Posted on 2007-11-12 22:32
leekiang 閱讀(952)
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dwr
1，在jsp引入以下js,其中custService是自己命的名
<script type='text/javascript' src='<%=request.getContextPath() %>/dwr/engine.js'> </script>
??? <script type='text/javascript' src='<%=request.getContextPath() %>/dwr/util.js'> </script>
??? <script type='text/javascript' src='<%=request.getContextPath() %>/dwr/interface/custService.js'> </script>
???
2，在web.xml配置
<servlet>
??? <servlet-name>dwr-invoker</servlet-name>
???? <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
??? <init-param>
????? <param-name>debug</param-name>
????? <param-value>true</param-value>
??? </init-param>
??? <init-param>
????? <param-name>activeReverseAjaxEnabled</param-name>
????? <param-value>true</param-value>
??? </init-param>
??? <init-param>
????? <param-name>initApplicationScopeCreatorsAtStartup</param-name>
????? <param-value>true</param-value>
??? </init-param>
??? <init-param>
????? <param-name>maxWaitAfterWrite</param-name>
????? <param-value>100</param-value>
??? </init-param>
??? <!--
??? <init-param>
????? <param-name>org.directwebremoting.extend.ServerLoadMonitor</param-name>
????? <param-value>org.directwebremoting.impl.PollingServerLoadMonitor</param-value>
??? </init-param>
??? -->
??? <load-on-startup>1</load-on-startup>
? </servlet>
? <servlet-mapping>
??? <servlet-name>dwr-invoker</servlet-name>
??? <url-pattern>/dwr/*</url-pattern>
? </servlet-mapping>
?
?3,dwr.xml,放在web-info下,其中 custService為spring中的bean名
?<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "<dwr>
?<allow>
??<create creator="spring" javascript="custService">
???<param name="beanName" value="custService" />
??</create>
?</allow>
</dwr>
4,
function refreshSelect(){
var type =$("seltype").value;
if('dept'==type){
getDeptList();
}
else if('xm'==type){
getXmList();
}
}
function getDeptList() {
? custService.getDeptList(function(data) {
? var deptlist =document.getElementById("selectlist");
dwr.util.removeAllOptions("selectlist");
? dwr.util.addOptions("selectlist",data);
? });
}
function getXmList() {
? custService.getXmList(function(data) {
? var deptlist =document.getElementById("selectlist");
dwr.util.removeAllOptions("selectlist"); //dwrutil的特有方法
? dwr.util.addOptions("selectlist",data); //
? });
}
5,spring中service的方法:
?public Map getDeptList() {
??? Map map = new TreeMap();//排序，不用Hashmap
?? map.put("", "選擇一個部門");
??List l = this.typeService
????.getList("from Dept a where a.enabled = '0' order by a.ordernum");
??for (Iterator iterator = l.iterator(); iterator.hasNext();) {
???Dept?d = (Dept) iterator.next();
???map.put(d.getDeptid(), d.getDeptname());
??}
??return map;
?}
?
6,
<select name="" id="seltype" onchange="refreshSelect();">
????????????<option value="">
?????????????--選擇方式--
????????????</option>
????????????<option value="xm">
?????????????按項目
????????????</option>
????????????<option value="dept">
?????????????按部門
????????????</option>
???????????</select>
7,返回為布爾類型的處理
<script? type="text/javascript">
??? function showResult(b) {//b為布爾值
??????? if (b) {
??????????? alert("已經有重復的登錄名了！");
??????? } else {
??????????? alert("登錄名尚未注冊過！");
??????? }
??? }function checkRepeat(s) {
??????? var o = document.getElementById(s);
??????? if (o) {
??????????? UserManager.getUser(o.value, showResult);//js不允許重載
??????? }
??? }
?
</script>
<input type="text" name="user" id="user">
<input type="button" onclick="checkRepeat('user')" value="檢查是否重復">
public boolean getUser(String username)
{
??? String sql="select count(*) from user where userName=? ";
?int i=getJdbcTemplate().queryForInt(sql,new Object[]{username});
??? if(i>0)
??? return true;
??????? else
???? return false;
}
?