activiti_安装所需插件

activiti bpmn插件安装失败， 报错原因： Cannot complete the install because one or more required items could not be found. Software being installed: Activiti Eclipse BPMN 2.0 Designer 5.18.0.201508100929 (org.activiti.designer.feature.feature.group 5.18.0.201508100929) Missing requirement: Activiti Eclipse BPMN 2.0 Designer 5.18.0.201508100929 (org.activiti.designer.feature.feature.group 5.18.0.201508100929) requires 'org.eclipse.emf.transaction 1.4.0' but it could not be found 解决办法：解压缩后，将三个jar文件放置在eclipse目录下的plugins目录下