fusionchartfree 教程

/* * Created on Oct 25, 2006 * */ package com.infosoftglobal.fusioncharts; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import javax.servlet.http.HttpServletResponse; /** * Contains methods to add no cache string to a url,getting colors for the charts.<br> * This class can be used to create chart xml given the swf filename and other<br> * parameters.<br> * In order to use this class in your jsps,import this class and<br> * call the appropriate method directly as follows:<br> * FusionChartsHelper.addCacheToDataURL(...);<br> * In order to use this class for colors call the method as shown:<br> * FusionChartsHelper helper = new FusionChartsHelper();<BR> * String color = helper.getFCColor();<BR> * @author InfoSoft Global (P) Ltd. */ public class FusionChartsHelper { /*This page contains an array of colors to be used as default set of colors for FusionCharts 'arr_FCColors is the array that would contain the hex code of colors 'ALL COLORS HEX CODES TO BE USED WITHOUT #*/ //We also initiate a counter variable to help us cyclically rotate through //the array of colors. int FC_ColorCounter=0; String[] arr_FCColors = new String[]{ "1941A5", "AFD8F8", "F6BD0F", "8BBA00", "A66EDD", "F984A1", "CCCC00", "999999", "0099CC", "FF0000", "006F00", "0099FF", "FF66CC", "669966", "7C7CB4", "FF9933", "9900FF", "99FFCC", "CCCCFF", "669900", }; /* "1941A5"; //Dark Blue "CCCC00"; //Chrome Yellow+Green "999999"; //Grey "0099CC"; //Blue Shade "FF0000"; //Bright Red "006F00"; //Dark Green "0099FF"; //Blue (Light) "FF66CC"; //Dark Pink "669966"; //Dirty green "7C7CB4"; //Violet shade of blue "FF9933"; //Orange "9900FF"; //Violet "99FFCC";//Blue+Green Light "CCCCFF"; //Light violet "669900"; //Shade of green */ //getFCColor method helps return a color from arr_FCColors array. It uses //cyclic iteration to return a color from a given index. The index value is //maintained in FC_ColorCounter public String getFCColor() { //Update index FC_ColorCounter += 1; //Return color return arr_FCColors[FC_ColorCounter % arr_FCColors.length]; } /** * Adds additional string to the url to and encodes the parameters,<br> * so as to disable caching of data.<br> * @param strDataURL - * dataURL to be fed to chart * @return cachedURL - URL with the additional string added */ public static String addCacheToDataURL(String strDataURL) { String cachedURL = strDataURL; // Add the no-cache string if required // We add ?FCCurrTime=xxyyzz // If the dataURL already contains a ?, we add &FCCurrTime=xxyyzz // We replace : with _, as FusionCharts cannot handle : in URLs Calendar nowCal = Calendar.getInstance(); Date now = nowCal.getTime(); SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH_mm_ss a"); String strNow = sdf.format(now); try { if (strDataURL.indexOf("?") > 0) { cachedURL = strDataURL + "&FCCurrTime=" + URLEncoder.encode(strNow, "UTF-8"); } else { cachedURL = strDataURL + "?FCCurrTime=" + URLEncoder.encode(strNow, "UTF-8"); } } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); cachedURL = strDataURL + "?FCCurrTime=" + strNow; } return cachedURL; } /** * Encodes the dataURL before it's served to FusionCharts. * If you have parameters in your dataURL, you necessarily need to encode it. * @param strDataURL - dataURL to be fed to chart * @param addNoCacheStr - Whether to add additional string to URL to disable caching of data * @return String - the encoded URL */ public String encodeDataURL(String strDataURL, String addNoCacheStr, HttpServletResponse response) { String encodedURL = strDataURL; //Add the no-cache string if required if (addNoCacheStr.equals("true")) { /*We add ?FCCurrTime=xxyyzz If the dataURL already contains a ?, we add &FCCurrTime=xxyyzz We send the date separated with '_', instead of the usual ':' as FusionCharts cannot handle : in URLs */ java.util.Calendar nowCal = java.util.Calendar.getInstance(); java.util.Date now = nowCal.getTime(); java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat( "MM/dd/yyyy HH_mm_ss a"); String strNow = sdf.format(now); if (strDataURL.indexOf("?") > 0) { encodedURL = strDataURL + "&FCCurrTime=" + strNow; } else { strDataURL = strDataURL + "?FCCurrTime=" + strNow; } encodedURL = response.encodeURL(strDataURL); } return encodedURL; } }