flex与java实现增删改查

用的是MySQL数据库。

1，建一个userdb库，再建userinfo表，字段：id(int),username(varchar),password(varchar)。

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create database userdb;
use userdb;
create table userinfo(
id int(10) not null auto_increment,
username varchar(20),
password varchar(20),
primary key(id));

create database userdb; use userdb; create table userinfo( id int(10) not null auto_increment, username varchar(20), password varchar(20), primary key(id));

2，DBConnection.java

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package com.datainfo;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DBConnection {
public static Connection getConnection() throws ClassNotFoundException,
SQLException {
Connection conn = null;
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/userdb";
String username = "root";
String password = "mysql";
Class.forName(driver);
conn = DriverManager.getConnection(url, username, password);
return conn;
}
}

package com.datainfo; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class DBConnection { public static Connection getConnection() throws ClassNotFoundException, SQLException { Connection conn = null; String driver = "com.mysql.jdbc.Driver"; String url = "jdbc:mysql://localhost:3306/userdb"; String username = "root"; String password = "mysql"; Class.forName(driver); conn = DriverManager.getConnection(url, username, password); return conn; } }

3，User.java

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package com.datainfo;
public class User {
private int id;
private String username;
private String password;
public User() {
}
/**
* @return the id
*/
public int getId() {
return id;
}
/**
* @param id
* the id to set
*/
public void setId(int id) {
this.id = id;
}
/**
* @return the username
*/
public String getUsername() {
return username;
}
/**
* @param username
* the username to set
*/
public void setUsername(String username) {
this.username = username;
}
/**
* @return the password
*/
public String getPassword() {
return password;
}
/**
* @param password
* the password to set
*/
public void setPassword(String password) {
this.password = password;
}
}

package com.datainfo; public class User { private int id; private String username; private String password; public User() { } /** * @return the id */ public int getId() { return id; } /** * @param id * the id to set */ public void setId(int id) { this.id = id; } /** * @return the username */ public String getUsername() { return username; } /** * @param username * the username to set */ public void setUsername(String username) { this.username = username; } /** * @return the password */ public String getPassword() { return password; } /** * @param password * the password to set */ public void setPassword(String password) { this.password = password; } }

4，UserDAO.java

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package com.datainfo;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import com.datainfo.DBConnection;
public class UserDAO {
public ArrayList getUserList() throws ClassNotFoundException, SQLException {
Connection conn = DBConnection.getConnection();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("select * from userinfo");
ArrayList userList = null;
try {
userList = new ArrayList();
while (rs.next()) {
User user = new User();
user.setId(rs.getInt("id"));
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
userList.add(user);
}
rs.close();
stmt.close();
conn.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return userList;
}
public void addUser(User user) throws ClassNotFoundException, SQLException {
Connection conn = DBConnection.getConnection();
String sql = "insert into userinfo (username,password) values (?,?)";
try {
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setString(1, user.getUsername());
pstmt.setString(2, user.getPassword());
pstmt.executeUpdate();
pstmt.close();
conn.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void updataUser(User user) throws ClassNotFoundException,
SQLException {
Connection conn = DBConnection.getConnection();
String sql = "update userinfo set username=?,password=? where id=?";
try {
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setString(1, user.getUsername());
pstmt.setString(2, user.getPassword());
pstmt.setInt(3, user.getId());
pstmt.executeUpdate();
pstmt.close();
conn.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void deleteUser(User user) throws ClassNotFoundException,
SQLException {
Connection conn = DBConnection.getConnection();
String sql = "delete from userinfo where id =?";
try {
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setInt(1, user.getId());
pstmt.executeUpdate();
pstmt.close();
conn.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

package com.datainfo; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import com.datainfo.DBConnection; public class UserDAO { public ArrayList getUserList() throws ClassNotFoundException, SQLException { Connection conn = DBConnection.getConnection(); Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery("select * from userinfo"); ArrayList userList = null; try { userList = new ArrayList(); while (rs.next()) { User user = new User(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); userList.add(user); } rs.close(); stmt.close(); conn.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return userList; } public void addUser(User user) throws ClassNotFoundException, SQLException { Connection conn = DBConnection.getConnection(); String sql = "insert into userinfo (username,password) values (?,?)"; try { PreparedStatement pstmt = conn.prepareStatement(sql); pstmt.setString(1, user.getUsername()); pstmt.setString(2, user.getPassword()); pstmt.executeUpdate(); pstmt.close(); conn.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void updataUser(User user) throws ClassNotFoundException, SQLException { Connection conn = DBConnection.getConnection(); String sql = "update userinfo set username=?,password=? where id=?"; try { PreparedStatement pstmt = conn.prepareStatement(sql); pstmt.setString(1, user.getUsername()); pstmt.setString(2, user.getPassword()); pstmt.setInt(3, user.getId()); pstmt.executeUpdate(); pstmt.close(); conn.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void deleteUser(User user) throws ClassNotFoundException, SQLException { Connection conn = DBConnection.getConnection(); String sql = "delete from userinfo where id =?"; try { PreparedStatement pstmt = conn.prepareStatement(sql); pstmt.setInt(1, user.getId()); pstmt.executeUpdate(); pstmt.close(); conn.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

