使用fusioncharts实现数据库的动态数据交互

先简单介绍一下FusionCharts，这是一款动态的制作报表的工具，主要通过XML数据和SWF文件进行交互，实现类似于flash的非常漂亮的报表。下面就做一个Demo，简要介绍一下啊fusioncharts的功能，以及如何实现一个完整动态数据的交互。
首先下载FusionCharts的官方API发布包，我做这个例子的时候是V3.1下载后，在MyEclipse下新建一个Web工程。然后将发布包中的Charts文件夹拷贝到WebRoot下，这里面都是我们接下来要做图的时候用到的一些swf文件。接着还需要一个JS文件，是JSClass文件夹下的FusionCharts.js文件，将它拷贝到WebRoot下的ChartsJs文件夹下。由于我这个项目是结合struts1还有spring加上JPA做的。所以大家先有个基本的认识。然后在WEB-INF下建立两个目录，一个叫fusion、一个叫common，等会我们会用到。找到发布包的\Code\JSP\Includes目录下，将FusionCharts.jsp文件拷贝到common文件夹下。
准备环境完成了，那么我们下面就开始做了。
首先说我想做什么内容。主要是展示2004、2005、2006、2007四年的一个油品的销售统计，用柱状图来表示，然后点击每一个柱子，会在右边显示出饼状的上半年的各个月份的销售比例。
首先建立实体Bean，代码如下

import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import com.zxyg.bean.orgnization.Employee;

/**
* 年销售统计
* @author Lan
*
*/
@Entity
@Table(name = "t_yearunits")
public class YearUnits {
private Integer id;
private String year;
private Float units;

private Set<MonthUnits> months = new HashSet<MonthUnits>();

@OneToMany(mappedBy="year", cascade=CascadeType.REFRESH)
public Set<MonthUnits> getMonths() {
return months;
}

public void setMonths(Set<MonthUnits> months) {
this.months = months;
}

@Id @GeneratedValue
public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

@Column(length=4, nullable=false)
public String getYear() {
return year;
}

public void setYear(String year) {
this.year = year;
}

@Column(length=5, nullable=false)
public Float getUnits() {
return units;
}

public void setUnits(Float units) {
this.units = units;
}

}

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

/**
* 月销售统计
* @author Lan
*
*/
@Entity
@Table(name = "t_monthunits")
public class MonthUnits {
private Integer id;
private String month;
private Float units;

private YearUnits year;

@ManyToOne(cascade=CascadeType.REFRESH)
@JoinColumn(name="year_id")
public YearUnits getYear() {
return year;
}

public void setYear(YearUnits year) {
this.year = year;
}

@Id @GeneratedValue
public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

@Column(length=4, nullable=false)
public String getMonth() {
return month;
}

public void setMonth(String month) {
this.month = month;
}

@Column(length=5, nullable=false)
public Float getUnits() {
return units;
}

public void setUnits(Float units) {
this.units = units;
}
}

这分别是年销售统计和月销售统计的实体Bean
由于Service层的东西都在底层封装好了，所以建立好表后，手动添加一些数据就好了。
接下来是Action层的代码，首先是针对年销售突击的Action的代码

import java.io.PrintWriter;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import org.springframework.stereotype.Controller;

import com.zxyg.bean.report.MonthUnits;
import com.zxyg.bean.report.YearUnits;
import com.zxyg.service.report.MonthUnitsService;
import com.zxyg.service.report.YearUnitsService;

/**
* 年销售统计图表
* @author Lan
*
*/
@Controller("/year/units/report")
public class YearUnitsAction extends Action {
@Resource private YearUnitsService yearUnitsService;

public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//年销售统计
StringBuilder strXML1 = new StringBuilder("");
strXML1.append("<?xml version='1.0' encoding='GBK'?><chart palette='2' maxColWidth='70' rotateYAxisName='0' caption='油品年销售统计' "
+ "startingAngle='125' shownames='1' showvalues='0' numberPrefix='$'>");

List<YearUnits> yearunits = yearUnitsService.getScrollData().getResultlist();
for(YearUnits units : yearunits) {
strXML1.append("<set label='" + units.getYear() + "' value='" + units.getUnits()+ "'link='JavaScript:myJS(" + units.getYear().substring(0, 4) + ")'/>");
}
strXML1.append("</chart>");
request.setAttribute("strXML1", strXML1.toString());
return mapping.findForward("report");
}

