flex3与java通信
flex与java通信可以使用HTTPService、RemoteObject。
HTTPService也可以有多种做法，text、xml、json等。
最简单的例子真接返回text：
flex_java.mxml
以get方式发送请求，request标签内是参数。
GetData.java
以json返回方式：
java端用json生成类的json字符串，发送到flex客户端，flex再解析json为flex的类，这要使用到java的json包和flex的json包，我用的是json-lib-2.2.2-jdk15.jar和as3corelib.swc。
login.mxml：
跟前面没什么两样，只是用json转了一下，都是按json接口来的，所以使用起来平台差异都不大。
传xml方式：
Servlet：
mxml：
RemoteObject方式：
先要安装lcds，在remoting-config.xml中加这个
Flex.mxml：
Agent.java：
环境配置有点麻烦，可以参考“Flex + LCDS + Java 入门教程”这个文档。
完成
HTTPService也可以有多种做法，text、xml、json等。
最简单的例子真接返回text：
flex_java.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" viewSourceURL="srcview/index.html">
<mx:HTTPService id="service" url="http://localhost:8888/flex_server/servlet/GetData" result="serviceRequest(event)"
method="GET" >
<mx:request xmlns="">
<name>
{n.text}
</name>
</mx:request>
</mx:HTTPService>
<mx:Script>
<![CDATA[
//当 HTTPService 调用成功返回时调度
private function serviceRequest(event:Event):void{
r.text=service.lastResult.toString();
}
private function send():void{
//发送请求
service.send();
}
]]>
</mx:Script>
<mx:Label text="姓名：" x="275" y="55" fontSize="16" fontWeight="bold"/>
<mx:TextInput id="n" x="367" y="58"/>
<mx:TextArea id="r" x="275" y="123" height="149" width="252" editable="false" fontSize="16" textAlign="center"/>
<mx:Label x="275" y="91" text="简介：" fontSize="16" fontWeight="bold"/>
<mx:Button x="367" y="94" label="查询" width="160" fontSize="15" fontWeight="bold" height="23" click="send()"/>
</mx:Application>
以get方式发送请求，request标签内是参数。
GetData.java
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class GetData extends HttpServlet {
public GetData() {
super();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name=request.getParameter("name");
response.setContentType("text/xml");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter() ;
if(name!=null&&!"".equals(name)){
if(name.equals("gao")){
out.print("这是个好人呀！");
}else if(name.equals("wang")){
out.print("坏人，很坏的人，不是人！");
}else{
out.print("外星人！！");
}
}
out.close();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
public void init() throws ServletException {
}
}
以json返回方式：
java端用json生成类的json字符串，发送到flex客户端，flex再解析json为flex的类，这要使用到java的json包和flex的json包，我用的是json-lib-2.2.2-jdk15.jar和as3corelib.swc。
login.mxml：
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:HTTPService id="form" result="returnResult(event)" resultFormat="text" url="http://localhost:8888/flex_server/LoginServlet">
<mx:request xmlns="">
<name>
{n.text}
</name>
<psw>
{p.text}
</psw>
</mx:request>
</mx:HTTPService>
<mx:Script>
<![CDATA[
import com.adobe.serialization.json.JSON;
import mx.rpc.events.ResultEvent;
private function returnResult(event:ResultEvent):void{
var person:Object=JSON.decode(event.result.toString());
t.text+=person.name;
t.text+=person.age;
t.text+=person.sex;
}
private function logins():void{
form.send();
}
]]>
</mx:Script>
<mx:TextArea id="t" height="124" width="336" x="297" y="242"/>
<mx:Form width="336" height="167" x="297" y="44" borderStyle="outset" borderColor="#9263BD" backgroundColor="#9192AC" backgroundAlpha="0.86">
<mx:FormItem label="用户名：" fontSize="12" >
<mx:TextInput id="n"/>
</mx:FormItem>
<mx:FormItem label="密码：" fontSize="12" >
<mx:TextInput id="p"/>
</mx:FormItem>
<mx:Button label="登录" click="logins()"/>
</mx:Form>
</mx:Application>
package servlet;
import gjs.Person;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
public class LoginServlet extends HttpServlet {
public LoginServlet() {
super();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/xml");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
String name=request.getParameter("name");
String psw=request.getParameter("psw");
if("gjs".equals(name)&&"520".equals(psw)){
Person p=new Person("王八蛋",22,false);
JSONObject jo=JSONObject.fromObject(p);
out.print(jo.toString());
System.out.println(jo.toString());
}else{
out.print("");
}
out.close();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
public void init() throws ServletException {
// Put your code here
}
}
跟前面没什么两样，只是用json转了一下，都是按json接口来的，所以使用起来平台差异都不大。
传xml方式：
Servlet：
