1.注入相關的DataGrid，一定是DataGrid，不要注入DataSource。

@Inject
private DataGrid<ManufacturingTool> toolBorrowDataGrid;

2.獲取選中值

//獲得DataGrid的選中值        
Iterator<ManufacturingTool> iterator = toolBorrowDataGrid.getSelected().iterator();
List<ManufacturingTool> manufacturingTools = new ArrayList<>();       
while (iterator.hasNext()){
    manufacturingTools.add(iterator.next());        
}
//遍歷集合
for (ManufacturingTool tool:manufacturingTools) {            
    System.out.println("[編號："+tool.getCode()+" 名稱："+tool.getName()+"]");     
}
 

3.控制檯輸出