WebStart JNLP参数传递

通过WebStart 启动打开JNLP文件，虽说可以通过url在浏览器中直接打开，但其中参数的传递该如何弄呢？

有两种方法：

1.修改WebStart源码

   需修改jnlp.sample.servlet.JnlpFileHandler.java中的specializeJnlpTemplate 方法

原方法为：

private String specializeJnlpTemplate( HttpServletRequest request, String respath, String jnlpTemplate, Stack<Long> timeStack ) throws ErrorResponseException    {    System.out.println("JnlpFileHandler.specializeJnlpTemplate() jnlpTemplate:" + jnlpTemplate);    System.out.println("request.getParameter(\"ticket\"):" + request.getParameter("ticket"));        String urlprefix = getUrlPrefix( request );        int idx = respath.lastIndexOf( '/' ); //        String name = respath.substring( idx + 1 );    // Exclude /        String codebase = respath.substring( 0, idx + 1 ); // Include /        jnlpTemplate = substitute( jnlpTemplate, "$$name", name );        jnlpTemplate = substitute( jnlpTemplate, "$$codebase", urlprefix + request.getContextPath() + codebase );        jnlpTemplate = substitute( jnlpTemplate, "$$hostname", request.getServerName() );        jnlpTemplate = substitute( jnlpTemplate, "$$context", urlprefix + request.getContextPath() );        jnlpTemplate = substitute( jnlpTemplate, "$$site", urlprefix );                ……        return jnlpTemplate;    }

如传递ticket参数，修改后：

private String specializeJnlpTemplate( HttpServletRequest request, String respath, String jnlpTemplate, Stack<Long> timeStack ) throws ErrorResponseException    {    System.out.println("JnlpFileHandler.specializeJnlpTemplate() jnlpTemplate:" + jnlpTemplate);    System.out.println("request.getParameter(\"ticket\"):" + request.getParameter("ticket"));        String urlprefix = getUrlPrefix( request );        int idx = respath.lastIndexOf( '/' ); //        String name = respath.substring( idx + 1 );    // Exclude /        String codebase = respath.substring( 0, idx + 1 ); // Include /        jnlpTemplate = substitute( jnlpTemplate, "$$name", name );        jnlpTemplate = substitute( jnlpTemplate, "$$codebase", urlprefix + request.getContextPath() + codebase );        jnlpTemplate = substitute( jnlpTemplate, "$$hostname", request.getServerName() );        jnlpTemplate = substitute( jnlpTemplate, "$$context", urlprefix + request.getContextPath() );        jnlpTemplate = substitute( jnlpTemplate, "$$site", urlprefix );        if(null != request.getParameter("ticket") && !"".equals(request.getParameter("ticket"))) {        jnlpTemplate = substitute( jnlpTemplate, "$$ticket", request.getParameter("ticket") );        System.out.println("request ticket:" + request.getParameter("ticket"));        }               ……        return jnlpTemplate;    }

2.使用Sevlet或jsp文件方式动态生成JNLP文件，然后直接输出到浏览器。

import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.nio.charset.Charset;import java.util.ArrayList;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * 生成JNLP文件内容 * @author xcbeyond * 2017-7-20上午09:19:06 */public class PrintJnlpFileServlet extends HttpServlet{private static final long serialVersionUID = 2476758371307727115L;@Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse resp)throws ServletException, IOException {//设置文件编码格式为utf-8resp.setCharacterEncoding("utf-8");//禁止浏览器和webstart缓存jnlp内容resp.setHeader("Pragma", "no-cache");resp.setHeader("Expires", "0");//给定动态文件名resp.setHeader("Content-Disposition", "filename=\"dynamic.jnlp\";");//设置文件类型为jnlp文件类型resp.setContentType("application/x-java-jnlp-file");                PrintWriter pw = resp.getWriter();         pw.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");    pw.println("<jnlp spec=\"1.6+\" codebase=\"http://localhost:8080/\" href=\"\">");    pw.println("<information>");    ……        pw.println("    <application-desc main-class=\"org.apache.pivot.wtk.DesktopApplicationContext\">");    ……    pw.println("<argument>--ticket=" + request.getParameter("ticket") + "</argument>");    pw.println("    </application-desc>");    pw.println("</jnlp>");               pw.flush();        pw.close(); }@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {super.doPost(req, resp);}}