ajax从服务器请求事件

1、在web.xml配置路径：

  <servlet>
    <servlet-name>delRecord</servlet-name>//servlet的名字
    <servlet-class>com.record.web.DelRcd</servlet-class>//class文件所在的位置和名字
  </servlet>
  
  <servlet-mapping>
    <servlet-name>delRecord</servlet-name>
    <url-pattern>/delRecord</url-pattern>//servlet的路径
  </servlet-mapping>

2、jsp写ajax请求事件：

function delrecord(recordid){//alert(recordid);
jQuery.ajax( {  
        type : 'get',  //get
        contentType : 'application/json',  
        url : '<%=path%>/delRecord?rid='+recordid,//路径
data : {},
dataType : 'json',
success : function(data) {
},
error : function(data) {
//alert("b");
}
});
}

3、服务器端doget方法：

public class DelRcd extends HttpServlet implements Servlet{
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String recordId = req.getParameter("rid");
System.out.println(RecordConfig.WEB_ROOT+recordId);
File file = new File(RecordConfig.WEB_ROOT+recordId);
file.delete();
}
}