上一篇我主要介紹dwr的概況。這一篇我用dwr做了個可以不刷新頁面就更新的表格。
運行環(huán)境：
windows xp pro sp2
j2sdk1.2.4_03
weblogic8.1
struts1.2.4
開發(fā)工具eclipse3.0
其實dwr和struts沒有什么關(guān)系，只不過最近我們項目組在用struts作東西。我就順便用把我的程序建立在Struts上。
主要文件。
dwr.jar--dwr的類庫包
struts的類庫包，具體我不說了，這東西誰都知道。
jdts0.9.jar--數(shù)據(jù)庫SQLServer的驅(qū)動程序包。
以上jar包放在WebContent\WEB-INF\lib下
web.xml--誰都知道這東西干嘛用的吧。
struts-config.xml --這個也不說了。
dwr.xml -- dwr的配置文件
weblogic.xml -- weblogic模塊配置文件。
還有一個struts的tld就不說了
以上文件放在WebContent\WEB-INF下面。
login.jsp -- 登陸界面，這里我也用到了dwr
showtable.jsp --登陸成功會轉(zhuǎn)到這個頁面，一個ajax表格。
showtable.js -- showtable.jsp中用到的javascript
main.css -- 不說了
還有 *.gif界面要到的圖片
以上文件放在WebContent下
剩下的就是java類了。
LoginAction.java --Struts的Action，負(fù)責(zé)登陸
TableAction.java --Struts的Action，負(fù)責(zé)表格內(nèi)容初始化
UserLogic.java --負(fù)責(zé)驗證用戶
TableRowConverter.java -- 繼承于dwr的BeanConverter，負(fù)責(zé)將一個對象轉(zhuǎn)成javascript能用的東西。
LoginForm.java --Struts的Form，負(fù)責(zé)登陸信息
TableModelBean.java --TableModel一部分給struts用一部分給dwr用。
TableRowBean.java 用戶存放行信息的Bean。
ModelOneDAO.java --隨便取的名字，有點惡（三聲）。負(fù)責(zé)從數(shù)據(jù)庫操作的。
這個例子還需要一個數(shù)據(jù)庫，我用的是SQLServer。
下面是建表的SQL語句。輸入數(shù)據(jù)的SQL就不貼了太長了。我會弄個源碼下載的。
/*==============================================================*/
/*?DBMS?name:??????Microsoft?SQL?Server?2000????????????????????*/
/*?Created?on:?????2005-8-1?13:21:33????????????????????????????*/
/*==============================================================*/
if?exists?(select?1
????????????from??sysobjects
???????????where??id?=?object_id('AJAX_MODEL_ONE')
????????????and???type?=?'U')
???drop?table?AJAX_MODEL_ONE
go
/*==============================================================*/
/*?Table:?AJAX_MODEL_ONE????????????????????????????????????????*/
/*==============================================================*/
create?table?AJAX_MODEL_ONE?(
???col1?????????????????int??????????????????not?null,
???col2?????????????????int??????????????????not?null,
???col3?????????????????int??????????????????not?null,
???constraint?PK_AJAX_MODEL_ONE?primary?key??(col1)
)
go
Login.java
  /**//*
 ?*?Created?on?2005-7-29
?*
?*?TODO?To?change?the?template?for?this?generated?file?go?to
?*?Window?-?Preferences?-?Java?-?Code?Style?-?Code?Templates
 ?*/
 package?org.mstar.strutsajax.action;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.http.HttpServletResponse;
import?org.apache.struts.action.Action;
import?org.apache.struts.action.ActionForm;
import?org.apache.struts.action.ActionForward;
import?org.apache.struts.action.ActionMapping;
import?org.mstar.strutsajax.ajax.UserLogic;
import?org.mstar.strutsajax.form.LoginForm;
/**//**
?*?@author?matianyi
?*
?*?TODO?To?change?the?template?for?this?generated?type?comment?go?to
?*?Window?-?Preferences?-?Java?-?Code?Style?-?Code?Templates
?*/
public?class?LoginAction?extends?Action? {
  ????/**//*?(non-Javadoc)
?????*?@see?org.apache.struts.action.Action＃e xecute(org.apache.struts.action.ActionMapping,?org.apache.struts.action.ActionForm,?javax.servlet.http.HttpServletRequest,?javax.servlet.http.HttpServletResponse)
 ?????*/
????public?ActionForward?execute(ActionMapping?mapping,?ActionForm?form,
????????????HttpServletRequest?request,?HttpServletResponse?response)?throws?Exception?{
????????if(validateUser((LoginForm)form)){
????????????return?mapping.findForward("success");????????????
????????}?else?{
????????????return?mapping.findForward("failure");
????????}????????
????}
????
????private?boolean?validateUser(LoginForm?form){
????????UserLogic?userLogic?=?new?UserLogic();
????????return?userLogic.validate(form.getUsername(),form.getPassword());????????
????}
}package?org.mstar.strutsajax.ajax;
/**//**
?*?@author?matianyi
?*
?*?TODO?To?change?the?template?for?this?generated?type?comment?go?to
?*?Window?-?Preferences?-?Java?-?Code?Style?-?Code?Templates
?*/
public?class?UserLogic?{
????public?boolean?validate(String?username,String?password){
????????if("mty".equals(username)&&"123".equals(password)){
????????????return?true;
????????}?else?{
????????????return?false;
????????}
????}
}
|
TableRowBean.java
package?org.mstar.strutsajax.form;
/**//**
?*?@author?matianyi
?*
?*?TODO?To?change?the?template?for?this?generated?type?comment?go?to
?*?Window?-?Preferences?-?Java?-?Code?Style?-?Code?Templates
?*/
public?class?TableRowBean{
????private?String?col1Value;
????private?String?col2Value;
????private?String?col3Value;
????
????/**//**
?????*?@return?Returns?the?col1Value.
?????*/
????public?String?getCol1Value()?{
????????return?col1Value;
????}
????/**//**
?????*?@param?col1Value?The?col1Value?to?set.
?????*/
????public?void?setCol1Value(String?col1Value)?{
????????this.col1Value?=?col1Value;
????}
????/**//**
?????*?@return?Returns?the?col2Value.
?????*/
????public?String?getCol2Value()?{
????????return?col2Value;
????}
????/**//**
?????*?@param?col2Value?The?col2Value?to?set.
?????*/
????public?void?setCol2Value(String?col2Value)?{
????????this.col2Value?=?col2Value;
????}
????/**//**
?????*?@return?Returns?the?col3Value.
?????*/
????public?String?getCol3Value()?{
????????return?col3Value;
????}
????/**//**
?????*?@param?col3Value?The?col3Value?to?set.
?????*/
????public?void?setCol3Value(String?col3Value)?{
????????this.col3Value?=?col3Value;
????}
} 上面的代碼都比較簡單，不用說大家也都知道是干什么用的。
下面就是主要的內(nèi)容了。預(yù)知后事如何，且聽下回分解。
posted on 2006-05-18 13:48
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