动态生成JNLP并用URL传递参数

如果web应用和C/S程序产生交互，在界面上最简单的处理办法就是通过URL来传递参数，但是参数必须要定义到JNLP文件的<argument/>里面去才行，如果想传递参数，就必须用servlet来生成JNLP文件。

首先，创建一个servlet来生成JNLP，类MakeJnlpServlet

java 代码

public class MakeJnlpServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String parameter1 = request.getParameter("soNbr");

        String protocol = request.getScheme();
        String ip = request.getServerName();
        int port = request.getServerPort();
        String app = request.getContextPath();
        String href = "rmsInterface";

        response.setContentType("application/x-java-jnlp-file");
        PrintWriter out = response.getWriter();
        out.println("<?xml version=\"1.0\" encoding=\"GBK\"?>");
        out.println("<jnlp spec=\"1.0+\" codebase=\"" + protocol + "://" + ip
                + ":" + port + "/" + app + "\" href=\""+href+"\">");

        out.println("<information>");
        out.println("  <title>rms</title>");
        out.println("  <vendor>cattsoft</vendor>");
        out.println("  <homepage href=\"index.html\"/>");
        out.println("  <description>Web Start Version</description>");
        out.println("  <description kind=\"short\">Web Start Version</description>");
        out.println("</information>");
        out.println("<security>");
        out.println("  <all-permissions/>");
        out.println("</security>");
        out.println("<resources>");
        out.println("  <j2se version=\"1.5+\"/>");
        out.println("  <jar href=\"trmsEJBClient-genkey.jar\"/>");
        out.println("  <jar href=\"rms_Lib-genkey.jar\"/>");
        out.println("  <jar href=\"weblogic-genkey.jar\"/>");
        out.println("</resources>");

        out.println("<application-desc main-class=\"oss.rms.app.provision.rm.swing.view.main.SoView\">");
        out.println("<argument>"+ parameter1 +"</argument>");
        out.println("</application-desc>");

        out.println("</jnlp>");
        out.flush();
        out.close();

    }
}

其中，String parameter1 = request.getParameter("soNbr");是接收传递过来的参数。
out.println("<argument>"+ parameter1 +"</argument>"); 是把参数作为webstart的参数。
String href = "rmsInterface"; 这个是此serlvet的URI

然后web.xml中声明一下，

<servlet>
         <servlet-name>RmsInterface</servlet-name>
         <servlet-class>oss.rms.exinterface.MakeJnlpServlet</servlet-class>
         <load-on-startup>1</load-on-startup>
   </servlet>

<servlet-mapping>
    <servlet-name>RmsInterface</servlet-name>
    <url-pattern>/rmsInterface</url-pattern>
</servlet-mapping>

<mime-mapping>
    <extension>jnlp</extension>
    <mime-type>application/x-java-jnlp-file</mime-type>
</mime-mapping>

 然后当ear部署好以后，就可以通过URI?soNbr=xx来传递参数了。

在UI端接受参数也很简单，获取main函数的args就可以了，如：

 

java 代码

String parameter1 = "";
try {
    parameter1 = args[0];
} catch(Exception e) {
    e.printStackTrace();
    System.out.println("接收参数异常");
}

xml 代码