Java调用打印机打印(远程、本地皆可用)
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获取PrinterJob
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设置PrinterJob纸张样式
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打印PDF
背景
开发个Java项目需要远程调用共享打印机打印
准备
环境
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内容
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JDK
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1.8.0_212
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开发工具
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IDEA
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打印机端和服务器端配置
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配置参考链接
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MAVEN环境
一般打印都生成PDF然后打印,PDF常用API有两个,pdfbox和itextpdf,依赖如下
pdfbox依赖
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.21</version>
</dependency>
itextpdf依赖
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.13</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-asian</artifactId>
<version>5.2.0</version>
</dependency>
步骤
获取PrinterJob
一般都用PrinterJob.lookupPrintServices()来获取本地配置的打印机列表
public static PrinterJob getPrintServiceByName(String printerName) throws Exception{
PrinterJob job = PrinterJob.getPrinterJob();
// 遍历查询打印机名称
boolean flag = false;
for (PrintService ps : PrinterJob.lookupPrintServices()) {
String psName = ps.toString();
// 选用指定打印机,需要精确查询打印机就用equals,模糊查询用contains
if (psName.contains(printerName)) {
flag = true;
job.setPrintService(ps);
break;
if(!flag){
throw new RuntimeException("打印失败,未找到名称为" + printerName + "的打印机,请检查。");
return job;
}
设置PrinterJob纸张样式
public static void setPageStyle(PDDocument document, PrinterJob job) {
job.setPageable(new PDFPageable(document));
Paper paper = new Paper();
int width = 215;
int height = 170;
// 设置打印纸张大小
paper.setSize(width,height); // 1/72 inch
// 设置边距,单位是像素,10mm边距,对应 28px
int marginLeft = 1;
int marginRight = 0;
int marginTop = 10;
int marginBottom = 0;
// 设置打印位置 坐标
paper.setImageableArea(marginLeft, marginRight, width - (marginLeft + marginRight), height - (marginTop + marginBottom));
// custom page format
PageFormat pageFormat = new PageFormat();
pageFormat.setPaper(paper);
// override the page format
Book book = new Book();
// append all pages 设置一些属性 是否缩放 打印张数等
book.append(new PDFPrintable(document, Scaling.ACTUAL_SIZE), pageFormat, 1);
job.setPageable(book);
}
打印PDF
public static PDDocument printPdf(String pdfPath, String printerName) throws Exception {
File file = new File(pdfPath);
PDDocument document = PDDocument.load(file);
PrinterJob job = getPrintServiceByName(printerName);
setPageStyle(document, job);
// 开始打印
job.print();
return document;
list 列表 用 [] “中括号”表示List = [1,1,2,3,5,8,9,4,1,6,1,1,1,'L']
>>> [1, 1, 2, 3, 5, 8, 9, 4, 1, 6, 1, 1, 1, 'L']1、count() 查找元素出现多少次,下面的语句表示“1”这个元素在上面的列表中出现了多少次,出现了6次。List.count(1)