<s:iterator id="b1" value="%{boardList}">
<li>
<s:if test="%{urlRewrite}">
<a href="javascript:;" οnclick="loadChild('<s:property value="#b1.id"/>','<s:property
value="#b1.boardType"/>')"><img id="img<s:property value="#b1.id"/>" src="images/expand.gif"
alt="展開" width="25" height="15" border="0" align="absmiddle"/></a><a href="forum-index-
<s:property value="#b1.id"/>.html"><s:property value="#b1.boardName"/></a>
</s:if>
<s:else>
<s:url action="forum?action=index" id="furl">
<s:param name="bid" value="#b1.id"/>
</s:url>
<a href="javascript:;" οnclick="loadChild('<s:property value="#b1.id"/>','<s:property
value="#b1.boardType"/>')"><img id="img<s:property value="#b1.id"/>" src="images/expand.gif"
alt="展開" width="25" height="15" border="0" align="absmiddle"/></a><a
href="${furl}"><s:property value="#b1.boardName"/></a>
</s:else>
<div id="child<s:property value="#b1.id"/>" class="nag" style="display:none">
<s:set name="bl2" value="%{boardMap.get(#b1.id)}"></s:set>
<ul>
<s:iterator id="b" value="#bl2">
<s:url action="forum?action=index" id="burl">
<s:param name="bid" value="#b.id"/>
</s:url>
<li>
<s:if test="%{urlRewrite}">
<img id="img<s:property value="#b.id"/>" src="images/node.gif" alt=""
align="absmiddle"/><a href="forum-index-<s:property value="#b.id"/>.html"><s:property
value="#b.boardName"/></a>
</s:if>
<s:else>
<s:url action="forum?action=index" id="burl">
<s:param name="bid" value="#b.id"/>
</s:url>
<img id="img<s:property value="#b.id"/>" src="images/node.gif" alt=""
align="absmiddle"/><a href="${burl}"><s:property value="#b.boardName"/></a>
</s:else>
</li>
</s:iterator>
</ul>
</div>
</li>
好，我們看in!首先看它的interceptor:
<action name="in" class="inAction">
<interceptor-ref name="mainUserAuthInterceptorStack"></interceptor-
ref>
<interceptor-ref name="requestBasePathInterceptor"></interceptor-
ref>//講過
<result name="success">/WEB-INF/jsp/in.jsp</result>
</action>
這裏有一個mainUserAuthInterceptorStack:
<interceptor-stack name="mainUserAuthInterceptorStack">
<interceptor-ref name="defaultStack"></interceptor-ref>
<interceptor-ref name="userLoginInterceptor"></interceptor-
ref>//講過
<interceptor-ref
name="userSessionInterceptor"></interceptor-ref>
<interceptor-ref name="userOnlineInterceptor"></interceptor
-ref>
<interceptor-ref
name="userPermissionInterceptor"></interceptor-ref>//講過！
</interceptor-stack>
好，我們看看UserSessionInterceptor和userOnlineInterceptor吧：
public String intercept(ActionInvocation invocation) throws Exception {
ActionContext ac = invocation.getInvocationContext();
Object action = invocation.getAction();
if (action instanceof UserSessionAware) {
HttpServletRequest request = (HttpServletRequest) ac.get
(ServletActionContext.HTTP_REQUEST);
HttpServletResponse response = (HttpServletResponse) ac.get
(ServletActionContext.HTTP_RESPONSE);
ServletContext servletContext = (ServletContext) ac.get
(ServletActionContext.SERVLET_CONTEXT);
WebApplicationContext wc =
WebApplicationContextUtils.getWebApplicationContext(servletContext);
if (wc == null) {
logger.error("ApplicationContext could not be found.");
} else {
SysConfig sysConfig = (SysConfig) wc.getBean("sysConfig");
UserCookie userCookie = new UserCookie(request, response,
sysConfig);//得到UserCookie!
((UserSessionAware) action).setUserCookie(userCookie);
UserSession us = (UserSession) ac.getSession().get
(Constant.USER_SESSION_KEY);//得到UserSession!
