隨筆檔案

<SCRIPT language=javascript1.2>
function showsubmenu(sid)
{
whichEl = eval("submenu" + sid);
if (whichEl.style.display == "none")
{
eval("submenu" + sid + ".style.display=\"\";");
}
else
{
eval("submenu" + sid + ".style.display=\"none\";");
}
}
</SCRIPT>


用法：

<tr>
??????????? <td height="26" background="../image/menu.gif" id="menuTitle1" onClick="showsubmenu(1)" style="cursor:hand;">&nbsp;&nbsp;&nbsp;
??????????? <font color="#FF9900">■&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FFFFFF"><strong>知識庫分類</strong></font>
??????????? </td>
????????? </tr>
????????? <tr>
<td style="display:none" id='submenu1'>
???? <table cellspacing="0" align="center" width="100%">
??????????????? <tr>
????????????????? <td class="nav">· <a href="<%=request.getContextPath()%>/knowledge/knowledgeCategoryList.htm?order=list" target="mainFrame">編輯知識庫分類</a></td>
??????????????? </tr>
??????????????? <tr>
????????????????? <td class="nav">· <a href="<%=request.getContextPath()%>/knowledge/knowledgeCategoryList.htm?order=edit" target="mainFrame">新增知識庫分類</a></td>
??????????????? </tr>
????????????? </table> 在很多的列表中，后面的操作一欄會有刪除鏈接，并且會讓你確認。此處的代碼：?
<a href='javascript:deleteCategory("<%=article.getId() %>")'>刪除</a>
?????

javascript函數
<script>
?function deleteCategory(articleId)
?{
??if(confirm('是否真的要刪除該記錄'))
???window.location='<%=request.getContextPath()%>/info/infoArticleEdit.htm?order=delete&articleId='+articleId;
?}
</script>

一些鏈接：
<input class="button3" type=button value="返回" onclick="javascript:window.location='<%=request.getContextPath() %>/info/infoArticleList.htm'">

<td>文件名：<a href='<%=request.getContextPath()%>/info/infoArticleEdit.htm?order=download&fileId=<%=accessory.getId() %>'><%=accessory.getFileExt() %></a>
?????
<c:url value="........" />
??
一些傳值
<input type=hidden name=order value=save>
<input type=hidden name=id value="<c:out value="${infoArticle.id}" />">
<input type=hidden name=navId value="<%=request.getParameter("navId") %>">
<input type=hidden name=fileCount value=1>

頁面代碼：
<!--? 這個是顯示的多選框頁面 已有的角色要打勾，可以重新選擇角色-->
<form action="<c:url value="/sys/userRolesEdit.htm"/>" method="post" >

????? <table class="grid" width="100%" cellspacing="1">
?????
??? <tr>
?????? <td colspan="6" class="title">
????????? 角色列表
?????? </td>
??? </tr>
??? <tr>
??? ? <td class="column"></td>
?????? <td class="column">角色ID</td>
?????? <td class="column">角色名</td>
?????? <td class="column">角色代碼</td>
?????? <td class="column">角色描述</td>??????

??? </tr>

??? <!-- 循環顯示列表userRoles的每一項，并判斷如果數據庫中已有的打勾<c:if test標簽正確才執行中間的代碼-->
??? <c:forEach items="${roles}" var="item">????
???<tr>??????
???? <td>
???? <input type="checkbox" name="rolesId" <c:forEach items="${userRoles}" var = "selectedRoles">
???? <c:if test="${item.srolId == selectedRoles.srolId}">checked="true"</c:if></c:forEach>
????? value="<c:out value="${item.srolId}"/>" />
???? </td>
???
???? <td><c:out value="${item.srolId}"/></td>
??????? <td><c:out value="${item.srolName}"/> </td>
???????????????? <td><c:out value="${item.srolCode}"/></td>
???????????????? <td><c:out value="${item.srolDesc}"/></td>????????????????
???? <tr>???????
??? </c:forEach> ??
???
??? <tr>

?????? <td colspan="6" class="nav">&nbsp;
?????? ??? <input type="hidden" name="userID"
???value=<c:out value="${userInfo.suinId}"/>>
????? <input type="submit" class="button3" value="提交"/>
????? <INPUT type="button" class="button2" value="返回" onclick="history.back()" />
?????
?????? </td>
??? </tr>
?? </table>?
?? </form>