}

这里的钻取要用到ajax技术，所以接下来是月销售统计的数据钻取

import java.io.PrintWriter;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.springframework.stereotype.Controller;

import com.zxyg.bean.report.MonthUnits;
import com.zxyg.service.report.MonthUnitsService;

/**
* 月销售统计图表
* @author Lan
*
*/
@Controller("/month/units/report")
public class MonthUnitsAction extends Action {
@Resource private MonthUnitsService monthUnitsService;

@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
response.setContentType("text/html;charset=utf-8");
response.setHeader("Cache-Control", "no-cache");
PrintWriter out = response.getWriter();
String year = request.getParameter("year");
if(year != null && !"".equals(year)) {
out.print("<chart palette='2' rotateYAxisName='0' caption='上半年销售历史' xAxisName='月份' refreshInterval='60'"
+" yAxisName='Units' showValues='0'>");
List<MonthUnits> monthunits = monthUnitsService.getMonthUnitsByYear(year.trim());
for(int i=0; i<monthunits.size(); i++) {
MonthUnits monthUnits = monthunits.get(i);
out.print("<set label='" + monthUnits.getMonth()+ "' value='" + monthUnits.getUnits()+ "' />");
}
out.print("</chart>");
}
return null;
}
}

最后是页面的代码，struts1的配置我就不写了，反正是定向到WEB-INF下的fusion下的
year_units_report.jsp下
页面代码如下

<%@ page contentType="text/html;charset=UTF-8" %>
<%@ include file="/WEB-INF/page/share/taglib.jsp" %>
<%@ include file="/WEB-INF/page/share/FusionCharts.jsp" %>
<html>
<head>
<title>报表显示</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="/css/vip.css" type="text/css">
<script language="JavaScript" src="/ChartsJs/FusionCharts.js"></script>
<script LANGUAGE="JavaScript">
var xmlHttpRequest;
function myJS(myVar) {
initRequest(myVar);
}

//初始化xmlHttpRequest对象
function initRequest(myVar) {
if(window.XMLHttpRequest) {
try {
xmlHttpRequest = new XMLHttpRequest();
if(xmlHttpRequest.overrideMimeType) {
xmlHttpRequest.overrideMimeType("text/html;charset=UTF-8");
}
}catch (e) {}
}else if(window.ActiveXObject) {
try {
xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
try {
xmlHttpRequest = new ActiveXObject("Msxml2.XMLHttp");
} catch (e) {
try {
xmlHttpRequest = new ActiveXObject("Msxml3.XMLHttp");
} catch (e) {}
}
}
}
verify(myVar);
}

//准备传输数据
function verify(myVar) {
var url = "/month/units/report.do";
xmlHttpRequest.onreadystatechange = callback;
xmlHttpRequest.open("POST", url, true);
xmlHttpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xmlHttpRequest.send("year=" + myVar);
//xmlHttpRequest.send(null);
}

//定义回调函数
function callback() {
if(xmlHttpRequest.readyState == 4) {
if(xmlHttpRequest.status == 200) {
var responseText = xmlHttpRequest.responseText;
createHTML3D(responseText);
}
}
}

//创建子数据图
function createHTML3D(data) {
var myChart = new FusionCharts("/Charts/Pie3D.swf", "myChartId", "500", "300", "0", "0");
myChart.setDataXML(data);
myChart.render("chartdiv");
}
</script>
</head>

<body bgcolor="#FFFFFF" text="#000000" marginwidth="0" marginheight="0">
<%
String strXML1 = (String)request.getAttribute("strXML1");
if(strXML1 != null && !"".equals(strXML1)) {
String chartHTML1 = createChartHTML("/Charts/Column3D.swf",
"", strXML1, "YearUnits", 500, 300, false);
%>
<span>
<%=chartHTML1%>
</span>
<%
}
%>

<span id="chartdiv">
</span>
</body>
</html>

最后图的效果如下



这样就做到了动态数据交互钻取，页面不刷新。达到了预期的效果。