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/xml");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
StringBuilder sb=new StringBuilder();
sb.append("<agents>");
sb.append("<agent id='100' name='大西瓜' age='21' sex='false'/>");
sb.append("<agent id='101' name='小西瓜' age='23' sex='true'/>");
sb.append("<agent id='102' name='烂西瓜' age='24' sex='false'/>");
sb.append("<agent id='103' name='无子西瓜' age='25' sex='true'/>");
sb.append("<agent id='104' name='打西瓜' age='27' sex='false'/>");
sb.append("</agents>");
out.write(sb.toString());
}
mxml：
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">
<mx:HTTPService id="h" resultFormat="object" url="http://localhost:8888/Flex/AgentServlet" result="getResult(event)" />
<mx:Panel label="Agent List">
<mx:DataGrid dataProvider="{l}" id="dg" width="100%" height="100%">
<mx:columns>
<mx:Array>
<mx:DataGridColumn headerText="id" dataField="id" />
<mx:DataGridColumn headerText="name" dataField="name" />
<mx:DataGridColumn headerText="age" dataField="age" />
<mx:DataGridColumn headerText="sex" dataField="sex" />
</mx:Array>
</mx:columns>
</mx:DataGrid>
</mx:Panel>
<mx:Script>
<![CDATA[
import mx.events.DataGridEvent;
import mx.events.ListEvent;
import mx.events.ItemClickEvent;
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
[Bindable]
private var l:ArrayCollection;
private var index:int;
private function getResult(e:ResultEvent):void{
l=e.result.agents.agent as ArrayCollection;
trace(e.result);
}
private function send():void{
h.send();
}
]]>
</mx:Script>
<mx:Button click="send()" label="Show Agents" x="420" y="324"/>
</mx:Application>
RemoteObject方式：
先要安装lcds，在remoting-config.xml中加这个
<destination id="agentJavaObj"> <properties> <source>gjs.Agent</source> <scope>application</scope> </properties> </destination>
Flex.mxml：
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">
<mx:RemoteObject id="r" destination="agentJavaObj" />
<mx:Panel label="Agent List">
<mx:DataGrid dataProvider="{l}" id="dg" width="100%" height="100%" itemClick="addSub(event)">
<mx:columns>
<mx:Array>
<mx:DataGridColumn headerText="id" dataField="id" />
<mx:DataGridColumn headerText="name" dataField="name" />
<mx:DataGridColumn headerText="age" dataField="age" />
<mx:DataGridColumn headerText="sex" dataField="sex" />
</mx:Array>
</mx:columns>
</mx:DataGrid>
</mx:Panel>
<mx:Script>
<![CDATA[
import mx.events.DataGridEvent;
import mx.events.ListEvent;
import mx.events.ItemClickEvent;
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
[Bindable]
private var l:ArrayCollection;
private var index:int;
private function callJava():void{
r.getAgent();
//服务成功返回后调用
r.addEventListener(ResultEvent.RESULT,showJavaObj);
}
private function addSub(e:ListEvent):void{
index=e.rowIndex;
r.addAgent(e.rowIndex);
r.addEventListener(ResultEvent.RESULT,addAgent);
//去除之前的事件监听showJavaObj否则还会调用
r.removeEventListener(ResultEvent.RESULT,showJavaObj);
}
private function addAgent(e:ResultEvent):void{
var o:Object=e.result as Object;
//加入子元素
l.addItemAt(o,index+1);
}
private function showJavaObj(event:ResultEvent):void{
l=event.result as ArrayCollection;
}
]]>
</mx:Script>
<mx:Button click="callJava()" label="Show Agents" x="420" y="324"/>
</mx:Application>
Agent.java：
package gjs;
import java.util.ArrayList;
import java.util.List;
public class Agent {
private long id;
private String name;
private int age;
private boolean sex;
//一定要有无参构造，因为写了有参构造没有默认的无参了
public Agent(){
}
public Agent(long id,String name,int age,boolean sex){
this.id=id;
this.name=name;
this.age=age;
this.sex=sex;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public boolean isSex() {
return sex;
}
public void setSex(boolean sex) {
this.sex = sex;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public List<Agent> getAgent(){
Agent a1=new Agent(100,"王八蛋",23,false);
Agent a2=new Agent(101,"王九蛋",22,true);
Agent a3=new Agent(102,"王十蛋",21,false);
Agent a4=new Agent(103,"王七蛋",20,true);
List<Agent> l=new ArrayList<Agent>();
l.add(a1);
l.add(a2);
l.add(a3);
l.add(a4);
return l;
}
public Agent addAgent(long id){
System.out.println(id);
Agent a1=new Agent(200,"朱重八",33,true);
return a1;
}
}
环境配置有点麻烦，可以参考“Flex + LCDS + Java 入门教程”这个文档。
完成