使用Struts2服务端与android交互

转自：http://www.cnblogs.com/android-html5/archive/2011/09/25/2534107.html

android--使用Struts2服务端与android交互

一，服务器端：

首先搭建struts2的环境，导入必要的类库。

web.xml文件：

<?xmlversion="1.0"encoding="UTF-8"?>
<web-appversion="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

struts.xml文件：

<?xmlversion="1.0"encoding="GBK"?>
<!DOCTYPEstrutsPUBLIC
"-//ApacheSoftwareFoundation//DTDStrutsConfiguration2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<packagename="testjson"<spanstyle="color:#ff0000;">extends="json-default"</span>>
<actionname="getjson"class="com.shao.action.JSONAction"method="json">
<resulttype="json"></result>
</action>
</package>
</struts>

Action类：

packagecom.shao.action;
importjava.io.IOException;
importjava.util.ArrayList;
importjava.util.List;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importorg.apache.struts2.interceptor.ServletRequestAware;
importorg.apache.struts2.interceptor.ServletResponseAware;
importcom.google.gson.Gson;
importcom.opensymphony.xwork2.ActionSupport;
importcom.shao.domain.Music;
publicclassJSONActionextendsActionSupportimplementsServletRequestAware,
ServletResponseAware{
/**
*
*/
privatestaticfinallongserialVersionUID=-3604892179657815531L;
privateHttpServletRequestrequest;
privateHttpServletResponseresponse;
privateStringformat;
publicStringgetFormat(){
returnformat;
}
publicvoidsetFormat(Stringformat){
this.format=format;
}
@Override
publicvoidsetServletRequest(HttpServletRequestrequest){
//TODOAuto-generatedmethodstub
this.request=request;
}
@Override
publicvoidsetServletResponse(HttpServletResponseresponse){
//TODOAuto-generatedmethodstub
this.response=response;
}
publicvoidjson(){
List<Music>list=newArrayList<Music>();
//JsonArrayjsonArray=newJsonArray();
//JsonObjectjsonObject=newJsonObject();
Gsongson=newGson();
Musicm1=newMusic();
m1.setId(1);
m1.setAuthor("游鸿明");
m1.setName("白色恋人");
m1.setTime("04:01");
list.add(m1);
Musicm2=newMusic();
m2.setId(2);
m2.setAuthor("陈奕迅");
m2.setName("淘汰");
m2.setTime("04:44");
list.add(m2);
Musicm3=newMusic();
m3.setId(3);
m3.setAuthor("谢霆锋");
m3.setName("黄种人");
m3.setTime("04:24");
list.add(m3);
java.lang.reflect.Typetype=newcom.google.gson.reflect.TypeToken<List<Music>>(){
}.getType();
StringbeanListToJson=gson.toJson(list,type);
System.out.println("GSON-->"+beanListToJson);
try{
response.setCharacterEncoding("GBK");
//response.setContentType("text/xml;charset=utf-8");
this.response.getWriter().write(beanListToJson);
}catch(IOExceptione){
e.printStackTrace();
}
}
}

这个Music实体类，android客户端也用到。

packagecom.shao.domain;
publicclassMusic{
privateIntegerid;
privateStringname;
privateStringtime;
privateStringauthor;
publicIntegergetId(){
returnid;
}
publicvoidsetId(Integerid){
this.id=id;
}
publicStringgetName(){
returnname;
}
publicvoidsetName(Stringname){
this.name=name;
}
publicStringgetTime(){
returntime;
}
publicvoidsetTime(Stringtime){
this.time=time;
}
publicStringgetAuthor(){
returnauthor;
}
publicvoidsetAuthor(Stringauthor){
this.author=author;
}
}

访问 http://localhost:8080/Client/getjson.action;结果：

二，android客户端：

Activity类：

packagecom.shao.main;
importjava.util.ArrayList;
importjava.util.HashMap;
importjava.util.List;
importjava.util.Map;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
importandroid.widget.ListView;
importandroid.widget.SimpleAdapter;
publicclassJsonClientActivityextendsActivity{
/**Calledwhentheactivityisfirstcreated.*/
privateButtonupdate;
privateListViewlistView;
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
update=(Button)findViewById(R.id.update);
listView=(ListView)findViewById(R.id.list);
update.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
//TODOAuto-generatedmethodstub
StringurlStr="http://10.0.2.2:8080/Client/getjson.action";
Stringresult=GsonUtil.getJson(urlStr);
List<Music>list=GsonUtil.getListFromJson(result);
List<Map<String,Object>>data=getAdapterData(list);
SimpleAdapteradapter=newSimpleAdapter(JsonClientActivity.this,data,R.layout.list,newString[]{"name","author","time"},newint[]{R.id.name,R.id.author,R.id.time});
listView.setAdapter(adapter);
//listView.
}
});
}
privateList<Map<String,Object>>getAdapterData(Listlist){
List<Map<String,Object>>data=newArrayList<Map<String,Object>>();
for(inti=0;i<list.size();i++){
Map<String,Object>map=newHashMap<String,Object>();
Musicmusic=(Music)list.get(i);
map.put("name",music.getName());
map.put("author",music.getAuthor());
map.put("time",music.getTime());
data.add(map);
}
returndata;
}
}

packagecom.shao.main;
importjava.net.URI;
importjava.util.List;
importorg.apache.http.HttpEntity;
importorg.apache.http.HttpResponse;
importorg.apache.http.client.HttpClient;
importorg.apache.http.client.methods.HttpPost;
importorg.apache.http.impl.client.DefaultHttpClient;
importorg.apache.http.util.EntityUtils;
importcom.google.gson.Gson;
publicclassGsonUtil{
publicstaticStringgetJson(Stringurl){
HttpClientclient=newDefaultHttpClient();
HttpPostrequest;
try{
request=newHttpPost(newURI(url));
HttpResponseresponse=client.execute(request);
//判断请求是否成功
if(response.getStatusLine().getStatusCode()==200){//200表示请求成功
HttpEntityentity=response.getEntity();
if(entity!=null){
StringbeanListToJson=EntityUtils.toString(entity,"GBK");
returnbeanListToJson;
}
}
}catch(Exceptione){
//TODO:handleexception
}
returnnull;
}
publicstaticList<Music>getListFromJson(Stringjson){
java.lang.reflect.Typetype=newcom.google.gson.reflect.TypeToken<List<Music>>(){
}.getType();
Gsongson=newGson();
List<Music>list=gson.fromJson(json,type);
returnlist;
}
}

list.xml

<?xmlversion="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="name"
/>
<TextView
android:id="@+id/author"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/name"
android:paddingTop="5px"
android:text="author"
>
</TextView>
<TextView
android:id="@+id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/name"
android:layout_alignTop="@id/author"
android:layout_alignParentRight="true"
android:text="time">
</TextView>
</RelativeLayout>

运行结果：

主要的交互都是通过goolge的Gson完成

android--使用Struts2服务端与android交互

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