<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">角色代码</td>
       <td class="column">角色描述</td>      

    </tr>

    <!-- 循环显示列表userRoles的每一项，并判断如果数据库中已有的打勾<c:if test标签正确才执行中间的代码-->
    <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>

控制器代码：
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;
       
        // 记录父列表ID
        result.put("parentlistID", request.getParameter("parentlistID"));
        result.put("userInfo", userInfo);
        
         //遍历所有map里的key
        Iterator it = result.keySet().iterator();
        while (it.hasNext())
        {
            String key = (String) it.next();
            request.setAttribute(key, result.get(key));
        }
        
         //这里就是从列表多选框传过来的数值。根据name属性获得所有的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());

      //先删除数据库中所有的，再插入所选的值
         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不能传递参数，可在这里直接有response导向别的页面
         response.sendRedirect(request.getContextPath()
           + "/sys/userRolesList.htm?userID=" + userInfo.getSuinId().toString());
         return null;
        }

 }

1. StringTokenizer(String str) ：构造一个用来解析str的StringTokenizer对象。java默认的分隔符是“空格”、“制表符(‘\t’)”、“换行符(‘\n’)”、“回车符(‘\r’)”。
2. StringTokenizer(String str, String delim) ：构造一个用来解析str的StringTokenizer对象，并提供一个指定的分隔符。
3. StringTokenizer(String str, String delim, boolean returnDelims) ：构造一个用来解析str的StringTokenizer对象，并提供一个指定的分隔符，同时，指定是否返回分隔符。

1. int countTokens() ：返回nextToken方法被调用的次数。如果采用构造函数1和2，返回的就是分隔符数量(例2)。
2. boolean hasMoreTokens() ：返回是否还有分隔符。
3. boolean hasMoreElements() ：结果同2。
4. String nextToken() ：返回从当前位置到下一个分隔符的字符串。
5. Object nextElement() ：结果同4。
6. String nextToken(String delim) ：与4类似，以指定的分隔符返回结果。

		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() );
　　　　　　　　　　　}
结果为：
Token Total: 10
The
Java
platform
is
the
ideal
platform
for
network
computing

		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() );
		}
结果为：
Token Total: 19
The
=
Java
=
platform
=
is
=
the
=
ideal
=
platform
=
for
=
network
=
computing

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);
    }
}