前幾天有網友要我寫一篇關於flex與資料庫交互的例子,一直由於時間緊沒能寫,今天晚上特地花點時間寫了個例子,希望能給大家一點幫助,其實flex與資料庫交互很簡單的,我主要是通過java與資料庫交互讀取數據,然後flex和java進行交互,把java讀取的數據在flex前端顯示出來,好了,說了一堆廢話,下面代碼說明問題.
對於建立一個flex web應用的步驟我就不多說了哈.
要求大家到資料庫建立一個資料庫,在我這例子中資料庫名為userDb,建立一個表userInfo,裡面設置兩個欄位一個為id,一個為name.第二,創建以下java代碼在src目錄下
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端的全部代碼了,下面是flex端的代碼.
第三,創建以下代碼在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.aspackage 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; } }} |
接下來是mxml代碼,也就是我們真正展示我們數據的界面
| 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,在裡面加上如下配置文件：
| <destination id="UserDao"> <properties> <source>org.rjb.java.UserDao</source> </properties> </destination> |
[火星人 ] Flex與java交互之資料庫數據讀取已經有348次圍觀
