Pass Parameter from JavaScript to JSP : JavaScript JSP « JSP « Java Tutorial

index.html

<HTML>
    <HEAD>
    </HEAD>

    <BODY>
        <DIV STYLE="POSITION:ABSOLUTE; LEFT:10; TOP:10; WIDTH:480; HEIGHT:400; 
        BACKGROUND-COLOR:BLACK;"></DIV>
    </BODY>
        <SCRIPT>
            <!--

                var outString = "basic.jsp?x1=" + 10
                    outString += "&y1=" + 10
                    outString += "&x2=" + 100
                    outString += "&y2=" + 100
                    location.href = outString

            // -->
        </SCRIPT>
</HTML>

basic.jsp

<%@ page contentType="image/jpeg" import="java.io.*, java.awt.*, java.awt.image.*,com.sun.image.codec.jpeg.*" %>
<%
    try {

        int x1 = Integer.parseInt(request.getParameter("x1"));
        int y1 = Integer.parseInt(request.getParameter("y1"));
        int x2 = Integer.parseInt(request.getParameter("x2"));
        int y2 = Integer.parseInt(request.getParameter("y2"));

        BufferedImage image = new BufferedImage(480, 400, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = image.createGraphics();
        g.drawLine(x1, y1, x2, y2);

        JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(response.getOutputStream());
        encoder.encode(image);

    } catch (Exception e) {}
%>

Download: PassParameterFromJavaScriptToJSP.zip( 1 k)

23.45.JavaScript JSP
	23.45.1.	Pass Parameter from JavaScript to JSP