((UserSessionAware)
action).setUserSession(us);
}
}
return invocation.invoke();//將兩個都放到UserSessionAware(它有兩個公開實現的
方法),以便action類使用！
/**
public interface UserSessionAware {
public void setUserCookie(UserCookie userCookie);
public void setUserSession(UserSession userSession);
}
*/
}
現在，我們要認真地分析下userOnlineInterceptor:
long nowTime = System.currentTimeMillis();//現在的時間long
long addedTime = nowTime - us.getLastActiveTime();//相隔的時間
us.setAddedOnlineTime(us.getAddedOnlineTime() + addedTime);//累加在
線時間
us.setAddedOnlineHour(us.getAddedOnlineHour() + addedTime);//累加在
線小時數
其實這個攔截器是在us.getAddedOnlineTime()>(sysConfig.getUserOnlineTime()*1000)這個條件去改變
相關的數據的！若不存在在線信息，添加之！若存在uo,其中比較了uo 和us的validateCode:
if (uo != null && !uo.getValidateCode().equals(us.getValidateCode())) { // 用戶重複登錄
String ajax = "html";
Map map = ac.getParameters();//action的參數
！
String[] _ajax = (String[]) map.get("ajax");
if (_ajax != null) {
ajax = _ajax[0];//ajax="html"
}
ResourceBundleMessageSource messageSource =
(ResourceBundleMessageSource) wc
.getBean("messageSource");
String errorMsg = messageSource.getMessage
("error.login.re", null, ac.getLocale());
if (ajax.equalsIgnoreCase("html") ||
ajax.equalsIgnoreCase("shtml")) {
return "relogin";
} else {
AjaxMessagesJson ajaxMessagesJson =
(AjaxMessagesJson) wc.getBean("ajaxMessagesJson");
ajaxMessagesJson.setMessage
("E_LOGIN", errorMsg);
ac.getValueStack().set
("ajaxMessagesJson", ajaxMessagesJson);
return "ajaxjson";
}
這裏的relogin:
<result name="relogin" type="redirect-action">login?action=relogin</result>注意你有個
actionerror!
接下來，是修改相應的userinfo信息及清理us!
UserInfo ui = userService.findUserInfoById(us.getId());
if (ui != null) { // 取得正確用戶信息
ui.setStayTime(ui.getStayTime() +
(us.getAddedOnlineTime() / 1000)); // 增加用戶在線時長
us.setAddedOnlineTime(0);
// 刷新權限
if (Constant.USE_PERMISSION_CACHE) {
logger.debug("刷新用戶權限");
us.setGroupID(ui.getGroupID());
us.setBoardPermissionArray
(userService.getUserPermission(ui));
}
if (us.getAddedOnlineHour() >= 3600000) {
logger.info("用戶在線累計超過1個小時
，增加用戶經驗值");
ui.setExperience(ui.getExperience()
+ (int) (us.getAddedOnlineHour() / 3600000));
us.setAddedOnlineHour(0);
}
最後，我們應該改變useronline的時間(用戶在線存在時),以及us的活躍時間！
us.setLastActiveTime(nowTime);
ac.getSession().put(Constant.USER_SESSION_KEY, us);
好的，我們回到in:
<action name="in" class="inAction">
<interceptor-ref name="mainUserAuthInterceptorStack"></interceptor-
ref>//它有默認
defaultStack,userLoginInterceptor,userSessionInterceptor,userOnlineInterceptor,userPermissio
nInterceptor（請注意聯繫與順序）
<interceptor-ref name="requestBasePathInterceptor"></interceptor-
ref>
<result name="success">/WEB-INF/jsp/in.jsp</result>
</action>
我們進入In.java不過它只實現了RequestBasePathAware:
其execute由index去完成！我們注意到extends BaseMainAction,而BaseMainAction:
public class BaseMainAction extends BaseAction implements UserSessionAware {
private UserCookie userCookie;//get/set
private UserSession userSession;
public String execute() {
try {
return this.executeMethod(this.getAction());
} catch (Exception e) {
logger.error(e);
this.addActionError(this.getText("error.msg"));
return ERROR;
}
}
-->
protected String executeMethod(String method) throws Exception {
Class[] c = null;
Method m = this.getClass().getMethod(method, c);
Object[] o = null;
String result = (String) m.invoke(this, o);
return result;
}
這個Action類注入有這些服務
userService,notService,friendService,userOnlineService,forumService,sysConfig,sysStatService
,boardService!而也於表單的或其它的屬性(頁面調用)有：
onlineHighest,sysinfo,lastLoginTime,titleValue,userTitle,newNoteNumInbox,noteAllNumInbox,fre
indNum,onlineGuestNum,friendOnlineNum,guest,newForums
(List<Forum>),boardList,boardMap,urlRewrite,usePass,actionUrl,toUrl,forumSite,useAuthCode.
