Cewolf+JFreeChart之报表代码实例大全不断更新中...

http://www.diybl.com/　2008-11-1 　网络　点击: 　[ 评论 ]

报表代码实例大全：
本实例采用Cewolf+JFreeChart做成。Cewolf是基于JFreechart的,利用JFreechart的绘制引擎,将最终的图片写入客户端.在服务器端不会创建任何文件。
其中这些实例中的web.xml的配置都是一样的，所以配置一次后就不再动它了
后面的每一个实例我都会给出java类和jsp页面的代码，并附上对应的显示出来的图形(这些实例中有些来自网上,我也都一并做过并成功实现)
#########################*************************#########################
==============>web.xml
<servlet>
  <servlet-name>CewolfServlet</servlet-name>
  <servlet-class>de.laures.cewolf.CewolfRenderer</servlet-class>
  
  <init-param>
   <param-name>storage</param-name>
   <param-value>
    de.laures.cewolf.storage.TransientSessionStorage
   </param-value>
  </init-param>
  
  <init-param>
   <param-name>overliburl</param-name>
   <param-value>/etc/overlib.js</param-value>
  </init-param>
  
  <init-param>
   <param-name>debug</param-name>
   <param-value>true</param-value>
  </init-param>
  <load-on-startup>4</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>CewolfServlet</servlet-name>
  <url-pattern>/adChart/*</url-pattern>
</servlet-mapping>
#########################*************************#########################
                                  时间序列图
==============>JAVA类
package cewolf;

import java.io.Serializable;
import java.text.DateFormat;
import java.text.ParseException;
import java.util.Date;
import java.util.Map;

import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;

import de.laures.cewolf.DatasetProducer;

public class AdDateLineDataset implements DatasetProducer, Serializable {
    private Number[] data;

    private Date[] dateCategories;

    public AdDateLineDataset() {
  super();
   data = new Number[]{11,33,27};
         DateFormat df = DateFormat.getDateTimeInstance();
         try {
    dateCategories = new Date[]{df.parse("2008-03-5 08:00:00"),df.parse("2008-03-5 10:00:00"),df.parse("2008-03-5 15:00:00")};
   } catch (ParseException e) {
    e.printStackTrace();
   }
}

public AdDateLineDataset(Date[] d, Number[] a) {
    }

    public Object produceDataset(Map params) {

        TimeSeries ts1 = new TimeSeries("My Title", org.jfree.data.time.Hour.class);
        for (int i = 0; i < data.length; i++) {
        ts1.add(new org.jfree.data.time.Hour(dateCategories[i]),    data[i]);
        }
        TimeSeriesCollection collect = new TimeSeriesCollection(ts1);
        return collect;
    }

    public String getProducerId() {
        return "TimeDataProducer";
    }

    public boolean hasExpired(Map params, Date since) {
        return true;
    }
    }

==============>JSP页面

<%@ page language="java" pageEncoding="UTF-8" %>
<%@page import="java.util.Date"%>
<%@taglib uri=''/WEB-INF/tlds/cewolf.tld'' prefix=''cewolf'' %>
    <html>
          <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>test</title>
      </head>
    <body>

      <jsp:useBean id="data1"      class="cewolf.AdDateLineDataset"/>

     <cewolf:chart id="pageChart2" title="时间序列图" type="timeseries"     xaxislabel="时间" yaxislabel="数量">
        <cewolf:data>
        <cewolf:producer id="data1" />
        </cewolf:data>
    </cewolf:chart>
    <cewolf:img chartid="pageChart2" renderer="/adChart" width="500" height="500"/>

    </body>
    </html>

==============>

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