read-JpetStore-3-用户管理

王朝java/jsp·作者佚名  2006-01-31
窄屏简体版  字體: |||超大  

● JPetStore用户管理分析

JPetStore将登陆后的用户ActionForm保持于Session作用域中,在页面中判断该ActionForm中的用户信息,实现了简单的用户验证。

Ø 进入用户管理

<a href="<c:url value="/shop/signonForm.do"/>">

Ø Struts-config.xml配置

<action path="/shop/signonForm"

type="org.springframework.samples.jpetstore.web.struts.DoNothingAction"

validate="false">

<forward name="success" path="/WEB-INF/jsp/struts/SignonForm.jsp"/>

</action>

Ø 进入用户登陆的SignonForm.jsp

… …

<form action="<c:url value="/shop/signon.do"/>" method="POST">

<c:if test="${!empty signonForwardAction}">

<input type="hidden" name="forwardAction"

value="<c:url value="${signonForwardAction}"/>"/>

</c:if>

<td colspan="2">Please enter your username and password.

<td><input type="text" name="username" value="j2ee" /></td>

<td><input type="password" name="password" value="j2ee" /></td>

<td><input type="image" border="0" src="../images/button_submit.gif" name="update"

<a href="<c:url value="/shop/newAccountForm.do"/>">

<img border="0" src="../images/button_register_now.gif" />

</a>

</form>

… …

Ø SignonAction类

i) <action path="/shop/signon"

type="org.springframework.samples.jpetstore.web.struts.SignonAction"

name="accountForm" scope="session" validate="false">

<forward name="success" path="/shop/index.do"/>

</action>

ii) <form-bean name="accountForm"

type="org.springframework.samples.jpetstore.web.struts.AccountActionForm"/>

iii) SignonAction

public class SignonAction extends BaseAction {

public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

request.getSession().removeAttribute("workingAccountForm");

request.getSession().removeAttribute("accountForm");

//如果用户注销,则清空Session

if (request.getParameter("signoff") != null) {

request.getSession().invalidate();

return mapping.findForward("success");

}

else {

AccountActionForm acctForm = (AccountActionForm) form;

String username = acctForm.getUsername();

String password = acctForm.getPassword();

//用户验证

Account account = getPetStore().getAccount(username, password);

if (account == null) {

request.setAttribute("message", "Invalid username or password. Signon failed.");

return mapping.findForward("failure");

}

else {

String forwardAction = acctForm.getForwardAction();

acctForm = new AccountActionForm();

acctForm.setForwardAction(forwardAction);

acctForm.setAccount(account);

acctForm.getAccount().setPassword(null);

PagedListHolder myList = new PagedListHolder(getPetStore().getProductListByCategory(account.getFavouriteCategoryId()));

myList.setPageSize(4);

acctForm.setMyList(myList);

//用户通过验证后,将ActiongFrom存入Session

request.getSession().setAttribute("accountForm", acctForm);

if (acctForm.getForwardAction() == null || acctForm.getForwardAction().length() < 1) {

return mapping.findForward("success");

}

else {

response.sendRedirect(acctForm.getForwardAction());

return null;

}

}

}

}

}

iv)

<!—查找Session中是否存在accountForm.account对象,以此判断用户是否登陆-->

<c:if test="${!empty accountForm.account}">

<b><i><font size="2" color="BLACK">Welcome

<!—如果已经登陆,显示欢迎信息-->

<c:out value="${accountForm.account.firstName}"/>!</font></i></b>

</c:if>

<!—查找Session中是否存在accountForm.account对象,以此判断用户是否登陆-->

<c:if test="${!empty accountForm.account}" >

<!—如果已经登陆,显示修改用户信息URL-->

<a href="<c:url value="/shop/signon.do?signoff=true"/>">

<img border="0" name="img_signout" src="../images/sign-out.gif" /></a>

<img border="0" src="../images/separator.gif" />

<a href="<c:url value="/shop/editAccountForm.do"/>">

<img border="0" name="img_myaccount" src="../images/my_account.gif" /></a>

</c:if>

v)

<action path="/shop/editAccountForm" type="org.springframework.samples.jpetstore.web.struts.EditAccountFormAction"

name="workingAccountForm" scope="session" validate="false">

<forward name="success" path="/WEB-INF/jsp/struts/EditAccountForm.jsp"/>

</action>

<form-bean name="workingAccountForm" type="org.springframework.samples.jpetstore.web.struts.AccountActionForm"/>

大概看了看,总的来说,JPetStore的应用逻辑还是比较简单,JpetStore的学习和分析也就到此结束。

 
 
 
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