我們先看onlineNum和onlineGuestNum的做法：
long atime = System.currentTimeMillis() - (this.getSysConfig().getUserOnlineTime() * 1000);
long onlineNum = this.getUserOnlineService().getUserOnlineNum(atime, 0, 0,
Constant.NORMAL_USER_GROUPS);
long onlineGuestNum = this.getUserOnlineService().getUserOnlineNum(atime, 0,
0, Constant.GUEST_USER_GROUPS);
this.getSysStatService().saveOnline(onlineNum + onlineGuestNum);
this.setSysinfo(this.getText("bbscs.sysinfo", new String[] {
String.valueOf(this.getSysStatService().getPostMainNum()),
String.valueOf(this.getSysStatService().getPostNum()),
String.valueOf(this.getSysStatService().getAllUserNum()), reguserurl
}));//bbscs.sysinfo=社區信息:主題數: {0} / 帖子總數: {1} / 社區人數: {2} / 歡迎新用戶: {3}
其中：
long foNum = this.getUserOnlineService().getUserOnlineNumInIds(atime,
this.getFriendService().findFriendIds
(this.getUserSession().getId(), 0), 0, 0,
Constant.NORMAL_USER_GROUPS);
this.setFriendOnlineNum(foNum);
其實struts2.0的Action我覺得比Struts1.2強在不僅能從表單得到數據，也能將數據傳遞過JSP界面，通
過標籤或表達式語言show出來！
到in.jsp看看：
對於這個主頁充分體現了strut2在界面上做的一些工作！請參考相關資料：
http://www.blogjava.net/max/archive/2006/10/18/75857.aspx
http://www.blogjava.net/max/archive/2007/04/28/114417.html
總體上對版區的顯示是：
<s:iterator id="board" value="%{boardList}">
<s:if test="#board.boardType==1">
</s:if>
<s:if test="#board.boardType==3">
</s:if>
<s:set name="bl2" value="%{boardMap.get(#board.id)}"></s:set>
<s:iterator id="b" value="#bl2">
</s:iterator>
</s:iterator>
下面的最新貼由action傳遞過來的值：
<table width="100%" border="0" cellpadding="3" cellspacing="0">
<s:iterator id="newf" value="%{newForums}">
<tr>
<td>
<s:if test="%{urlRewrite}">
<a href="read-topic-<s:property value="#newf.boardID"/>-
<s:property value="#newf.mainID"/>-0-1-index-1.html"><s:property value="#newf.title"/></a>
[<a href="forum-index-<s:property
value="#newf.boardID"/>.html"><s:property value="#newf.boardName"/></a>]
</s:if>
<s:else>
<s:url action="read?action=topic"
id="posturl">
<s:param name="bid"
value="#newf.boardID"/>
<s:param name="id"
value="#newf.mainID"/>
<s:param name="fcpage" value="1"/>
<s:param name="fcaction"
value="index"/>
</s:url>
<a href="${posturl}"><s:property
value="#newf.title"/></a>
<s:url action="forum?action=index"
id="forumurl">
<s:param name="bid"
value="#newf.boardID"/>
</s:url>
[<a href="${forumurl}"><s:property
value="#newf.boardName"/></a>]
</s:else>
</td>
</tr>
</s:iterator>
</table>
而其它的(如：班竹推薦，積分榜）大多由bbscs標籤完成！我們來看看我
<table width="100%" border="0" cellpadding="3" cellspacing="0">
<bbscs:in type="commend"/>
</table>
這裏我們重點分析一下bbscs在這頁的一些tag:
<bbscs:face value="%{userSession.id}"/>
<bbscs:datetimes format="yyyy-MM-dd HH:mm:ss" datetype="date" value="%{lastLoginTime}"/>
<bbscs:boardmaster value="#board.boardMaster"/>
<bbscs:in type="commend"/>
<bbscs:in type="userexp"/>
<bbscs:in type="userlit"/>
<bbscs:in type="userknow"/>
我們一個一個來看：
<tag>
<name>face</name>
<tag-class>com.laoer.bbscs.web.taglib.UserFaceTag</tag-class>
<body-content>empty</body-content>
<attribute>
