silentprintservlet.java
来自「java编程java编程java编程java编程java编程java编程java」· Java 代码 · 共 148 行
JAVA
148 行
/** * Title: SilentPrintServlet * Description: Explain to print silently via Servlet/Browser * @author Heiner Jostkleigrewe, Heiner.Jostkleigrewe@gt-net.de * @since iText paolo 0.89a */import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import com.lowagie.text.*;import com.lowagie.text.pdf.*;public class SilentPrintServlet extends HttpServlet{ public static final int ACT_INIT = 0; public static final int ACT_REPORT_1 = 1; public SilentPrintServlet() { } public void doGet(HttpServletRequest requ, HttpServletResponse resp) throws ServletException, IOException { doWork(requ, resp); } public void doPost(HttpServletRequest requ, HttpServletResponse resp) throws ServletException, IOException { doWork(requ, resp); } public void doWork(HttpServletRequest requ, HttpServletResponse resp) throws ServletException, IOException { ServletOutputStream out = resp.getOutputStream(); int action = ACT_INIT; int sub = ACT_INIT; try { action = Integer.parseInt(requ.getParameter("action")); sub = Integer.parseInt(requ.getParameter("sub")); } catch (Exception e) {} switch (action) { case ACT_INIT: { htmlHeader(out, requ, resp); formular(out, requ, resp, sub); break; } case ACT_REPORT_1: { Document document = new Document(PageSize.A4, 10, 10, 40, 10); ByteArrayOutputStream baos = new ByteArrayOutputStream(); try { PdfWriter writer = PdfWriter.getInstance(document, baos); document.open(); if (requ.getParameter("preview") == null) writer.addJavaScript("this.print(false);",false); document.add(new Chunk("Silent Auto Print")); document.close(); } catch (DocumentException e) { e.printStackTrace(); } resp.setContentType("application/pdf"); resp.setContentLength(baos.size()); baos.writeTo(out); out.flush(); break; } } } private void htmlHeader(ServletOutputStream out, HttpServletRequest requ, HttpServletResponse resp ) throws IOException { resp.setContentType("text/html; charset=ISO-8859-1"); resp.setHeader("Cache-Control", "no-cache"); out.println("<html>"); out.println("<head>"); out.println("<meta http-equiv='Content-Type' content='text/html;charset=iso-8859-1'>"); out.println("<meta http-equiv='expires' content='0'>"); out.println("<meta http-equiv='cache-control' content='no-cache'>"); out.println("<meta http-equiv='pragma' content='no-cache'>"); out.println("</head>"); out.println("<body>"); } private void formular(ServletOutputStream out, HttpServletRequest requ, HttpServletResponse resp, int sub ) throws IOException { out.print("<form method='post' action='"); out.print(requ.getRequestURI()); out.print("?action="); out.print(ACT_INIT); out.print("&sub="); out.println(ACT_REPORT_1); out.println("'>"); out.print("<input type='checkbox' name='preview' value='Y'"); if (requ.getParameter("preview") != null) out.print(" checked "); out.println(">preview<br>"); out.println("<input type=submit value='Report 1'>"); out.println("</form>"); if (sub != ACT_INIT) { if (requ.getParameter("preview") != null) { out.println("<script languate='JavaScript'>"); out.print("w = window.open(\""); out.print(requ.getRequestURI()); out.print("?action="); out.print(sub); out.print("&preview=Y\", \"Printing\", \"width=800,height=450,scrollbars,menubar=yes,resizable=yes\");"); out.println("</script>"); } else { out.print("<iframe src='"); out.print(requ.getRequestURI()); out.print("?action="); out.print(sub); out.println("' width='10' height='10' name='pdf_box'>"); } } out.println("</body>"); out.println("</html>"); }}⌨️ 快捷键说明
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