在项目上右击，选择“Properties"，按以下配置：
step1. Typing in 'fa...' in the popup page, then click Enter.
step2. Select ‘Project Facets’
step3. Select ‘java’、‘Dynamic Web Module’
step4. Click 'Apply'
step5. Click 'OK'
| -- |
在项目上右击，选择“Properties"，按以下配置：
step1. Typing in 'fa...' in the popup page, then click Enter.
step2. Select ‘Project Facets’
step3. Select ‘java’、‘Dynamic Web Module’
step4. Click 'Apply'
step5. Click 'OK'
| -- |