt"); // obtain the selected file // Construct the print request property set Hashprintrequestattributeset pras = new hashprintrequestattributeset (); // Set the print format. Because the type is not determined, select autosense. Docflavor flavor = docflavor. input_stream.autosense; // Find all available print services Printservice [] = printservicelookup. lookupprintservices (flavor, pras ); // Locate the default Print Service Printservice defaultservice = printservicelookup. lookupdefaprintprintservice (); // Display the Print dialog box Printservice service = serviceui. printdialog (null, 200,200, printservice, Defaservice service, flavor, pras ); If (service! = NULL ){ Try { Docprintjob job = service. createprintjob (); // create a print job Fileinputstream FCM = new fileinputstream (File); // construct the file stream to be printed Docattributeset DAS = new hashdocattributeset (); Doc = new simpledoc (FCM, flavor, das ); Job. Print (Doc, pras ); } Catch (exception e ){ E. printstacktrace (); } } } } }