5，配置文件remoting-config.xml

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<?xml version="1.0" encoding="UTF-8"?>
<service id="remoting-service" class="flex.messaging.services.RemotingService">
<adapters>
<adapter-definition id="java-object"
class="flex.messaging.services.remoting.adapters.JavaAdapter"
default="true" />
</adapters>
<default-channels>
<channel ref="my-amf" />
</default-channels>
<destination id="userDao">
<properties>
<source>com.datainfo.UserDAO</source>
</properties>
</destination>
</service>

<?xml version="1.0" encoding="UTF-8"?> <service id="remoting-service" class="flex.messaging.services.RemotingService"> <adapters> <adapter-definition id="java-object" class="flex.messaging.services.remoting.adapters.JavaAdapter" default="true" /> </adapters> <default-channels> <channel ref="my-amf" /> </default-channels> <destination id="userDao"> <properties> <source>com.datainfo.UserDAO</source> </properties> </destination> </service>

6，以下是flex端，UserFlex.as

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package com.flex
{
[Bindable]
[RemoteClass(alias="com.datainfo.User")]
public class UserFlex
{
// public function UserFlex{
//
// }
public var id:int;
public var username:String;
public var password:String;
// 如果用private，就需要写上get/set
//
// public function get id():int{
// return this.id;
// }
// public function set id():int{
// this.id = id;
// }
//
// public function get username():String{
// return this.username;
// }
// public function set username():String{
// this.username = username;
// }
//
// public function get password():String{
// return this.password;
// }
// public function set password():String{
// this.password = password;
// }
}
}

package com.flex { [Bindable] [RemoteClass(alias="com.datainfo.User")] public class UserFlex { // public function UserFlex{ // // } public var id:int; public var username:String; public var password:String; // 如果用private，就需要写上get/set // // public function get id():int{ // return this.id; // } // public function set id():int{ // this.id = id; // } // // public function get username():String{ // return this.username; // } // public function set username():String{ // this.username = username; // } // // public function get password():String{ // return this.password; // } // public function set password():String{ // this.password = password; // } } }

7，自定义的DataGrid组件，用以双击修改数据DoubleClickDataGrid.as

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package com.flex
{
import flash.events.MouseEvent;
import mx.controls.DataGrid;
import mx.controls.dataGridClasses.DataGridColumn;
import mx.controls.listClasses.IDropInListItemRenderer;
import mx.controls.listClasses.IListItemRenderer;
import mx.core.EventPriority;
import mx.events.DataGridEvent;
public class DoubleClickDataGrid extends DataGrid
{
public function DoubleClickDataGrid()
{
//TODO: implement function
super();
doubleClickEnabled = true;
}
override protected function mouseDoubleClickHandler(event:MouseEvent):void
{
var dataGridEvent:DataGridEvent;
var r:IListItemRenderer;
var dgColumn:DataGridColumn;
r = mouseEventToItemRenderer(event);
if (r && r != itemEditorInstance)
{
var dilr:IDropInListItemRenderer = IDropInListItemRenderer(r);
if (columns[dilr.listData.columnIndex].editable)
{
dgColumn = columns[dilr.listData.columnIndex];
dataGridEvent = new DataGridEvent(DataGridEvent.ITEM_EDIT_BEGINNING, false, true);
// ITEM_EDIT events are cancelable
dataGridEvent.columnIndex = dilr.listData.columnIndex;
dataGridEvent.dataField = dgColumn.dataField;
dataGridEvent.rowIndex = dilr.listData.rowIndex + verticalScrollPosition;
dataGridEvent.itemRenderer = r;
dispatchEvent(dataGridEvent);
}
}
super.mouseDoubleClickHandler(event);
}
override protected function mouseUpHandler(event:MouseEvent):void
{
var r:IListItemRenderer;
var dgColumn:DataGridColumn;
r = mouseEventToItemRenderer(event);
if (r)
{
var dilr:IDropInListItemRenderer = IDropInListItemRenderer(r);
if (columns[dilr.listData.columnIndex].editable)
{
dgColumn = columns[dilr.listData.columnIndex];
dgColumn.editable = false;
}
}
super.mouseUpHandler(event);
if (dgColumn)
dgColumn.editable = true;
}
}
}

