📄 forecast.jsp
字号:
<%@ page contentType="image/jpeg" import="java.io.*, java.awt.*, java.awt.image.*,java.net.*,com.sun.image.codec.jpeg.*" %>
<%
Cookie[] cookies = request.getCookies();
boolean foundCookie = false;
String zip = "";
if(request.getParameter("zip") != null){
zip = request.getParameter("zip");
drawImage(zip, response);
return;
}
if(cookies != null){
for(int loopIndex = 0; loopIndex < cookies.length; loopIndex++)
{
Cookie cookie1 = cookies[loopIndex];
if (cookie1.getName().equals("zipCookie")) {
zip = cookie1.getValue();
foundCookie = true;
}
}
}
if (!foundCookie) {
if(request.getParameter("textField") != null){
Cookie cookie1 = new Cookie("zipCookie",
request.getParameter("textField"));
cookie1.setMaxAge(365 * 24 * 60 * 60);
response.addCookie(cookie1);
drawImage(request.getParameter("textField"), response);
}
else{
%>
<HTML>
<HEAD>
<META HTTP-EQUIV="Expires" CONTENT="-1">
<TITLE>
Forecaster
</TITLE>
</HEAD>
<BODY>
<H1>
Forecaster
</H1>
<FORM NAME="form1" METHOD="POST">
Please enter your five-digit zip code:
<INPUT TYPE="TEXT" NAME="textField"></INPUT>
<BR>
<BR>
<INPUT TYPE="SUBMIT" VALUE="Submit">
</FORM>
</BODY>
</HTML>
<%
}
}
else{
drawImage(zip, response);
}
%>
<%!
public void drawImage(String zip, HttpServletResponse response)
{
String hiTemperature[] = new String[4];
String loTemperature[] = new String[4];
try {
int character;
URL url = new URL
("http://www.srh.noaa.gov/zipcity.php?inputstring="
+ zip);
URLConnection urlconnection = url.openConnection();
InputStream in = urlconnection.getInputStream();
String input = "";
String hiSearch;
String loSearch;
String inchar;
char[] cc = new char[1];
while ((character = in.read()) != -1) {
char z = (char)character;
cc[0] = z;
inchar = new String(cc);
input += inchar;
}
in.close();
if(input.indexOf("Hi <font color=\"#FF0000\">") >= 0){
hiSearch = "Hi <font color=\"#FF0000\">";
}
else{
hiSearch= "Hi: <span class=\"red\">";
}
int currentPosition = 0;
for(int loopIndex = 0; loopIndex < 4; loopIndex++){
int location = input.indexOf(hiSearch,
currentPosition);
int end = input.indexOf("°", location);
hiTemperature[loopIndex] = input.substring(location +
hiSearch.length(), end);
currentPosition = end + 1;
}
if(input.indexOf("Lo <font color=\"#0033CC\">") >= 0){
loSearch = "Lo <font color=\"#0033CC\">";
}
else{
loSearch= "Lo: <span class=\"blue\">";
}
currentPosition = 0;
for(int loopIndex = 0; loopIndex < 4; loopIndex++){
int location = input.indexOf(loSearch,
currentPosition);
int end = input.indexOf("°", location);
loTemperature[loopIndex] = input.substring(location +
loSearch.length(), end);
currentPosition = end + 1;
}
boolean evening = false;
if(input.indexOf(loSearch) < input.indexOf(hiSearch)){
evening = true;
hiTemperature[3] = hiTemperature[2];
hiTemperature[2] = hiTemperature[1];
hiTemperature[1] = hiTemperature[0];
}
BufferedImage image = new BufferedImage(225, 201,
BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, 224, 201);
g.setColor(Color.gray);
for(int loopIndex = 0; loopIndex < 21; loopIndex++){
g.drawLine(25, loopIndex * 10, 224, loopIndex * 10);
g.drawLine(loopIndex * 10 + 25, 0, loopIndex * 10
+ 25, 199);
}
g.setColor(Color.blue);
Font font = new Font("Courier", Font.PLAIN, 18);
g.setFont(font);
for(int loopIndex = 20; loopIndex < 200; loopIndex += 20){
g.drawString(String.valueOf(100 - loopIndex / 2), 0,
loopIndex + 5);
}
g.setColor(Color.red);
if(!evening){
g.drawOval(65 - 4, 200 - (Integer.parseInt(
hiTemperature[0]) * 2) - 4, 8, 8);
}
g.drawOval(105 - 4, 200 - (Integer.parseInt(hiTemperature[1]) *
2) - 4, 8, 8);
g.drawOval(145 - 4, 200 - (Integer.parseInt(hiTemperature[2]) *
2) - 4, 8, 8);
g.drawOval(185 - 4, 200 - (Integer.parseInt(hiTemperature[3]) *
2) - 4, 8, 8);
if(!evening){
g.drawLine(65, 200 - (Integer.parseInt(
hiTemperature[0]) * 2), 105, 200 -
(Integer.parseInt(hiTemperature[1]) * 2));
}
g.drawLine(105, 200 - (Integer.parseInt(hiTemperature[1]) * 2),
145, 200 - (Integer.parseInt(hiTemperature[2]) * 2));
g.drawLine(145, 200 - (Integer.parseInt(hiTemperature[2]) * 2),
185, 200 - (Integer.parseInt(hiTemperature[3]) * 2));
g.setColor(Color.blue);
g.drawOval(65 - 4, 200 - (Integer.parseInt(loTemperature[0]) *
2) - 4, 8, 8);
g.drawOval(105 - 4, 200 - (Integer.parseInt(loTemperature[1]) *
2) - 4, 8, 8);
g.drawOval(145 - 4, 200 - (Integer.parseInt(loTemperature[2]) *
2) - 4, 8, 8);
g.drawOval(185 - 4, 200 - (Integer.parseInt(loTemperature[3]) *
2) - 4, 8, 8);
g.drawLine(65, 200 - (Integer.parseInt(loTemperature[0]) * 2),
105, 200 - (Integer.parseInt(loTemperature[1]) * 2));
g.drawLine(105, 200 - (Integer.parseInt(loTemperature[1]) * 2),
145, 200 - (Integer.parseInt(loTemperature[2]) * 2));
g.drawLine(145, 200 - (Integer.parseInt(loTemperature[2]) * 2),
185, 200 - (Integer.parseInt(loTemperature[3]) * 2));
g.setColor(Color.white);
g.fillRect(55, 160, 140, 30);
g.setColor(Color.blue);
g.drawRect(55, 160, 140, 30);
font = new Font("Courier", Font.PLAIN, 12);
g.setFont(font);
g.drawString("Four-Day Forecast", 65, 172);
font = new Font("Courier", Font.PLAIN, 9);
g.setFont(font);
g.drawString("Source: Nat. Weather Srvce.", 58, 185);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder
(response.getOutputStream());
encoder.encode(image);
}
catch (Exception e) {
System.out.println(e.getMessage());
}
}
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