chart.js操作实例（前后台互通）
浏览数：42 /
时间：2015年06月09日
前提：需要导入chart.js
我的项目环境是：SpringMVC+mongodb
SpringMVC的controller层：
/**
* 查询得到财务信息报表
* @author liupeng
* @param request
* @return
* @throws UnknownHostException
* @throws ParseException
*/
@RequestMapping(value="/innerChartOutForFinal")
public ModelAndView innerChartOut(HttpServletRequest request) throws UnknownHostException, ParseException{
String timeStartemp = request.getParameter("timeStart")==null?"":request.getParameter("timeStart").toString();
String timeEndTemp = request.getParameter("timeEnd")==null?"":request.getParameter("timeEnd").toString();
String timeStart = getNextDate(timeStartemp, 0, Calendar.DATE, "yyyy-MM-dd");//获取当天
String timeEnd = getNextDate(timeEndTemp, 1, Calendar.DATE, "yyyy-MM-dd");//获取后一天
KeyRequestDao kqDao = new KeyRequestDao();
List<KeyRequest> list = kqDao.findByTimeForFinalCommon(timeStart, timeEnd);
SimpleDateFormat s1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat s2 = new SimpleDateFormat("yyyy-MM-dd");
Date tempDate =null;
String str = null;
//yyyy-MM-dd HH mm ss转换为yyyy-MM-dd
for (KeyRequest keyRequest : list) {
tempDate = s1.parse(keyRequest.getKqTimerStart());//将时间转换为Date类型
str = s2.format(s2.parse(s1.format(tempDate)));
keyRequest.setKqTimerStart(str);
}
//横坐标：时间
StringBuffer stringBufferX = new StringBuffer();
//纵坐标：财务应收金额和实际到账金额
StringBuffer stringBufferY1 = new StringBuffer();
StringBuffer stringBufferY2 = new StringBuffer();
String tempTime = list.get(0).getKqTimerStart();
int tempKqAutoSum = 0;
int tempKqAccountSum = 0;
for (int i=0;i<list.size();i++) {
KeyRequest keyRequest = list.get(i);
if (keyRequest.getKqTimerStart().equals(tempTime)) {
//应到账
tempKqAutoSum = tempKqAutoSum + Integer.parseInt(keyRequest.getKqAutoSum());
//实际到账
tempKqAccountSum = tempKqAccountSum + Integer.parseInt(keyRequest.getKqAccountSum()==""?"0":keyRequest.getKqAccountSum());
if (i==list.size()-1) {
stringBufferX.append("'"+tempTime+"'"); //必须拼凑成这种形式，在前台的JS中才能显示，这种形式的数据为'2014-08-12'
stringBufferX.append(",");
stringBufferY1.append(String.valueOf(tempKqAutoSum));
stringBufferY1.append(",");
stringBufferY2.append(String.valueOf(tempKqAccountSum));
stringBufferY2.append(",");
}
}else {
stringBufferX.append("'"+tempTime+"'");
stringBufferX.append(",");
stringBufferY1.append(String.valueOf(tempKqAutoSum));
stringBufferY1.append(",");
stringBufferY2.append(String.valueOf(tempKqAccountSum));
stringBufferY2.append(",");
tempTime = keyRequest.getKqTimerStart();
tempKqAutoSum = 0;
tempKqAccountSum = 0;
i--;
}
}
String strx = stringBufferX.toString();
String strY1 = stringBufferY1.toString();
String strY2 = stringBufferY2.toString();
System.out.println(strx);
System.out.println(strY1);
System.out.println(strY2);
request.setAttribute("strx", strx);
request.setAttribute("strY1", strY1);
request.setAttribute("strY2", strY2);
ModelAndView mv = new ModelAndView("/innerChart");
return mv;
/*
KeyRequestDao kqDao = new KeyRequestDao();
List<DBObject> list = kqDao.findByTimeForFinal(timeStart,timeEnd);
//横坐标：时间
StringBuffer stringBufferX = new StringBuffer();