控制器代碼：
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
??// TODO Auto-generated method stub
??
??Map result = new HashMap();
??
??SysUserinfo userInfo = null;
??????? String id = request.getParameter("userID");

??????? System.out.println(id);
??????? if (id != null && !id.equals(""))
??????? {
??????????? userInfo = (SysUserinfo) sysService.get(SysUserinfo.class,
??????????????????? new Long(id));
???????????
??????? }
??????? else
??????? {
???????????
??????? }
???????
??????? result.put("userInfo", userInfo);
??????? result.put("roles", sysService.getSupportData("SysRole", null));
??????? if (userInfo != null)
??????? {
??????? ?result.put("userRoles", sysService.getUserRoles(userInfo));
??????? }
???????
?
???????
??????? SysUserRole sysUserRole = null;
??????? SysRole sysRole = null;
??????? String roleId = null;
???????
??????? // 記錄父列表ID
??????? result.put("parentlistID", request.getParameter("parentlistID"));
??????? result.put("userInfo", userInfo);
????????
?????????//遍歷所有map里的key
??????? Iterator it = result.keySet().iterator();
??????? while (it.hasNext())
??????? {
??????????? String key = (String) it.next();
??????????? request.setAttribute(key, result.get(key));
??????? }
????????
?????????//這里就是從列表多選框傳過來的數值。根據name屬性獲得所有的value
??????? String[] rolesId = null;
??????? rolesId = request.getParameterValues("rolesId");
??????? System.out.println("------------------------" + rolesId + "-------------------");
???????
??????? if (rolesId == null || rolesId.equals(null))
??????? {
??????? ?return new ModelAndView(formView);
??????? }
???????
??????? else
??????? {?????
??????? ?List userRoles = (List)sysService
??????? ??.getUsersUserRoles(userInfo.getSuinId());

??????//先刪除數據庫中所有的，再插入所選的值
?????????for (int k = 0; k < userRoles.size(); k++)
??? ??{
??? ???SysUserRole userRole = (SysUserRole)userRoles.get(k);?? ???
??? ???sysService.delete(userRole);
??? ???
??? ??}
??????? ?
??????? ?for (int i = 0; i < rolesId.length; i++)
??????? ?{
??????? ??roleId = rolesId[i];
??????? ??
??????? ??sysRole = (SysRole)sysService.get(SysRole.class, new Long(roleId));
??????? ??sysUserRole = new SysUserRole();
??????? ??sysUserRole.setUser(userInfo);
??????? ??sysUserRole.setRole(sysRole);
??????? ??sysService.save(sysUserRole);?????? ?
??????? ?}

?????????//如果在###-servlet.xml配置文件中，successView不能傳遞參數，可在這里直接有response導向別的頁面
?????????response.sendRedirect(request.getContextPath()
??????? ???+ "/sys/userRolesList.htm?userID=" + userInfo.getSuinId().toString());
??????? ?return null;
??????? }

?}

StringTokenizer：字符串分隔解析類型
屬于：java.util包。

１、構造函數。

1. StringTokenizer(String str) ：構造一個用來解析str的StringTokenizer對象。java默認的分隔符是“空格”、“制表符(‘\t’)”、“換行符(‘\n’)”、“回車符(‘\r’)”。
2. StringTokenizer(String str, String delim) ：構造一個用來解析str的StringTokenizer對象，并提供一個指定的分隔符。
3. StringTokenizer(String str, String delim, boolean returnDelims) ：構造一個用來解析str的StringTokenizer對象，并提供一個指定的分隔符，同時，指定是否返回分隔符。

２、方法。
說明：
1. 所有方法均為public；
2. 書寫格式：［修飾符］　<返回類型> <方法名（［參數列表］）>
如：
static int parseInt(String s) 表示：此方法（parseInt）為類方法（static），返回類型為（int），方法所需參數為String類型。

1. int countTokens() ：返回nextToken方法被調用的次數。如果采用構造函數1和2，返回的就是分隔符數量(例2)。
2. boolean hasMoreTokens() ：返回是否還有分隔符。
3. boolean hasMoreElements() ：結果同2。
4. String nextToken() ：返回從當前位置到下一個分隔符的字符串。
5. Object nextElement() ：結果同4。
6. String nextToken(String delim) ：與4類似，以指定的分隔符返回結果。

