how to print barcode in crystal report using vb.net The JSP Price Quote Server in Java

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The JSP Price Quote Server
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Because the price quote request is different every time, LyricNotecom cannot simply return a static XML document Rather, it uses a JSP page to generate XML on the fly from the results of a database search The JSP page (PriceQuotejsp) is listed here:
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page session="false" import="javasql*,javatext*" contentType="text/xml"
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%><% // Define constants for JDBC driver name and // database URL String DRIVER = "orgenhydrainstantdbjdbcidbDriver"; String DB_URL = "jdbc:idb:" + "D:/lyricnote/WEB-INF/database/products/dbprp"; // Get the product search argument and desired quantity String product = requestgetParameter("product"); if (product == null) throw new ServletException("No product specified"); String qstring = requestgetParameter("quantity"); if (qstring == null) throw new ServletException("No quantity specified"); int quantity = 0; try { quantity = IntegerparseInt(qstring); } catch (NumberFormatException e) { throw new ServletException("Quantity not numeric"); } // Load the driver ClassforName(DRIVER); // Create a connection Connection con = null; try { con = DriverManagergetConnection(DB_URL); // Create a select statement PreparedStatement pstmt = conprepareStatement
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( " + " + " + " + " ); select from where and and itemcode, price, description" products" prodtype = 'IN'" description like " onhand >= "
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// Supply values for substitution parameters pstmtsetString(1, "%" + product + "%"); pstmtsetInt(2, quantity); // Execute the query ResultSet rs = pstmtexecuteQuery(); // Create the XML %>< xml version="10" > <price-quote> <supplier>LyricNotecom</supplier> <date><%= new SimpleDateFormat("yyyy-MM-dd") format(new javautilDate()) %></date> <% while (rsnext()) { String itemCode = rsgetString(1); double price = rsgetDouble(2) / 100; String description = rsgetString(3); %> <item code="<%= itemCode %>" price="<%= new DecimalFormat("###00")format(price) %>" description="<%= description %>"/> <% } %></price-quote><% } finally { if (con != null) conclose();
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} %>
The JSP page extracts the product search argument and desired quantity from request parameters, and then opens a database connection to the LyricNote product database and searches for matching items The results are written as XML The odd indentation scheme (with back-to-back delimiters in %><% and %></price-quote>%<) is used to prevent newline characters or other extraneous whitespace from being written to the output stream A later example in this chapter shows another technique that can be used to accomplish this
The Price Quote Client Application
We consider only a simplified version of the client Java application one that illustrates how to make the connection, not what to do with the data
import javaio*; import javanet*; /** * An example of a Java application that acts as a JSP client */ public class PriceQuoteReader { public static void main(String[] args) { // Define the supplier URL and the two search arguments // These are hard-coded for the purposes of this example String supplier = "http://wwwlyricnotecom/PriceQuotejsp"; String product = "Clarinet"; int quantity = 3; // Append the search arguments to the URL so that // they will be recognized as parameters to an // HTTP GET request StringBuffer sb = new StringBuffer(); sbappend(supplier); sbappend(" product=");
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sbappend(URLEncoderencode(product)); sbappend("&quantity="); sbappend(URLEncoderencode(StringvalueOf(quantity))); String supplierURL = sbtoString(); try { // Now create the URL instance URL url = new URL(supplierURL); // and open its input stream InputStream stream = urlopenStream(); // // // // Read each line of the XML that is returned All this example does it print the results; the real application would do something more useful
BufferedReader in = new BufferedReader( new InputStreamReader(stream)); while (true) { String line = inreadLine(); if (line == null) break; Systemoutprintln(line); } inclose(); } catch (IOException e) { eprintStackTrace(); } } }
PriceQuoteReader uses hard-coded values for the supplier URL, the product search string, and the requested quantity It creates a URL that includes the search string and quantity as request parameters, and then calls URLopenStream() to
20:
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initiate the connection It then reads and prints the resulting XML document, shown here:
< xml version="10" > <price-quote> <supplier>LyricNotecom</supplier> <date>2001-01-25</date> <item code="001130" price="36900" description="Wendecker B Flat Clarinet"/> <item code="001140" price="52200" description="Clemens-Altman B Flat Clarinet - Wood"/> <item code="001150" price="41700" description="Gabriel E Flat Clarinet - Wood"/> <item code="001160" price="54800" description="Wendecker B Flat Bass Clarinet"/> <item code="001170" price="30700" description="Clemens-Altman E Flat Clarinet"/> </price-quote>
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