<name>value</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
我們直接看UserFace.java:
public boolean start(Writer writer) {
boolean result = super.start(writer);
if (value == null) {
value = "top";
} else if (altSyntax()) {
if (value.startsWith("%{") && value.endsWith("}")) {
value = value.substring(2, value.length() -
1);//userSession.id
}
}
String userId = "";
Object idObj = this.getStack().findValue(value);//從棧中取值！
if (idObj != null) {
userId = (String) idObj;
}
StringBuffer sb = new StringBuffer();
if (StringUtils.isBlank(userId)) {
sb.append("<img src="");
sb.append(facePicName);
sb.append("" alt="Face" />");
try {
writer.write(sb.toString());
} catch (IOException e) {
e.printStackTrace();
}
return result;
} else {
if (userId.startsWith(Constant.GUEST_USERID)) { // 遊客
sb.append("<img src="");
sb.append(facePicName);
sb.append("" alt="Face" />");
} else { // 正常用戶
WebApplicationContext wc =
WebApplicationContextUtils.getWebApplicationContext(this.pageContext
.getServletContext());
UserService us = (UserService) wc.getBean("userService");
UserInfoSimple uis = us.getUserInfoSimple(userId);
if (uis.getHavePic() == 1 && !uis.getPicFileName().equals
("-")) {
sb.append("<a href="");
sb.append(BBSCSUtil.getUserWebPath(uis.getId()));
sb.append(uis.getPicFileName());//大圖
sb.append("" target="_blank">");
sb.append("<img src="");
sb.append(BBSCSUtil.getUserWebPath(uis.getId()));
sb.append(uis.getPicFileName());
sb.append(Constant.IMG_SMALL_FILEPREFIX);//小圖
sb.append("" alt="Face" border="0"
class="pic1"/>");
sb.append("</a>");
} else {
sb.append("<img src="");
sb.append(facePicName);
sb.append("" alt="Face" />");
}
}
try {
writer.write(sb.toString());
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
我們看第二個:
<bbscs:datetimes format="yyyy-MM-dd HH:mm:ss" datetype="date" value="%{lastLoginTime}"/>
<tag>
<name>datetimes</name>
<tag-class>com.laoer.bbscs.web.taglib.DateTimesTag</tag-class>
<body-content>empty</body-content>
<attribute>
<name>value</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
<name>datetype</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
<name>format</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
我們看com.laoer.bbscs.web.taglib.DateTimes關鍵的代碼片斷：
Date date = null;
if (this.datetype.equalsIgnoreCase("timestamp")) {
long atime = (Long) this.getStack().findValue(value);
date = new Date(atime);
} else if (this.datetype.equalsIgnoreCase("date")) {
date = (Date) this.getStack().findValue(value);
} else {
date = new Date();
}
String stime = Util.formatDate(date, format);//format有默認格式！
try {
writer.write(stime);
} catch (IOException e) {
logger.error(e);
}
好，我們看第三個：<bbscs:boardmaster value="#board.boardMaster"/> #board是個標誌！
<tag>
<name>boardmaster</name>
<tag-class>com.laoer.bbscs.web.taglib.BoardMasterTag</tag-class>
<body-content>empty</body-content>
<attribute>
<name>value</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
其主要的代碼如下:
Map boardMasterMap = (Map) this.getStack().findValue(value);//返回的是Map對象!