//纵坐标：财务应收金额和实际到账金额
StringBuffer stringBufferY1 = new StringBuffer();
StringBuffer stringBufferY2 = new StringBuffer();
for(DBObject dbObject : list){
stringBufferX.append(dbObject.get("kq_timer_start"));
stringBufferX.append(",");
stringBufferY1.append(dbObject.get("kq_autosum"));
stringBufferY2.append(dbObject.get("kq_accountsum"));
}
String strY1[] = stringBufferY1.toString().split("_");
String strY2[] = stringBufferY2.toString().split("_");
System.out.println(stringBufferX);
System.out.println(strY1);
System.out.println(strY2);
*/
}
/**
* 此函数实现：给定日期和经过天数，算出结果日期
其中sDate为指定日期，iDate为多少时间段（可以是 年、月、日... 具体根据iCal来确定）
iCal为某种时间段例如 月：Calendar.MONTH（具体可查询api中Calendar类）
sStr为日期格式 例如："yyyyMMdd"（具体可查询api中Calendar类）
* @param sDate
* @param iDate
* @param iCal
* @param sStr
* @return
*/
public String getNextDate(String sDate, int iDate,int iCal, String sStr){
String sNextDate = "";
Calendar calendar = Calendar.getInstance();
SimpleDateFormat formatter = new SimpleDateFormat(sStr);
Date date = null;
try {
date = formatter.parse(sDate);
} catch (ParseException e) {
e.printStackTrace();
}
calendar.setTime(date);
calendar.add(iCal, iDate);
sNextDate = formatter.format(calendar.getTime());
return sNextDate ;
}SpringMVC的DAO层：
/**
* 根据时间范围获取全部信息
* @author liupeng
* @param timeStart
* @param timeEnd
*/
public List<KeyRequest> findByTimeForFinalCommon(String timeStart, String timeEnd) {
List<KeyRequest> kRList = new ArrayList<KeyRequest>();
BasicDBObject obj = new BasicDBObject();
obj.put("kq_timer_start",new BasicDBObject("$gte",timeStart).append("$lt", timeEnd));
try{
DBCursor dbCursor = keyRequest.find(obj).sort(new BasicDBObject("kq_timer_start",1));//以时间倒序排序，不排序的话数据会有问题，X坐标会显示相同的时间
List<DBObject> list = dbCursor.toArray();
for (DBObject dbObject:list) {
KeyRequest tmp = setKeyRequest(dbObject);
kRList.add(tmp);
}
}catch (Exception e) {
e.printStackTrace();
}
return kRList;
}SpringMVC的显示层：
<%
String strx = (String)request.getAttribute("strx");
String strY1 = (String)request.getAttribute("strY1");
String strY2 = (String)request.getAttribute("strY2");
//"January","February","March","April","May","June","July"
%>
<script>
var data = {
labels : [<%=strx%>],
datasets : [
{
//曲线的填充颜色
fillColor : "rgba(220,220,220,0.5)",
//填充块的边框线的颜色
strokeColor : "rgba(220,220,220,1)",
//表示数据的圆圈的颜色
pointColor : "rgba(220,220,220,1)",
//表示数据的圆圈的边的颜色
pointStrokeColor : "#fff",
data : [<%=strY1%>]
},
{
fillColor : "rgba(151,187,205,0.5)",
strokeColor : "rgba(151,187,205,1)",
pointColor : "rgba(151,187,205,1)",
pointStrokeColor : "#fff",
data : [<%=strY2%>]
}
]
};
var options = {
scaleOverride :false, //是否显示折线图的线条
scaleShowLabels :true,//是否显示纵轴
scaleShowGridLines :true,//是否显示坐标轴的标尺
bezierCurve :true,//是否显示圆滑的效果
pointDot :true,//是否显示折线图的顶点
pointDotRadius :3,//折线图定点大小
pointDotStrokeWidth:1,//折线图定点外围大小
animation :true,//是否显示动画效果
animationSteps :60,//图形显示的速度
};
var ctx = document.getElementById("bar").getContext("2d");
var myNewChart = new Chart(ctx).Line(data,options);
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