public boolean canModify(Object element, String property) {
    if(property.equals("choose")){
     return true;
    }
    return false;
   }

   public Object getValue(Object element, String property) {
    Object result=null;
    MichelleSelectedModule module=(MichelleSelectedModule)element;
    if(property.equals("choose")){
     return new Boolean(module.getSelected());
    }else if(property.equals("module")){
     return module.getPlugin();
       }else{
         return result;
       }
   }

   public void modify(Object element, String property, Object value) {
    MichelleSelectedModule module=(MichelleSelectedModule)((TableItem) element).getData();
    if(property.equals("choose")){
     module.setSelected(((Boolean)value).booleanValue());
    }
    selectionList.moduleChanged(module);
   }
  }
 }
3.创建modellist 为tableviewer提供添加 删除 更新等model的方法
private ModuleSelectionList selectionList=new ModuleSelectionList();
 class CheckBoxContentProvider implements IStructuredContentProvider,IModuleListViewer{
  public Object[] getElements(Object inputElement) {
   return selectionList.getElements();
  }

  public void dispose() {
   selectionList.removeChangeListener(this);
  }

  public void addModule(MichelleSelectedModule module) {
   viewer.add(module);
  }

  public void removeModule(MichelleSelectedModule module) {
   viewer.remove(module);
  }
  
  public void updateModule(MichelleSelectedModule module) {
   viewer.update(module, null); 
  }

  public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
   if (newInput != null)
    ((ModuleSelectionList) newInput).addChangeListener(this);
   if (oldInput != null)
    ((ModuleSelectionList) oldInput).removeChangeListener(this);
  }
 }
4.创建LabelProvider  (这个LabelProvider 在第一列提供checkbox选项)
class CheckBoxLabelProvider extends LabelProvider implements ITableLabelProvider{
  private Image getImageByBoolean(boolean selected) {
      return selected?checkImage.createImage():unCheckImage.createImage();
  }
  public Image getColumnImage(Object element, int columnIndex) {
   return (columnIndex == 0) ?   // COMPLETED_COLUMN?
     getImageByBoolean(((MichelleSelectedModule) element).getSelected()) :
     null;
  }

  public String getColumnText(Object element, int columnIndex) {
   String result = "";
   if(element==null)return result;
   MichelleSelectedModule module=(MichelleSelectedModule)element;
   switch (columnIndex) {
    case 0:  // COMPLETED_COLUMN
     break;
    case 1 :
     result =module.getPlugin();
     break;
    default :
     break;  
   }
   return result;
  }
  
 }