if (boardMasterMap != null) {
StringBuffer sb = new StringBuffer();
// Set bmSet = boardMasterMap.entrySet();
Iterator bmit = boardMasterMap.values().iterator();
while (bmit.hasNext()) {
com.laoer.bbscs.bean.BoardMaster bm =
(com.laoer.bbscs.bean.BoardMaster) bmit.next();
if (bm.getIsHidden() == 0) {//不是隱身的！
sb.append("<a href="");
sb.append(BBSCSUtil.getActionMappingURL("/userInfo?
action=name&username=" + bm.getUserName(),
request));
sb.append("">");
sb.append(bm.getUserName());
sb.append("</a> ");
}
}
try {
writer.write(sb.toString());
} catch (IOException e) {
e.printStackTrace();
}
}
好，我們看最後一個了：<bbscs:in type="userknow"/> type有四種！
<tag>
<name>in</name>
<tag-class>com.laoer.bbscs.web.taglib.InTag</tag-class>
<body-content>empty</body-content>
<attribute>
<name>type</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
由於InTag中：
public Component getBean(ValueStack arg0, HttpServletRequest arg1,
HttpServletResponse arg2) {
return new InComponent(arg0);
}
protected void populateParams() {
super.populateParams();
InComponent tag = (InComponent)component;
tag.setType(type);
}
所示其執行者爲InComponent,而非In!這可在InComponent.java裏看到：
if (this.getType().equalsIgnoreCase("commend")) {
File commendFile = new File(BBSCSUtil.getIncludePath() +
"ForumCover_Commend_0.html");
String commendlist = "";
try {
commendlist = FileUtils.readFileToString(commendFile,
Constant.CHARSET);
if (commendlist == null) {
commendlist = "";
}
} catch (IOException ex) {
logger.error(ex);
commendlist = "";
}
this.write(writer, commendlist);
return result;
}
-->
private void write(Writer writer, String txt) {
try {
writer.write(txt);
} catch (IOException e) {
e.printStackTrace();
}
}
最後，我們應該對in.jsp中的一些東西有點感覺：
<s:property value="%{sysinfo}" escape="false"/>
其後面提供了google對本系統的搜索，也提供了搜索用戶的表單：
<s:form action="userInfo">
<s:hidden name="action" value="name"></s:hidden>
===========================================================================================
在分析三，我們已經分析出jsp頁面如何通過struts2的標籤與action配合，將數據在表示層傳遞(set/get),並且把主要的開始流程給分析完了。這裏我們將前臺的主要請求大致分析一下：從導航部分開始，對於社區首頁in.bbscs我們已經講過，它這裏只不過是將框架的target=mainForm以便從任何位置轉到首頁!進入個人中心，點擊修改簽名，觸發了signSet.bbscs:
<action name="signSet" class="signSetAction">
<interceptor-ref name="mainUserAuthInterceptorStack"></interceptor-ref>//用戶權限！
<result name="success">/WEB-INF/jsp/signSet.jsp</result>
<result name="input">/WEB-INF/jsp/signEdit.jsp</result>
</action>
-->
注意到BaseMainAction:
public String execute() {
try {
return this.executeMethod(this.getAction());
} catch (Exception e) {
logger.error(e);
this.addActionError(this.getText("error.msg"));
return ERROR;
}
}
而在BaseAction:private String action = "index";
public String index() {
String[] userSign = new String[3];
userSign[0] = this.getUserSession().getSignDetail()[0];//從UserSession的SignDetail數組中把三個對象拿出來！
userSign[1] = this.getUserSession().getSignDetail()[1];
userSign[2] = this.getUserSession().getSignDetail()[2];
userSign = BBSCSUtil.filterUserSign(userSign, this.getSysConfig().isSignUseHtml(), this.getSysConfig()
.isSignUseUBB(), this.getSysConfig().isSignUseSmile());
this.setUserSign0(userSign[0]);
this.setUserSign1(userSign[1]);
this.setUserSign2(userSign[2]);
return SUCCESS;
}
