Android（五）数据存储之五网络数据交互 1
昨天我们只对Android接收网络数据进行了简单介绍，今天我们完成了Android数据存储网络部分的所有内容。在此我将对这非常重要的内容进行总结。
?
?????? 本篇日志是对Android与WEB应用服务之间进行数据交互的总结，下篇日志是一个经典而又让人十分好奇的Android多线程断点下载应用的总结。下面我们开始Android与网络数据的交互。
?
一、创建WEB应用服务
?????? 使用eclipse3.5创建一个动态WEB应用，使用Struts1处理用户请求。我们此应用添加一个DispatchAction，并为它添加四个方法创建用于处理Android以各种方式提交的请求。
?
?????? 1.创建动态WEB工程
?????? Project name:AndroidWebServer
?????? Target runtime:Apache Tomcat v6.0
?????? Dynamic web module version:2.5
?????? Configuration:Default Configuration for Apache Tomcat v6.0
?
?????? 2.添加DispatchAction
package com.changcheng.web.struts.actions;
?
import java.io.File;
import java.io.FileOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.changcheng.web.struts.forms.DataForm;
?
public class AndroidWebServer extends DispatchAction {
?
???????? // Andoird以Get方式发送的请求
???????? public ActionForward sendDataByGet(ActionMapping mapping, ActionForm form,
??????????????????????????? HttpServletRequest request, HttpServletResponse response)
??????????????????????????? throws Exception {
?????????????????? String name = request.getParameter("name");
?????????????????? request.setAttribute("message", "Hello " + name);
?????????????????? return mapping.findForward("success");
???????? }
?
???????? // Andoird以Post方式发送的请求
???????? public ActionForward sendDataByPost(ActionMapping mapping, ActionForm form,
??????????????????????????? HttpServletRequest request, HttpServletResponse response)
??????????????????????????? throws Exception {
?????????????????? String name = request.getParameter("name");
?????????????????? request.setAttribute("message", "Hello " + name);
?????????????????? return mapping.findForward("success");
???????? }
??????????????????
???????? // Andoird以表单方式发送的请求
???????? public ActionForward sendDataByForm(ActionMapping mapping, ActionForm form,
??????????????????????????? HttpServletRequest request, HttpServletResponse response)
??????????????????????????? throws Exception {
?????????????????? DataForm formbean = (DataForm) form;
?????????????????? System.out.println("StrData:" + formbean.getStrData());
?????????????????? // 获取上传的文件
?????????????????? if (formbean.getFileData() != null
???????????????????????????????????? && formbean.getFileData().getFileSize() > 0) {
??????????????????????????? // 设置保存目录
??????????????????????????? File dir = new File(request.getSession().getServletContext()
?????????????????????????????????????????????? .getRealPath("/images"));
??????????????????????????? if (!dir.exists())
???????????????????????????????????? dir.mkdirs();
??????????????????????????? // 保存文件
??????????????????????????? FileOutputStream outStream = new FileOutputStream(new File(dir,
?????????????????????????????????????????????? formbean.getFileData().getFileName()));
??????????????????????????? outStream.write(formbean.getFileData().getFileData());// 保存文件
??????????????????????????? outStream.close();
?????????????????? }
?????????????????? return null;
???????? }
}
?
?????? 3.向web.xml添加Struts1的ActionServlet
<servlet>
???????? <servlet-name>struts</servlet-name>
???????? <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
???????? <init-param>
?????????????????? <param-name>config</param-name>
?????????????????? <param-value>/WEB-INF/struts-config.xml</param-value>
???????? </init-param>
</servlet>
<servlet-mapping>
???????? <servlet-name>struts</servlet-name>
???????? <url-pattern>*.do</url-pattern>
</servlet-mapping>
?
?????? 4.struts-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC
????????? "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
????????? "http://struts.apache.org/dtds/struts-config_1_3.dtd">
?
<struts-config>
???????? <form-beans>
?????????????????? <form-bean name="dataForm" type="com.changcheng.web.struts.forms.DataForm" />
???????? </form-beans>
???????? <action-mappings>
?????????????????? <action path="/server"
??????????????????????????? type="com.changcheng.web.struts.actions.AndroidWebServer" name="dataForm"
??????????????????????????? scope="request" parameter="method">
??????????????????????????? <forward name="success" path="/WEB-INF/pages/success.jsp"/>
?????????????????? </action>
???????? </action-mappings>
</struts-config>
?
?
二、创建Android应用
?????? 1.创建Android工程
?????? Project name:AndroidWebClient
?????? BuildTarget:Android2.1
?????? Application name:AndroidWEB应用客户端
?????? Package name:com.changcheng.web.client
?????? Create Activity:AndroidWebClient
?????? Min SDK Version:7
?
?????? 2.AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
?????? package="com.changcheng.web.client" android:versionCode="1"
?????? android:versionName="1.0">
?????? <application android:icon="@drawable/icon" android:label="@string/app_name">
????????????? <!-- 单元测试 -->
????????????? <uses-library android:name="android.test.runner" />
????????????? <activity android:name=".AndroidWebClient" android:label="@string/app_name">
???????????????????? <intent-filter>
??????????????????????????? <action android:name="android.intent.action.MAIN" />
??????????????????????????? <category android:name="android.intent.category.LAUNCHER" />
???????????????????? </intent-filter>
????????????? </activity>
?
?????? </application>
?????? <uses-sdk android:minSdkVersion="7" />
?????? <!-- 访问internet权限 -->
?????? <uses-permission android:name="android.permission.INTERNET" />
?????? <!-- 在SDCard中创建与删除文件权限 -->
?????? <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
?????? <!-- 往SDCard写入数据权限 -->
?????? <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
?????? <!-- 单元测试 -->
?????? <instrumentation android:name="android.test.InstrumentationTestRunner"
????????????? android:targetPackage="com.changcheng.web.client" android:label="Tests for My App" />
</manifest>
?????? Android应用要访问Internet需要添加权限。
