java 二维码生成及其标签打印
2024-04-30 04:42:35
本文主要内容
- 二维码生成
- 二维码标签预览及打印
二维码生成
笔者此次的二维码是通过调用第三方接口生成的，具体流程如下：
- 根据规范要求调用第三方接口，返回二维码下载地址及二维码图片的属性值（图片大小等）
- 根据返回的值获取二维码下载地址，根据地址下载二维码图片，保存至本地磁盘及记录数据信息
- 扫描二维码跳转相应地址，显示资产的基本信息
- 最终生成的二维码如下图所示：
预览并批量打印二维码标签
先给大家看最终预览效果：
事先配置好标签打印机（标签亚银纸、树脂碳带等），点击右上方打印按钮，即可打印。打印标签效果如图：
前端
目前前端用的是 easyui，直接上代码：
{id: 'print',text: '打印',iconCls: 'icon-print',handler: function () {var rows = $('#dg').datagrid('getSelections');if (rows.length > 0) {var ids = "";for (var i = 0; i < rows.length; i++) {ids += rows[i].ID + ","}var id = ids.substring(0, ids.length - 1);window.open("${hostPrefix}swjEqu/qrCodeManageAction!printQr.action?id=" + id);} else {alert("请选择一条记录!");}}}
后端
主要用 itextPdf 处理
package com.whread.common.web.action;import com.opensymphony.xwork2.ActionSupport;import org.apache.log4j.Logger;
import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.ParameterAware;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.interceptor.SessionAware;
import org.apache.struts2.util.ServletContextAware;import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.Map;import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;@SuppressWarnings("serial")
public class BaseAction extends ActionSupport implements ServletRequestAware,ServletContextAware, ServletResponseAware, SessionAware,ApplicationAware, ParameterAware {protected HttpServletRequest request;protected HttpServletResponse response;protected HttpSession httpSession;protected Map session;protected Map parameters;protected Map application;private ServletContext servletContext;protected String msg;protected Logger log = Logger.getLogger(this.getClass());public BaseAction() {super();}public HttpServletRequest getServletRequest() {return this.request;}public void setServletRequest(HttpServletRequest req) {this.request = req;if (request != null) {this.httpSession = request.getSession();}}public HttpSession getHttpSession() {return this.httpSession;}public HttpServletResponse getServletResponse() {return this.response;}public void setServletResponse(HttpServletResponse rep) {this.response = rep;}public Map getSession() {return this.session;}public void setSession(Map session) {this.session = session;}public ServletContext getServletContext() {return this.servletContext;}public void setServletContext(ServletContext servletContext) {this.servletContext = servletContext;}public Map getApplication() {return this.application;}public void setApplication(Map application) {this.application = application;}public Map getParameters() {return this.parameters;}public void setParameters(Map parameters) {this.parameters = parameters;}public HttpServletRequest getRequest() {return request;}public void setRequest(HttpServletRequest request) {this.request = request;}public HttpServletResponse getResponse() {return response;}public void setResponse(HttpServletResponse response) {this.response = response;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}public Logger getLog() {return log;}public void setLog(Logger log) {this.log = log;}public void setHttpSession(HttpSession httpSession) {this.httpSession = httpSession;}public void writeResponseTxt(String responseTxt) {Writer writer;try {this.response.setContentType("text/html;charset=UTF-8");writer = this.response.getWriter();writer.write(responseTxt);writer.flush();writer.close();} catch (IOException e) {e.printStackTrace();}}protected void responseOutWithJson(String content) {try (PrintWriter out = response.getWriter()) {response.setContentType("application/json;charset=UTF-8");out.println(content);out.flush();} catch (Exception e) {e.printStackTrace();}}
}//需导入的核心jar包
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import com.itextpdf.text.pdf.draw.DottedLineSeparator;public class QrCodeManageAction extends BaseAction {
/*** 预览二维码信息，并可批量打印* @return*/public void printQr() {String path = request.getServletContext().getRealPath("/");response.setContentType("application/pdf");try {response.setHeader("content-disposition", "filename=资产信息.pdf");OutputStream out = response.getOutputStream();float[] rectSize = {4, 1, 4, 2};printQrInfo(out, rectSize, path);} catch (Exception e) {e.printStackTrace();}}