package com.flex { import flash.events.MouseEvent; import mx.controls.DataGrid; import mx.controls.dataGridClasses.DataGridColumn; import mx.controls.listClasses.IDropInListItemRenderer; import mx.controls.listClasses.IListItemRenderer; import mx.core.EventPriority; import mx.events.DataGridEvent; public class DoubleClickDataGrid extends DataGrid { public function DoubleClickDataGrid() { //TODO: implement function super(); doubleClickEnabled = true; } override protected function mouseDoubleClickHandler(event:MouseEvent):void { var dataGridEvent:DataGridEvent; var r:IListItemRenderer; var dgColumn:DataGridColumn; r = mouseEventToItemRenderer(event); if (r && r != itemEditorInstance) { var dilr:IDropInListItemRenderer = IDropInListItemRenderer(r); if (columns[dilr.listData.columnIndex].editable) { dgColumn = columns[dilr.listData.columnIndex]; dataGridEvent = new DataGridEvent(DataGridEvent.ITEM_EDIT_BEGINNING, false, true); // ITEM_EDIT events are cancelable dataGridEvent.columnIndex = dilr.listData.columnIndex; dataGridEvent.dataField = dgColumn.dataField; dataGridEvent.rowIndex = dilr.listData.rowIndex + verticalScrollPosition; dataGridEvent.itemRenderer = r; dispatchEvent(dataGridEvent); } } super.mouseDoubleClickHandler(event); } override protected function mouseUpHandler(event:MouseEvent):void { var r:IListItemRenderer; var dgColumn:DataGridColumn; r = mouseEventToItemRenderer(event); if (r) { var dilr:IDropInListItemRenderer = IDropInListItemRenderer(r); if (columns[dilr.listData.columnIndex].editable) { dgColumn = columns[dilr.listData.columnIndex]; dgColumn.editable = false; } } super.mouseUpHandler(event); if (dgColumn) dgColumn.editable = true; } } }

8，页面显示，testflex.mxml

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<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:locdg="com.flex.*"
creationComplete="initApp()"
minWidth="955" minHeight="600">
<fx:Declarations>
<s:RemoteObject id="userdata" destination="userDao" result="onResult(event)" fault="onFault(event)" />
<s:RemoteObject id="adduserdata" destination="userDao" result="addResult(event)" fault="addFault(event)" />
<s:RemoteObject id="updatauserdata" destination="userDao" result="updataResult(event)" fault="updataFault(event)" />
<s:RemoteObject id="deleteuserdata" destination="userDao" result="deleteResult(event)" fault="deleteFault(event)" />
</fx:Declarations>
<fx:Script>
<!--[CDATA[
import com.flex.UserFlex;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.managers.CursorManager;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
public var userFlex:UserFlex = new UserFlex();
public var result:Object = new Object();
[Bindable]
public var users:ArrayCollection = new ArrayCollection();
public function initApp():void{
// userdata.getUserList();
}
public function click_handler(event:Event):void{
CursorManager.setBusyCursor();
info.text = "正在查询...";
userdata.getUserList();
}
public function adduser_handler(event:Event):void{
if(username.text != "" && password.text != ""){
CursorManager.setBusyCursor();
addinfo.text = "正在添加...";
userFlex.username = username.text;
userFlex.password = password.text;
adduserdata.addUser(userFlex);
}else{
addinfo.text = " 用户名和密码不能为空";
}
}
public function updataUser(event:Event):void{
if(userlist.selectedItem.username != "" && userlist.selectedItem.password != ""){
CursorManager.setBusyCursor();
info.text = "正在更新...";
userFlex.id = userlist.selectedItem.id;
userFlex.username = userlist.selectedItem.username;
userFlex.password = userlist.selectedItem.password;
updatauserdata.updataUser(userFlex);
}
// Alert.show("确认修改？");
}
public function deleteUser(event:Event):void{
CursorManager.setBusyCursor();
info.text = "正在正在删除...";
userFlex.id = userlist.selectedItem.id;
deleteuserdata.deleteUser(userFlex);
}
public function onResult(event:ResultEvent):void{
users = event.result as ArrayCollection;
CursorManager.removeBusyCursor();
if(users.length==0){
info.text="取数据成功，为空";
}else{
info.text = " 取数据成功";
}
}
public function onFault(event:FaultEvent):void{
CursorManager.removeBusyCursor();
info.text="取数据失败";
}
public function addResult(event:ResultEvent):void{
CursorManager.removeBusyCursor();
userdata.getUserList();
username.text = "";
password.text = "";
addinfo.text = " 添加成功";
// info.text = "取数据成功";
}
public function addFault(event:FaultEvent):void{
CursorManager.removeBusyCursor();
addinfo.text="添加失败";
}
public function updataResult(event:ResultEvent):void{
CursorManager.removeBusyCursor();
userdata.getUserList();
info.text = "修改数据成功";
}
public function updataFault(event:FaultEvent):void{
CursorManager.removeBusyCursor();
info.text="修改数据失败";
}
public function deleteResult(event:ResultEvent):void{
CursorManager.removeBusyCursor();
userdata.getUserList();
info.text = "刪除数据成功";
}
public function deleteFault(event:FaultEvent):void{
CursorManager.removeBusyCursor();
info.text="刪除数据失败";
}
]]-->
</fx:Script>
<locdg:DoubleClickDataGrid x="61" y="189" id="userlist" dataProvider="{users}" editable="true">
<locdg:columns>
<mx:DataGridColumn headerText="ID号" dataField="id" editable="false"/>
<mx:DataGridColumn headerText="账号" dataField="username" editable="true"/>
<mx:DataGridColumn headerText="密码" dataField="password" editable="true"/>
<mx:DataGridColumn headerText="修改" width="50" editable="false" >
<mx:itemRenderer>
<fx:Component>
<mx:LinkButton toolTip="修改" click="outerDocument.updataUser(event)" icon="@Embed('/image/update.gif')">
</mx:LinkButton>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="删除" width="50" editable="false" >
<mx:itemRenderer>
<fx:Component>
<mx:LinkButton toolTip="删除" click="outerDocument.deleteUser(event)" icon="@Embed('/image/delete.gif')">
</mx:LinkButton>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
</locdg:columns>
</locdg:DoubleClickDataGrid>
<s:Button x="491" y="189" label="取数据" click="click_handler(event)" />
<s:RichText x="606" y="189" id="info" text="点击按钮取数据"/>
<mx:Form x="163" y="72" borderStyle="solid" borderVisible="true">
<mx:FormItem label="用户名" borderStyle="solid" borderVisible="true">
<s:TextInput id="username" />
</mx:FormItem>
<mx:FormItem label="密码" borderStyle="solid" borderVisible="true">
<s:TextInput id="password"/>
</mx:FormItem>
</mx:Form>
<s:Button x="444" y="100" label="添加" click="adduser_handler(event)"/>
<s:RichText x="544" y="100" id="addinfo" text="请添加"/>
</s:Application>

