Forum Replies Created by munmun

Viewing 7 posts - 1 through 7 (of 7 total)
  • August 2, 2019 at 7:10 pm in reply to: datetime picker to dispaly a chart containing values from oracle database #26156

    munmun

    In this “Please take a look at this Sample Project.” as mentioned by you earlier , if I provide a string/date value in the code : a blank screen with no data comes . Data only in double format is picking up to render the chart which is not proper.
    String sql = ” SELECT * from Fan2TempMotorBearing where rownum < 50 order by datetime”;
    Statement stmt = conn.createStatement();
    ResultSet rset = stmt.executeQuery(sql);

    while (rset.next()) {
    Date xVal =rset.getDate(“datetime”);// Date values
    double y1Val = (double)rset.getDouble(“y_actual”), y2Val = (double)rset.getDouble(“y_predicted”);

    map = new HashMap<Object,Object>(); map.put(“x”, xVal); map.put(“y”, y1Val); list1.add(map);
    dataPoints1 = gsonObj.toJson(list1);

    map = new HashMap<Object,Object>(); map.put(“x”, xVal); map.put(“y”, y2Val); list2.add(map);
    dataPoints2 = gsonObj.toJson(list2);
    }
    }

    Query:
    create table Fan2TempMotorBearing (datetime date , y_actual float(50), y_predicted float(50))
    insert into Fan2TempMotorBearing values (TO_DATE(‘2018-07-01 00-00-00′,’yyyy-mm-dd hh24-mi-ss’),’50.183′,’53.0519169458035′)
    insert into Fan2TempMotorBearing values (TO_DATE(‘2018-07-01 00-05-00′,’yyyy-mm-dd hh24-mi-ss’),’50.183′,’53.0261445540871′)

    kindly check for this if possible why only double parameters can plot the graph from database and not string / date type data.

    August 2, 2019 at 8:22 am in reply to: datetime picker to dispaly a chart containing values from oracle database #26147

    munmun

    dear indranil

    Do you have a sample project with datetime picker attached to it. I have checked this sample but the issue is that it fetches data only for double values. if my x axis has string values or datetime values it does not produce the required output but gives a blank screen.

    July 25, 2019 at 6:09 pm in reply to: create multiseries chart #26038

    munmun

    This is not giving the desired output.

    July 25, 2019 at 6:08 pm in reply to: create multiseries chart #26037

    munmun

    I have mailed you already with my issue Manoj. Was not able to post the code here so pasted in jsfiddle.

    <%@ page import="java.util.*" %>
<%@ page import="java.sql.*" %>
<%@ page import="java.math.*" %>
<%@ page import="com.google.gson.Gson"%>
	
<%
Gson gsonObj = new Gson();
Map<Object,Object> map = null;
List<Map<Object,Object>> list1 = new ArrayList<Map<Object,Object>>(), list2 = new ArrayList<Map<Object,Object>>();
String dataPoints1 = null, dataPoints2 = null;

/* https://www.tutorialspoint.com/jdbc/jdbc-db-connections */
try {
   Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();   
}
catch(Exception ex) {
   System.out.println("Error!");
   System.exit(1);
}

String url = "jdbc:oracle:thin:@localhost:1521:xe";
String user = "SYS as SYSDBA";
String PASS = "SYS";
Connection conn = DriverManager.getConnection(url, user, PASS);


PreparedStatement pstmt = null;
try {
	String sql = "select * from shv order by datetime ";
	Statement stmt = conn.createStatement();
	ResultSet rset = stmt.executeQuery(sql);
	
	while (rset.next()) {
    String xVal = rset.getString("datetime"); 
	String y1Val = (String)rset.getString("y_actual");
	String y2Val = rset.getString("y_predicted");
		
		map = new HashMap<Object,Object>(); 
		map.put("x", xVal); 
		map.put("y", y1Val); 
		list1.add(map);
		dataPoints1 = gsonObj.toJson(list1);
		//Date dt=new Date(dataPoints1);
	
		
		map = new HashMap<Object,Object>(); map.put("x", xVal); map.put("y", y2Val); list2.add(map);
		dataPoints2 = gsonObj.toJson(list2);
	}
}
catch (SQLException e) {
   System.out.println(e);
}

%>

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="https://cdn.canvasjs.com/canvasjs.min.js"></script>
<script type="text/javascript">
window.onload = function(){
	var chart = new CanvasJS.Chart("chartContainer", {
		theme: "light2",
		animationEnabled: true,
		title: {
			text: "Multiseries line Chart with Data from Oracle Database"
		},
		
		data: [{
			type: "line", //change type to bar, line, area, pie, etc
			dataPoints: <%out.print(dataPoints1);%>
		},{
			type: "line", //change type to bar, line, area, pie, etc
			dataPoints: <%out.print(dataPoints2);%>
		}]
	});
	chart.render();
	
	function toogleDataSeries(e){
		if (typeof(e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
			e.dataSeries.visible = false;
		} else{
			e.dataSeries.visible = true;
		}
		chart.render();
	}
}
</script>
	
</head>
<body>
	<div id="chartContainer" style="width: 100%; height: 400px"></div>	
</body>
</html>
    July 17, 2019 at 6:12 pm in reply to: create multiseries chart #25943

    munmun

    https://jsfiddle.net/munmunpanda/82Luwp9z/3/

    This is a jsfiddle link where in html i have placed my entire code and in javascript section i have placed the queries that i m running currently.

    As per your instructions i ran the sample project but got a blank screen . kindly reply soon.

    July 17, 2019 at 5:52 pm in reply to: create multiseries chart #25940

    munmun

    hi manoj

    July 16, 2019 at 7:01 am in reply to: create multiseries chart #25902

    munmun

    i want to create using java by using hashmap or arraylist a multiseries chart from data from database . oracle database.

Viewing 7 posts - 1 through 7 (of 7 total)