例子：

		String s = new String("The Java platform is the ideal platform for network computing");
		StringTokenizer st = new StringTokenizer(s);
		System.out.println( "Token Total: " + st.countTokens() );
		while( st.hasMoreElements() ){
			System.out.println( st.nextToken() );
　　　　　　　　　　　}
結果為：
Token Total: 10
The
Java
platform
is
the
ideal
platform
for
network
computing

例2:

		String s = new String("The=Java=platform=is=the=ideal=platform=for=network=computing");
		StringTokenizer st = new StringTokenizer(s,"=",true);
		System.out.println( "Token Total: " + st.countTokens() );
		while( st.hasMoreElements() ){
			System.out.println( st.nextToken() );
		}
結果為：
Token Total: 19
The
=
Java
=
platform
=
is
=
the
=
ideal
=
platform
=
for
=
network
=
computing

JSP語法（9）——jsp:getProperty <jsp:getProperty> 獲取Bean的屬性值，用于顯示在頁面中 JSP 語法 <jsp:getProperty name="beanInstanceName" property="propertyName" /> 例子 <jsp:useBean id="calendar" scope="page" class="employee.Calendar" /> <h2> Calendar of <jsp:getProperty name="calendar" property="username" /> </h2> 描述 這個<jsp:getProperty>元素將獲得Bean的屬性值，并可以將其使用或顯示在JSP頁面中.在你使用<jsp:getProperty>之前，你必須用<jsp:useBean>創建它. <jsp:getProperty>元素有一些限制: 你不能使用<jsp:getProperty>來檢索一個已經被索引了的屬性 你能夠和JavaBeans組件一起使用<jsp:getProperty>,但是不能與Enterprise Bean一起使用。 屬性 name="beanInstanceName" bean的名字,由<jsp:useBean>指定 property="propertyName" 所指定的Bean的屬性名。 技巧: 在sun的JSP參考中提到，如果你使用<jsp:getProperty>來檢索的值是空值，那么NullPointerException將會出現，同時如果使用程序段或表達式來檢索其值，那么在瀏覽器上出現的是null（空). jsp:getProperty Action 語法： 　　<jsp:getProperty name="beanInstanceName" property="propertyName" /> 　　這個屬性檢索出bean的屬性的值并將之轉化為一個字符串，然后將之插入到輸出。它有兩個必選屬性：name，在之前用jsp:useBean引入的名稱，property，必須被插入值的屬性。

java.util.*;

public class ShowDate {

public static void main(String[] args) {
Calendar calendar = new GregorianCalendar();
Date trialTime = new Date();
calendar.setTime(trialTime);

// print out a bunch of interesting things
System.out.println("ERA: " + calendar.get(Calendar.ERA));
System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
System.out.println("DATE: " + calendar.get(Calendar.DATE));
System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));

System.out.println("Current Time, with hour reset to 3");
calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
calendar.set(Calendar.HOUR, 3);
System.out.println("ERA: " + calendar.get(Calendar.ERA));
System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
System.out.println("DATE: " + calendar.get(Calendar.DATE));
System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); // in hours
System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours
}

}


import java.text.DateFormat;
import java.util.*;

public class JspCalendar {
??? Calendar? calendar = null;

??? public JspCalendar() {
?calendar = Calendar.getInstance();
?Date trialTime = new Date();
?calendar.setTime(trialTime);
??? }

??? public int getYear() {
?return calendar.get(Calendar.YEAR);
??? }
???
??? public String getMonth() {
?int m = getMonthInt();
?String[] months = new String [] { "January", "February", "March",
?????"April", "May", "June",
?????"July", "August", "September",
?????"October", "November", "December" };
?if (m > 12)
???? return "Unknown to Man";
?
?return months[m - 1];

??? }

??? public String getDay() {
?int x = getDayOfWeek();
?String[] days = new String[] {"Sunday", "Monday", "Tuesday", "Wednesday",
????????? "Thursday", "Friday", "Saturday"};

?if (x > 7)
???? return "Unknown to Man";

