package nm.admin.action;
import java.util.Vector;
import nm.Constants;
import nm.DB;
import nm.User;
import nm.admin.form.UserInfoForm;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sql.DataSource;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
public final class NewUserAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
 HttpServletRequest request, HttpServletResponse response)
 throws Exception {
//获取来自UserInfoForm对象的数据
UserInfoForm newUserForm = (UserInfoForm) form;
String username = newUserForm.getUsername();
String password = newUserForm.getPassword();
int sex = newUserForm.getSex();
String email = newUserForm.getEmail();
String address = newUserForm.getAddress();
String grade1 = newUserForm.getGrade();
String grade = null;
if (grade1.equals("1")) {
grade = "admin";
} else {
grade = "user";
}

            //使用struts-config.xml配置文件的数据源信息生成数据库操作类DB的对象
ServletContext context = servlet.getServletContext();
DataSource dataSource = (DataSource) context
.getAttribute(Constants.DATASOURCE_KEY);
DB db = new DB(dataSource);

            //新建需要用到的对象，并为其初始化。其中表示转发页面的
pageForward被初始化为ToErrorPage。
HttpSession session = request.getSession();
ActionMessages errors = new ActionMessages();
String pageForward = "ToErrorPage";

            //新建User对象，保存从UserInfoForm对象得到的数据
User user = new User();
user.setUsername(username);
user.setPassword(password);
user.setSex(sex);
user.setEmail(email);
user.setAddress(address);
user.setGrade(grade);

            //使用User.insert方法将新用户信息插入到数据库中
if (user.insert(db)) {
//如果User.insert方法执行成功的话
//从数据库中查询得到所有用户的信息，包含到Vector中
//并将这个Vector保存到session中。然后将请求转发到ToUserList所代表的路径
Vector userVector = new Vector();
userVector = User.searchUsers(db);
session.setAttribute(Constants.USER_LIST_KEY, userVector);
pageForward = "ToUserList";
} else {
//如果User.insert方法执行失败的话，
//则在ActionMessage对象中封装消息（由error.newuser.insert.failed所代表），
//并保存到request范围内，此时表示转发页面的pageForward
对象仍然为初始值ToErrorPage
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
"error.newuser.insert.failed"));

                  if (!errors.isEmpty()) {
saveErrors(request, errors);
}
}

            //关闭数据库连接，并根据pageForward值将请求转发到相应路径
db.close();
return mapping.findForward(pageForward);
}
}