我在网上查了不少关于这方面的资料
各有说法,我其中一方法
将jfreechart-1.0.0.zip中的lib路径下的jar文件拷贝到tomcat的common/lib路径下3. 修改tomcat的conf/web.xml文件,添加:<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DisplayChart</servlet-name>
<url-pattern>/servlet/DisplayChart</url-pattern>
</servlet-mapping>
测试demo文件:http://localhost:8080/jfreechart.jsp,当你看到图片就说明jfreechart配置成功啦!jfreechart.jsp代码:<%@ page contentType="text/html;charset=GBK"%><%@ page import="org.jfree.data.general.DefaultPieDataset"%><%@ page import="org.jfree.chart.JFreeChart"%><%@ page import="org.jfree.chart.plot.PiePlot"%><%@ page import="org.jfree.chart.ChartRenderingInfo"%><%@ page import="org.jfree.chart.servlet.ServletUtilities"%><%@ page import="org.jfree.chart.urls.StandardPieURLGenerator"%><%@ page import="org.jfree.chart.entity.StandardEntityCollection"%><%@ page import="org.jfree.chart.encoders.SunPNGEncoderAdapter"%>
<%DefaultPieDataset data = new DefaultPieDataset();data.setValue("六月", 500);data.setValue("七月", 580);data.setValue("八月", 828); PiePlot plot = new PiePlot(data);JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, true);chart.setBackgroundPaint(java.awt.Color.white); //可选,设置图片背景色chart.setTitle("Welcome to Jfreechart !"); //可选,设置图片标题ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());//500是图片长度,300是图片高度String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session);String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename; %><HTML><HEAD>
<TITLE>Welcome to Jfreechart !</TITLE></HEAD><BODY><P ALIGN="CENTER"><img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>"></P>
</BODY>
</HTML>可以运行的时候就提示错误:好像是上面引入的包不存在
不知道哪里问题 请赐教!!
各有说法,我其中一方法
将jfreechart-1.0.0.zip中的lib路径下的jar文件拷贝到tomcat的common/lib路径下3. 修改tomcat的conf/web.xml文件,添加:<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DisplayChart</servlet-name>
<url-pattern>/servlet/DisplayChart</url-pattern>
</servlet-mapping>
测试demo文件:http://localhost:8080/jfreechart.jsp,当你看到图片就说明jfreechart配置成功啦!jfreechart.jsp代码:<%@ page contentType="text/html;charset=GBK"%><%@ page import="org.jfree.data.general.DefaultPieDataset"%><%@ page import="org.jfree.chart.JFreeChart"%><%@ page import="org.jfree.chart.plot.PiePlot"%><%@ page import="org.jfree.chart.ChartRenderingInfo"%><%@ page import="org.jfree.chart.servlet.ServletUtilities"%><%@ page import="org.jfree.chart.urls.StandardPieURLGenerator"%><%@ page import="org.jfree.chart.entity.StandardEntityCollection"%><%@ page import="org.jfree.chart.encoders.SunPNGEncoderAdapter"%>
<%DefaultPieDataset data = new DefaultPieDataset();data.setValue("六月", 500);data.setValue("七月", 580);data.setValue("八月", 828); PiePlot plot = new PiePlot(data);JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, true);chart.setBackgroundPaint(java.awt.Color.white); //可选,设置图片背景色chart.setTitle("Welcome to Jfreechart !"); //可选,设置图片标题ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());//500是图片长度,300是图片高度String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session);String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename; %><HTML><HEAD>
<TITLE>Welcome to Jfreechart !</TITLE></HEAD><BODY><P ALIGN="CENTER"><img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>"></P>
</BODY>
</HTML>可以运行的时候就提示错误:好像是上面引入的包不存在
不知道哪里问题 请赐教!!
解决方案 »
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