android与tomcat服务器交互实例

原URL:http://www.cnblogs.com/feifei1010/archive/2012/09/05/2671557.html

一、教程目的。

  本教程的目的在于教会怎么完成android与tomcat服务器的数据交互。
二、开发环境。
  Myeclipse8.5+jdk1.6+android2.3
三、开发步骤。
   (1)新建一个web项目，并添加struts2支持。
    new->webproject
   1在项目名称右键，Myeclipse->Add Struts Capabilities 

 struts specification 选择struts2.1
    然后选择完成

2新建一个action类

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package  action;   import  java.io.IOException;   import  javax.servlet.http.HttpServletRequest; import  javax.servlet.http.HttpServletResponse;   import  org.apache.struts2.ServletActionContext;   import  com.opensymphony.xwork2.ActionSupport;   public  class  AndroidAction extends  ActionSupport {          HttpServletRequest request=ServletActionContext.getRequest();          HttpServletResponse response = ServletActionContext.getResponse();          @Override          public  String execute() throws  Exception {                  // TODO Auto-generated method stub                  return  super .execute();          }          public  void  test()          {                  String str = request.getParameter( "test" );                  System.out.println(str);                  writeOut( "hello android" );          }          /**           * 返回值           * @param jsonStr           */          public  void  writeOut(String jsonStr) {                  response.setContentType( "html/txt" );                  response.setCharacterEncoding( "utf-8" );                  response.setHeader( "Pragma" , "no-cache" );                  response.setHeader( "Cache-Control" , "no-cache, must-revalidate" );                  response.setHeader( "Pragma" , "no-cache" );                  try  {                            response.getWriter().write(jsonStr);                          response.getWriter().flush();                          response.getWriter().close();                  } catch  (IOException e) {                          e.printStackTrace();                  }          } }

　　3.修改struts.xml

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<?xml version= "1.0"  encoding= "UTF-8"  ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"  "http://struts.apache.org/dtds/struts-2.1.dtd" > <struts> < package  name= "androidaction"  extends = "json-default"  namespace= "/androidaction" >    <action name= "test"  class = "action.AndroidAction"  method= "test" >             <result type= "json"  name= "success" >            <param name= "contentType" >text/html</param>       </result>       <result type= "json"  name= "error" >            <param name= "contentType" >text/html</param>       </result>    </action> </ package > </struts>

　　4.发布web项目   AndroidWebserver上右键 run as Myeclipse server application

(2)新建一个android项目。
记得要加入commons-httpclient-3.1.jar依赖包
新建一个链接工具类ConnUtil.java代码如下

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public  class  HelloApacheServerActivity extends  Activity {      /** Called when the activity is first created. */      @Override      public  void  onCreate(Bundle savedInstanceState) {          super .onCreate(savedInstanceState);          setContentView(R.layout.main);          final  ConnUtil cu = new  ConnUtil();          Button btn = (Button)findViewById(R.id.sendMessage);          btn.setOnClickListener( new  OnClickListener(){                            @Override                          public  void  onClick(View arg0) {                                  String s = cu.sayHello();                                  Toast.makeText(HelloApacheServerActivity. this ,s,Toast.LENGTH_SHORT).show();                          }                            });      } }

　　对了，android项目要记得添加网络访问权限
<uses-permission android:name="android.permission.INTERNET"/>

最后验证一下
按下"say hello"按钮 在myeclipse 的console下可以看到"hello server" 这是从android端发来的消息
同时android会弹出一个Toast "hello android"这是从服务器返回的消息。

最后 完整工程下载:

http://files.cnblogs.com/feifei1010/Desktop.zip