echarts请求流量分析统计
项目知识
Echarts
ajax
Json
Jquery
监听器ServletContextListener,ServletRequestListener
项目收获
时间格式化
Date date=new Date();
SimpleDateFormat sdf= new SimpleDateFormat(“HH:mm”);
String time=sdf.format(date);
入门echarts(直接搜便可)图标展现echarts.min.js
项目步骤
一.创建监听器类ServletContextListener,ServletRequestLostener。(配置
包名.类名
)
在ServletContextListener中存入两个List(timeList,valueList),存入ServletContext
在ServletRequestListener中
//将/rt排出请求统计范围内
HttpServletRequest request=(HttpServletRequest)sre.getServletRequest();
String url=request.getRequestURL().toString();
If(url.endsWith(“/rt”)==ture){
Return;
}endswith()当前字符串是以。。。结尾的
List timeList=(List)sre.getServletContext().getAttribute(“timeList”);和valueList
Date date=new Date();
SimpleDateFormat sdf=new SimpleDateFormat(“HH:mm”);
String time=sdf.format(date);
If(timeList.indexOf(time)==-1){
timeList.add(time);
valueList.add(1);
Sre.getServletContext().setAttribute(“timeList”,timeList);
Sre.getServletContext().setAttribute(“valueList”,valueList);
}else{
Int index=timeList.indexOf(time);
Int value=valueList.get(index);
valueList.set(index,value+1);
Sre.getServletContext().setAttribute(“valueList”,valueList);
}
二.建立3个页面.html
建立RequestTotalServlet类,接收ServletContext的timeList,valueList。
Response.setContentType(“text/html;charset=utf-8”);
Map result=new HashMap();
Result.put(“timeList”,timeList);
Result.put(“valueList”,timeList);
String json=JSON.toJSONString(result);
Response.getWriter().println(json);
三.写ajax和echarts
导入jquery和echarts.min.js
}
})
}
Window.setInterval(“showChart()”,1000);
本文地址:https://blog.csdn.net/weixin_46176142/article/details/107279723
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