这学期学软件工程做的航空订票系统开发过程中的UML图，包括用例和状态，甘特图没找到，如果需要的话，请留言给我，我再-Learn to do this semester software engineering development process of aviation reservation systems in the UML diagrams, including the use of cases and the state, Gantt Chart not find, if neces

JFreeChart是一组功能强大、灵活易用的Java绘图API，使用它可以生成多种通用性的报表，包括柱状图、饼图、曲线图、甘特图等- JFreeChart is a powerful, flexible and easy to use Java graphics API, with which you can generate a variety of reports versatility, including bar charts, pie charts, graphs, Gantt