ajax应用实现(续)
发布时间:2020-12-16 02:01:20 所属栏目:百科 来源:网络整理
导读: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 G
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 <servlet-mapping>
<servlet-name>GetBusInformation</servlet-name>
<url-pattern>/GetBusInformation</url-pattern>
</servlet-mapping>
所以创建了一个GetBusInformation类: 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)
}
响应请求创建xml文件并发送给客户端 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;
}
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