<?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:locdg="com.flex.*" creationComplete="initApp()" minWidth="955" minHeight="600"> <fx:Declarations>  <s:RemoteObject id="userdata" destination="userDao" result="onResult(event)" fault="onFault(event)" />  <s:RemoteObject id="adduserdata" destination="userDao" result="addResult(event)" fault="addFault(event)" /> <s:RemoteObject id="updatauserdata" destination="userDao" result="updataResult(event)" fault="updataFault(event)" /> <s:RemoteObject id="deleteuserdata" destination="userDao" result="deleteResult(event)" fault="deleteFault(event)" /> </fx:Declarations> <fx:Script>  </fx:Script> <locdg:DoubleClickDataGrid x="61" y="189" id="userlist" dataProvider="{users}" editable="true"> <locdg:columns> <mx:DataGridColumn headerText="ID号" dataField="id" editable="false"/> <mx:DataGridColumn headerText="账号" dataField="username" editable="true"/> <mx:DataGridColumn headerText="密码" dataField="password" editable="true"/> <mx:DataGridColumn headerText="修改" width="50" editable="false" > <mx:itemRenderer> <fx:Component> <mx:LinkButton toolTip="修改" click="outerDocument.updataUser(event)" icon="@Embed('/image/update.gif')"> </mx:LinkButton> </fx:Component> </mx:itemRenderer> </mx:DataGridColumn> <mx:DataGridColumn headerText="删除" width="50" editable="false" > <mx:itemRenderer> <fx:Component> <mx:LinkButton toolTip="删除" click="outerDocument.deleteUser(event)" icon="@Embed('/image/delete.gif')"> </mx:LinkButton> </fx:Component> </mx:itemRenderer> </mx:DataGridColumn> </locdg:columns> </locdg:DoubleClickDataGrid> <s:Button x="491" y="189" label="取数据" click="click_handler(event)" /> <s:RichText x="606" y="189" id="info" text="点击按钮取数据"/> <mx:Form x="163" y="72" borderStyle="solid" borderVisible="true"> <mx:FormItem label="用户名" borderStyle="solid" borderVisible="true"> <s:TextInput id="username" /> </mx:FormItem> <mx:FormItem label="密码" borderStyle="solid" borderVisible="true"> <s:TextInput id="password"/> </mx:FormItem> </mx:Form> <s:Button x="444" y="100" label="添加" click="adduser_handler(event)"/> <s:RichText x="544" y="100" id="addinfo" text="请添加"/> </s:Application>

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