JFreeChart 是一个开源的 JAVA 项目，它主要用来开发各种各样的图表，这些图表包括：饼图、柱状图 ( 普通柱状图以及堆栈柱状图 ) 、线图、区域图、分布图、混合图、甘特图以及一些仪表盘等等。在这些不同式样的图表上可以满足目前商业系统的要求。JFreeChart 是一种基于JAVA语言的图表开发技术。JFreeChart可用于Servlet、JSP、Applet、Java Appication环境中，通过JDBC可动态显示任何数据库数据。-JFreeChart is an open source Java project, it is mainly used to develop a variety of charts and graphs, including: a pie chart, histogram (the ordinary histogram as well as stack histogram), line graph, area charts, maps, hybrid graph , Gantt charts, and some dashboard. Different type of chart to meet the requirements of the current commercial systems. JFreeChart is a chart developed technology based on JAVA language. JFreeChart Servlet, JSP, Applet, Java Appication environment can be used to display any database data dynamically through JDBC.