上一篇讲的是在web前端中在jsp嵌入使用ajax技术实现局部刷新的目的,运用的是windows一个公共xmlhttprequest对象,这一篇讲的是如何实现服务器端servlet
首先,servlet-mapping中可以看到servlet类名应该是GetBusinformation
<servlet-mapping>
<servlet-name>GetBusinformation</servlet-name>
<url-pattern>/GetBusinformation</url-pattern>
</servlet-mapping>
所以创建了一个GetBusinformation类:
public class GetBusinformation extends HttpServlet
在这个类中接收”POST”或”GET”响应:
protected void doGet(HttpServletRequest request,HttpServletResponse response)
throws servletexception,IOException{
processRequest(request,response,"GET");
//String x=request.getParameter("name1");
}
protected void doPost(HttpServletRequest request,"POST");
//String b=request.getParameter(name)
}
protected void processRequest(HttpServletRequest request,HttpServletResponse response,String method)throws servletexception,IOException{
response.setContentType("text/xml");
String c=request.getParameter("timeStamp");
getData();
String xml;
xml=createXML();
response.setContentType("text/xml");
PrintWriter out=response.getWriter();
out.write(xml);
out.close();
}
至于xml文件时如何创建的可以参考以下:
public String createXML(){
String xmlFile="<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
xmlFile=xmlFile+" <AllBusInfo>\n";
xmlFile=xmlFile+" <Locates>\n";
for(int i=0;i<busNumber;i++){
xmlFile=xmlFile+" <Location>\n";
xmlFile=xmlFile+" <gpsinfoID>"+locate[i].getGpsinfoID()+"</gpsinfoID>\n";
xmlFile=xmlFile+" <busID>"+locate[i].getBusID()+"</busID>\n";
String timeValue=locate[i].getHour()+":"+locate[i].getMinute()+":"+locate[i].getSecond();
xmlFile=xmlFile+" <time>"+timeValue+"</time>\n";
xmlFile=xmlFile+" <status>"+locate[i].getStatus()+"</status>\n";
xmlFile=xmlFile+" <latitude>"+locate[i].getLatitude()+"</latitude>\n";
xmlFile=xmlFile+" <latitude_sphere>"+locate[i].getLatitude_sphere()+"</latitude_sphere>\n";
xmlFile=xmlFile+" <longtitude>"+locate[i].getLongtitude()+"</longtitude>\n";
xmlFile=xmlFile+" <longtitude_sphere>"+locate[i].getLongtitude_sphere()+"</longtitude_sphere>\n";
xmlFile=xmlFile+" <speed>"+locate[i].getSpeed()+"</speed>\n";
xmlFile=xmlFile+" <direction>"+locate[i].getDirection()+"</direction>\n";
String dateValue=locate[i].getYear()+"-"+locate[i].getMonth()+"-"+locate[i].getDay();
xmlFile=xmlFile+" <date>"+dateValue+"</date>\n";
xmlFile=xmlFile+" </Location>\n";
}
xmlFile=xmlFile+" </Locates>\n";
xmlFile=xmlFile+" </AllBusInfo>\n";
return xmlFile;
}
原文地址:https://www.jb51.cc/ajax/163446.html
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