在tomcat中怎么配置jfeechart?()
日期：2014-05-18 浏览次数：20827 次
在tomcat中如何配置jfeechart???(在线等)
如题,我照网上说的,
下载了jfreechart-1.0.5.zip,
将jfreechart-1.0.5.zip中的lib路径下的jar文件拷贝到tomcat的common/lib路径下,
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:8000/mydesign/jfreechart.jsp
(我改了端口)
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>
但,出现问题啊:
tomcat中报错:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /a.jsp(1,1) Page directive has invalid attribute: contenttype
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
org.apach
如题,我照网上说的,
下载了jfreechart-1.0.5.zip,
将jfreechart-1.0.5.zip中的lib路径下的jar文件拷贝到tomcat的common/lib路径下,
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:8000/mydesign/jfreechart.jsp
(我改了端口)
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>
但,出现问题啊:
tomcat中报错:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /a.jsp(1,1) Page directive has invalid attribute: contenttype
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
org.apach
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