?return days[x - 1];

??? }
???
??? public int getMonthInt() {
?return 1 + calendar.get(Calendar.MONTH);
??? }

??? public String getDate() {
?return getMonthInt() + "/" + getDayOfMonth() + "/" +? getYear();

??? }

??? public String getTime() {
?return getHour() + ":" + getMinute() + ":" + getSecond();
??? }

??? public int getDayOfMonth() {
?return calendar.get(Calendar.DAY_OF_MONTH);
??? }

??? public int getDayOfYear() {
?return calendar.get(Calendar.DAY_OF_YEAR);
??? }

??? public int getWeekOfYear() {
?return calendar.get(Calendar.WEEK_OF_YEAR);
??? }

??? public int getWeekOfMonth() {
?return calendar.get(Calendar.WEEK_OF_MONTH);
??? }

??? public int getDayOfWeek() {
?return calendar.get(Calendar.DAY_OF_WEEK);
??? }
????
??? public int getHour() {
?return calendar.get(Calendar.HOUR_OF_DAY);
??? }
???
??? public int getMinute() {
?return calendar.get(Calendar.MINUTE);
??? }

??? public int getSecond() {
?return calendar.get(Calendar.SECOND);
??? }

??? public static void main(String args[]) {
?JspCalendar db = new JspCalendar();
?p("date: " + db.getDayOfMonth());
?p("year: " + db.getYear());
?p("month: " + db.getMonth());
?p("time: " + db.getTime());
?p("date: " + db.getDate());
?p("Day: " + db.getDay());
?p("DayOfYear: " + db.getDayOfYear());
?p("WeekOfYear: " + db.getWeekOfYear());
?p("era: " + db.getEra());
?p("ampm: " + db.getAMPM());
?p("DST: " + db.getDSTOffset());
?p("ZONE Offset: " + db.getZoneOffset());
?p("TIMEZONE: " + db.getUSTimeZone());
??? }

??? private static void p(String x) {
?System.out.println(x);
??? }

??? public int getEra() {
?return calendar.get(Calendar.ERA);
??? }

??? public String getUSTimeZone() {
?String[] zones = new String[] {"Hawaii", "Alaskan", "Pacific",
?????????? "Mountain", "Central", "Eastern"};
?
?return zones[10 + getZoneOffset()];
??? }

??? public int getZoneOffset() {
?return calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000);
??? }

??? public int getDSTOffset() {
?return calendar.get(Calendar.DST_OFFSET)/(60*60*1000);
??? }

???
??? public int getAMPM() {
?return calendar.get(Calendar.AM_PM);
??? }
}

<jsp:useBean id=“calculator“ scope=“request“ class=“com.jspdev.SimpleCalculator“>
<jsp:setProperty name=“calculator“ property=“*“/>
</jsp:useBean>

(1)property=”*”
設置Bean 屬性的快捷方式，在Bean 中屬性的名字，類型必須和request對象中的參數名稱相匹配。由于表單中傳過來的數據類型都是String 類型的，Jsp內在機制會把這些參數轉化成Bean屬性對應的類型。
(2)property=“propertyName“
使用request對象中的一個參數值來指定Bean中的一個屬性值。在這個語法中，property指定Bean 的屬性名，而且Bean 屬性和request參數的名字應相同。也就是說，如果在Bean 中有setUserName(String userName)方法，那么，propertyName的值就是“userName“

<jsp:setProperty name="Name" property="*" />
根據已提交表單中的數據，設置這個javaBean中相應的屬性值。
*:JavaBean屬性的名稱和表單對象的名稱相同時才能夠賦值
<jsp:setProperty name="Name" property="propertyName" value="PropertyValue" | param="ParameterName" />
把JavaBean指定的屬性設為指定的值

jsp:setProperty用來設置Bean的屬性值。
有兩種方法使用
1。在jsp:useBean之后2。在jsp:useBean實體這中間有區別的第一種情況jsp:setProperty
不管是新生成的實例還是原來的對象，都會進行
2。只有在新生成的情況下才可以執行
<jsp:setProperty>中的name?應該和jsp:useBean中的id一樣的
property="*"?表示用用戶輸入的所有值來匹配Bean中的屬性，當然你也可以指定的