调用系统打印机打印

Java使用原生态的打印方法直接调用打印机打印，仅支持gif、jpeg、png

package com.example.demo.common;
import javax.print.*;
import javax.print.attribute.DocAttributeSet;
import javax.print.attribute.HashDocAttributeSet;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
public class PrintUtils {
    public static void main(String[] args) {
        print("C:/Users/92384/Documents/test.png");
    }
    public static void print(String pathName){
        File file = new File(pathName); //获取选择的文件
        //构建打印请求属性集
        PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
        //设置打印格式，因为未确定类型，所以选择autosense
        DocFlavor flavor = DocFlavor.INPUT_STREAM.PNG;
        PrintService service = PrintServiceLookup.lookupDefaultPrintService();
        System.out.println(service + " supports :");
        DocFlavor[] flavors = service.getSupportedDocFlavors();
        for (int i = 0; i < flavors.length; i++) {
            System.out.println("\t" + flavors[i]);
        }
        //定位默认的打印服务
        PrintService defaultService = PrintServiceLookup.lookupDefaultPrintService();
        //构造待打印的文件流
        InputStream fis = null;
        if(defaultService != null){
            try {
                DocPrintJob job = defaultService.createPrintJob(); //创建打印作业
                fis = new FileInputStream(file);
                DocAttributeSet das = new HashDocAttributeSet();
                Doc doc = new SimpleDoc(fis, flavor, das);  //指定打印内容
                job.print(doc, pras);
            } catch (Exception e) {
                e.printStackTrace();
            }  finally {
                try {
                    fis.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
}