In my career I often needed to draw UML diagrams and generate Java code. I found MagicDraw most appealing and I'm a happy user. I think their licensing model is fair because it allows to pay for what you need. I prefer it to other products I used in my (distant) past: ArgoUML, Poseidon, Rational Rose, Dia. Be aware that my experiences on other products are obsolete and have maybe significantly improved or changed their licensing model. Maybe you should start with an open-source tool and decide later whether to spend some bucks.

使用MagicDraw，您可以通过从代码生成图表来记录您的代码。您也可以先建模，然后生成代码。它还可以很好地与多个ide集成。

您可以在Visual Studio 2010 Ultimate中创建UML类、序列、组件、用例和活动图。您可以将这些图链接到Team Foundation工作项，以便您可以计划并跟踪开发和测试工作。您还可以从代码中创建序列、依赖关系图和层图，并使用架构资源管理器浏览和探索您的解决方案。

我在个人资料上发布了更多的链接以获取更多信息。

对于序列图，请尝试websequencediagrams.com。这是一个免费增值的产品(基本任务免费，高级功能付费)，可以让你快速绘制出一个图表，而无需对线条和模板进行任何繁琐的操作。

Alice->Bob: Authentication Request
note left of Bob: Bob thinks about it
Bob->Alice: Authentication Response

PlantUML是一个开源的Java标记语言到uml图工具，这里值得一提。它在可用性方面排名很高，因为它对各种图表和图表组件的语法很直观。

In my career I often needed to draw UML diagrams and generate Java code. I found MagicDraw most appealing and I'm a happy user. I think their licensing model is fair because it allows to pay for what you need. I prefer it to other products I used in my (distant) past: ArgoUML, Poseidon, Rational Rose, Dia. Be aware that my experiences on other products are obsolete and have maybe significantly improved or changed their licensing model. Maybe you should start with an open-source tool and decide later whether to spend some bucks.

使用MagicDraw，您可以通过从代码生成图表来记录您的代码。您也可以先建模，然后生成代码。它还可以很好地与多个ide集成。

对于序列图，有免费的基于java的快速序列图编辑器。序列在文本编辑器中编写，然后由QSDE引擎渲染。它可以导出各种矢量和位图文件格式。