摘要： 1. Right click on the project and go to "Properties" //鼠标右键点击项目，然后选中Properties 2. Select "Java Build Path" on the left //选择java Build Path 3. Open "Source" tab // 打开源文件的tab栏 4. Click "Add Folder..." //点击添加文件夹 5. Check "gen" folder and click Ok and Ok 阅读全文