Flex怎么与数据库进行交互？

Flex最近学了，但是感觉使用Flex与数据库交互，是可以互相传值调用，但是感觉都是同步的。我的按钮一按，他就响应。我传的也只是一个属性而已，也不是一个model。谁有可以传递一个对象的完整实例？学习！

下面这个不是完全懂，谁能给个完整的？

对于建立一个flex web应用的步骤我就不多说了哈。

首先要求大家到数据库建立一个数据库，在我这例子中数据库名为userDb，建立一个表userInfo，里面设置两个字段一个为id，一个为name.第二，创建以下java代码在src目录下

User.java
package org.rjb.java;

public class User {
private String name;

public String getName() {
return name;
}
public void setName(String name) {
this .name = name;
}
}

UserDao.java
package org.rjb.java;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

public class UserDao {

public static Connection getConnection() {
Connection c = null ;
try {
String driver = " com.mysql.jdbc.Driver " ;
String url = " jdbc:mysql://localhost:3306/userDb " ;
String username = " root " ;
String password = " 1235 " ;
Class.forName(driver);
c = DriverManager.getConnection(url,username,password);
} catch (Exception e) {
System.out.println(e.getMessage());
}
return c;
}
public List getAllUser() throws SQLException {
Connection c = getConnection();
Statement st = c.createStatement();
ResultSet rs = st.executeQuery( " select * from UserInfo " );
ArrayList userList = new ArrayList < User > ();
while (rs.next()) {
User u = new User();
u.setName(rs.getString( " name " ));
userList.add(u);
}
return userList;
}

}

以上是java端的全部代码了，下面是flex端的代码。

第三，创建以下代码在flex_src下：

User.as
package org.rjb.flex
{
[RemoteClass(alias = " org.rjb.java.User " )]
public class User
{
private var _name:String;
public function User()
{
}
public function get name():String {
return this ._name;
}
public function set name(name:String): void {
this ._name = name;
}
}
}

User.as
package org.rjb.flex
{
[RemoteClass(alias = " org.rjb.java.User " )]
public class User
{
private var _name:String;
public function User()
{
}
public function get name():String {
return this ._name;
}
public function set name(name:String): void {
this ._name = name;
}
}
}

接下来是mxml代码，也就是我们真正展示我们数据的界面

FlexWithJava .mxml
<? xml version="1.0" encoding="utf-8" ?>
< mx:Application xmlns:mx ="http://www.adobe.com/2006/mxml" layout ="vertical" >
< mx:RemoteObject id ="ud" destination ="UserDao" result ="onResult(event)" fault ="onFault()" />
< mx:DataGrid dataProvider ="{users}" >
< mx:columns >
< mx:DataGridColumn dataField ="name" headerText ="name" />
</ mx:columns >
</ mx:DataGrid >
< mx:Label id ="info" />
< mx:Button label ="click" click ="clickFun()" />
< mx:Script >
<![CDATA[
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
[Bindable]
public var users:ArrayCollection=new ArrayCollection();
public function clickFun():void{
ud.getAllUser();
}
public function onResult(event:ResultEvent):void{
users=ArrayCollection(event.result);
info.text="get data successfully";
}
public function onFault():void{
info.text="Error";
}
]]>
</ mx:Script >
</ mx:Application >

第四，配置remoting-config.xml，在里面加上如下配置文件：

< destination id ="UserDao" >
< properties >
< source > org.rjb.java.UserDao </ source >
</ properties >
</ destination >