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。