SSH Action使用ModelDriver实现最简单的增册改查

package cn.itcast.oa.view.action;import java.util.List;import javax.annotation.Resource;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Controller;import cn.itcast.oa.domain.Role;import cn.itcast.oa.service.RoleService;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.ModelDriven;@Controller@Scope("prototype")public class RoleAction extends ActionSupport implements ModelDriven<Role> {    private static final long serialVersionUID = 5242842204530086588L;    @Resource    private RoleService roleService;    private Role model = new Role();    public String list() throws Exception {        List<Role> roleList = roleService.findAll();        ActionContext.getContext().put("roleList", roleList);        return "list";    }    public String addUI() throws Exception {        return "addUI";    }    public String add() throws Exception {        roleService.add(model);        return "toList";    }    public String delete() throws Exception {        roleService.delete(model.getId());        return "toList";    }    public String editUI() throws Exception {        //回显数据        Role role = roleService.getById(model.getId());        ActionContext.getContext().getValueStack().push(role);        return "editUI";    }    public String edit() throws Exception {        //1.获得实体        Role role = roleService.getById(model.getId());        //2.设值        role.setName(model.getName());        role.setDescription(model.getDescription());        //3.更新        roleService.update(role);        return "toList";    }    @Override    public Role getModel() {        return model;    }    public void setRole(Role role) {        this.model = role;    }}