Eclipse插件之 Activiti Designer

遇到的问题：

在 Eclipse 中安装 Activiti Designer 插件过程中遇到无法安装的情况，提示错误信息如下：

Cannot complete the install because one or more required items could not be found.

Software being installed: Activiti Eclipse BPMN 2.0 Designer 5.18.0(org.activiti.designer.feature.feature.group 5.8.0)

Missing requirement: Activiti Eclipse BPMN 2.0 Designer 5.18.0(org.activiti.designer.feature.feature.group 5.8.0) requires 'org.eclipse.emf.transaction 1.4.0' but it could not be found.

错误原因：

缺少以下三个JAR：

org.eclipse.emf.transaction_1.8.0.201405281451.jar

org.eclipse.emf.validation_1.8.0.201405281429.jar

org.eclipse.emf.workspace_1.5.1.201405281451.jar

解决办法：

下载 Eclipse Modeling Tools ，并拷贝其plugins目录下以上三个jar至需要安装 Activiti Designer 插件的 Eclipse -> plugins 目录下，如图：

再次安装 Activiti Designer 即可。