}/*** 预览、打印二维码pdf* @param out* @param reportMap* @param rectSize* @param path*/public static void printQrInfo(OutputStream out, float[] rectSize, String path) throws IOException, DocumentException {// SIMHEI.TTF 文件字体文件，可下载至本地 ，此处更改为相应本地地址BaseFont bfChinese = BaseFont.createFont( path+"/fonts/SIMHEI.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);Rectangle rect = new Rectangle(170F, 85.0F);// A4纸张rect.setBackgroundColor(BaseColor.WHITE);//方正小标送简 常规 -标签标题BaseFont bfChinese1 = BaseFont.createFont( path+"/fonts/FZXBSJW.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);Font song22 = new Font(bfChinese1, 8, Font.BOLD);BaseFont bfChinese2 = BaseFont.createFont( path+"/fonts/SIMFANG.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);Font fang16 = new Font(bfChinese2, 6, Font.BOLD);BaseFont bfChinese3 = BaseFont.createFont( path+"/fonts/simkai.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);Font kai16 = new Font(bfChinese3, 7, Font.BOLD);//西文 16号 Times New RomanBaseFont bfChinese4 = BaseFont.createFont( path+"/fonts/TIMES.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);Font roman16 = new Font(bfChinese4, 7, Font.BOLD);//人名 方正行楷 FZXKJW.TTFBaseFont bfChinese5 = BaseFont.createFont( path+"/fonts/FZXKJW.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);Font fzxk16 = new Font(bfChinese5, 9);Document doc = new Document(rect, rectSize[0], rectSize[1], rectSize[2], rectSize[3]);PdfWriter writer = PdfWriter.getInstance(doc, out);writer.setPdfVersion(PdfWriter.PDF_VERSION_1_2);//文档属性doc.addTitle("资产信息");doc.open();//加入内容PdfPTable tab = new PdfPTable(1);PdfPCell cell = new PdfPCell();for (int i=0;i<infos.size();i++) {createPrintQrInfo(doc, tab, cell, song22, fang16, kai16, roman16, fzxk16);}doc.newPage();doc.close();}private static void createPrintQrInfo(Document doc, PdfPTable tab, PdfPCell cell, Font titleFont1, Font valueFont, Font kai16, Font roman16, Font fzxk16) throws DocumentException {//这里打印的是 60mm * 30mm 大小的标签，故这里参数很重要int [] cellWidth = {35,70,65};tab = new PdfPTable(3);tab.setLockedWidth(true);tab.setTotalWidth(165);tab.getDefaultCell().setMinimumHeight(15f);tab.setHorizontalAlignment(Element.ALIGN_CENTER);tab.setWidths(cellWidth);cell = PdfCellUtill.createCell(ObjUtils.defaultIfNull("", titleFont1,PdfPCell.ALIGN_CENTER,PdfPCell.ALIGN_MIDDLE,3,0);cell.setFixedHeight(15f);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);cell.setBorderWidthRight(0.5f);cell.setUseAscender(true);cell.setVerticalAlignment(cell.ALIGN_MIDDLE);cell.setHorizontalAlignment(Element.ALIGN_CENTER); //水平居中cell.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中tab.addCell(cell);cell = PdfCellUtill.createCell("资产名称", kai16,PdfPCell.ALIGN_CENTER,PdfPCell.ALIGN_MIDDLE,1,0);cell.setFixedHeight(15f);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);tab.addCell(cell);cell = PdfCellUtill.createCell("资产名称1", valueFont,PdfPCell.ALIGN_LEFT,PdfPCell.ALIGN_MIDDLE,1,0);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);tab.addCell(cell);Image imageQjPhoto = null;// 二维码图片路径try{imageQjPhoto = Image.getInstance("g://qrcode.png");} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}imageQjPhoto.scaleAbsoluteWidth(59);imageQjPhoto.scaleAbsoluteHeight(59);cell = PdfCellUtill.createCell("", valueFont,PdfPCell.ALIGN_CENTER,PdfPCell.ALIGN_MIDDLE,1,4);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);cell.setBorderWidthRight(0.5f);cell.setBorderWidthBottom(0.5f);cell.addElement(imageQjPhoto);tab.addCell(cell);cell = PdfCellUtill.createCell("资产编号", kai16,PdfPCell.ALIGN_CENTER,PdfPCell.ALIGN_MIDDLE,1,0);cell.setFixedHeight(15f);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);tab.addCell(cell);cell = PdfCellUtill.createCell("资产编号1", roman16,PdfPCell.ALIGN_LEFT,PdfPCell.ALIGN_MIDDLE,1,0);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);tab.addCell(cell);cell = PdfCellUtill.createCell("购置日期", kai16,PdfPCell.ALIGN_CENTER,PdfPCell.ALIGN_MIDDLE,1,0);cell.setFixedHeight(15f);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);tab.addCell(cell);cell = PdfCellUtill.createCell("2021-01-01", roman16,PdfPCell.ALIGN_LEFT,PdfPCell.ALIGN_MIDDLE,1,0);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);tab.addCell(cell);cell = PdfCellUtill.createCell("使 用 人", kai16,PdfPCell.ALIGN_CENTER,PdfPCell.ALIGN_MIDDLE,1,0);cell.setFixedHeight(15f);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);cell.setUseAscender(true);cell.setVerticalAlignment(cell.ALIGN_MIDDLE);cell.setHorizontalAlignment(Element.ALIGN_CENTER); //水平居中cell.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中cell.setBorderWidthBottom(0.5f);tab.addCell(cell);cell = PdfCellUtill.createCell("张三", fzxk16,PdfPCell.ALIGN_LEFT,PdfPCell.ALIGN_MIDDLE,1,0);cell.setBorderWidthTop(0.5f);cell.setBorderWidthLeft(0.5f);cell.setBorderWidthBottom(0.5f);tab.addCell(cell);doc.add(tab);}
import com.itextpdf.text.Font;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.PdfPCell;public class PdfCellUtill {private static PdfPCell pdfCell;/*** 创建PdfCell* @param content 内容文本（短语）* @param font 字体* @return 返回PdfCell*/public static PdfPCell createCell(String content,Font font){pdfCell = new PdfPCell(new Phrase(content, font)); pdfCell.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);pdfCell.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);pdfCell.setBorder(0);return pdfCell;}/*** * 创建PdfCell* @param content 内容文本（短语）* @param font 字体* @param horizontalAlignment 水平位置对齐* @param verticalAlignment 垂直位置对齐* @return 返回PdfCell*/public static PdfPCell createCell(String content,Font font,int horizontalAlignment,int verticalAlignment){pdfCell = new PdfPCell(new Phrase(content, font));pdfCell.setHorizontalAlignment(horizontalAlignment);pdfCell.setVerticalAlignment(verticalAlignment);pdfCell.setBorder(0);return pdfCell;}/*** * 创建PdfCell* @param content 内容文本（短语）* @param font 字体* @param horizontalAlignment 水平位置对齐* @param verticalAlignment 垂直位置对齐* @param colspan 合并列数* @param rowspan 合并行数* @return 返回PdfCell*/public static PdfPCell createCell(String content,Font font,int horizontalAlignment,int verticalAlignment ,int colspan,int rowspan){pdfCell = new PdfPCell(new Phrase(content, font));pdfCell.setHorizontalAlignment(horizontalAlignment);pdfCell.setVerticalAlignment(verticalAlignment);if(colspan>0){pdfCell.setColspan(colspan);}if(rowspan>0){pdfCell.setRowspan(rowspan);}pdfCell.setBorder(0);return pdfCell;}/*** * @param content 内容文本（段落）* @param font 字体* @return 返回PdfCell*/public static PdfPCell createCellParagraph(String content,Font font){pdfCell = new PdfPCell(new Paragraph(content, font));pdfCell.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);pdfCell.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);pdfCell.setBorder(0);return pdfCell;}/*** * @param content 内容文本（段落）* @param font 字体* @param horizontalAlignment 水平对齐* @param verticalAlignment 垂直位置对齐* @return 返回PdfCell*/public static PdfPCell createCellParagraph(String content,Font font,int horizontalAlignment,int verticalAlignment){pdfCell = new PdfPCell(new Paragraph(content, font));pdfCell.setHorizontalAlignment(horizontalAlignment);pdfCell.setVerticalAlignment(verticalAlignment);pdfCell.setBorder(0);return pdfCell;}/*** * @param content 内容文本（段落）* @param font 字体* @param horizontalAlignment 水平对齐* @param verticalAlignment 垂直位置对齐* @param colspan 合并列数* @param rowspan 合并行数* @return 返回PdfCell*/public static PdfPCell createCellParagraph(String content,Font font,int horizontalAlignment,int verticalAlignment,int colspan,int rowspan){pdfCell = new PdfPCell(new Paragraph(content, font));pdfCell.setHorizontalAlignment(horizontalAlignment);pdfCell.setVerticalAlignment(verticalAlignment);if(colspan>0){pdfCell.setColspan(colspan);}if(rowspan>0){pdfCell.setRowspan(rowspan);}pdfCell.setBorder(0);return pdfCell;}}
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