struts2服务端与android交互

本文主要包括以下内容

android与struts2服务器实现登陆
android从struts2服务器获取list数据
android上传数据到struts2服务器

服务器端代码

package com.easyway.json.android;import java.util.HashMap;
import java.util.Map;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;import com.opensymphony.xwork2.ActionSupport;/*** 在android中有时候我们不需要用到本机的SQLite数据库提供数据，更多的时候是从网络上获取数据，* 那么Android怎么从服务器端获取数据呢？有很多种，归纳起来有*一：基于Http协议获取数据方法。*二：基于SAOP协议获取数据方法，*那么我们的这篇文章主要是将关于使用Http协议获取服务器端数据，*这里我们采取的服务器端技术为java，框架为Struts2,或者可以有Servlet,又或者可直接从JSP页面中获取数据。*那么，接下来我们便开始这一路程：*首先：编写服务器端方法,我这里采用的MVC框架是Struts2，目的很单纯，就是为了以后做个完整的商业项目，*技术配备为：android+SSH。当然，篇幅有限，我这里就直接用Strtus2而已。*服务器端：新建WebProject ,选择Java ee 5.0.*为了给项目添加Struts2的支持，我们必须导入Struts2的一些类库，如下即可（有些jar包是不必的，但是我们后来扩展可能是要使用到的，就先弄进去）：*xwork-core-2.2.1.1.jar  struts2-core-2.2.1.1.jar commons-logging-1.0.4.jar  freemarker-2.3.16.jar*ognl-3.0.jar  javassist-3.7.ga.jar commons-ileupload.jar commons-io.jar json-lib-2.1-jdk15.jar  *处理JSON格式数据要使用到 struts2-json-plugin-2.2.1.1.jar   * 基于struts2的json插件.* * * 采用接口注入的方式注入HttpServletRequest,HttpServletResponse对象* * @author longgangbai**/
public class LoginAction extends ActionSupport implements ServletRequestAware,ServletResponseAware {/** * */private static final long serialVersionUID = 1L;HttpServletRequest request;HttpServletResponse response;private String userName;private String password;public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public void setServletRequest(HttpServletRequest request) {this.request = request;}public void setServletResponse(HttpServletResponse response) {this.response = response;}/*** 模拟用户登录的业务*/public void login() {try {//如果不采用接口注入的方式的获取HttpServletRequest，HttpServletResponse的方式// HttpServletRequest request =ServletActionContext.getRequest();// HttpServletResponse response=ServletActionContext.getResponse();this.response.setContentType("text/json;charset=utf-8");this.response.setCharacterEncoding("UTF-8");//JSONObject json=new JSONObject(); Map<String,String> json=new HashMap<String,String>();if ("admin".equals(userName)&&"123456".equals(password)) {json.put("message", "欢迎管理员登陆");} else if ((!"admin".equals(userName))&&"123456".equals(password)) {json.put("message", "欢迎"+userName+"登陆！");} else {json.put("message", "非法登陆信息！");}byte[] jsonBytes = json.toString().getBytes("utf-8");response.setContentLength(jsonBytes.length);response.getOutputStream().write(jsonBytes);response.getOutputStream().flush();response.getOutputStream().close();} catch (Exception e) {e.printStackTrace();}}
}

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<!-- setting encoding,DynamicMethod,language      
<constant name="struts.custom.i18n.resources" value="messageResource"></constant>    --><constant name="struts.i18n.encoding" value="UTF-8"/><constant name="struts.enable.DynamicMethodInvocation"  value="true"/><!-- add package here extends="struts-default"--><package name="default" extends="json-default"><!--需要将struts-default改为--><action name="login" class="com.easyway.json.android.LoginAction"method="login"><result type="json"/><!--返回值类型设置为json,不设置返回页面--></action></package>
</struts>

ajax测试页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Ajax调用web服务</title>
<script type="text/javascript">
var xmlHttpReq;    //用于保存XMLHttpRequest对象的全局变量//用于创建XMLHttpRequest对象
function createXmlHttp() {//根据window.XMLHttpRequest对象是否存在使用不同的创建方式
//    if (window.XMLHttpRequest) {
//       xmlHttp = new XMLHttpRequest();                  //FireFox、Opera等浏览器支持的创建方式
//   } else {
//      xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");//IE浏览器支持的创建方式
//    }if (window.ActiveXObject) {xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");} else if (window.XMLHttpRequest) {xmlHttpReq = new XMLHttpRequest();}
}function loadAjax() {createXmlHttp();                        //创建XmlHttpRequest对象var url="http://localhost:8080/AndroidStruts2JSON/login.action?userName=admin&password=123456&date="+new Date();//xmlHttpReq.open("get", encodeURI(encodeURI(url+param,"UTF-8"),"UTF-8"), true);xmlHttpReq.open("get", encodeURI(encodeURI(url,"UTF-8"),"UTF-8"), true);//上传图片xmlHttpReq.setrequestheader("content-type","application/x-www-form-urlencoded");//post提交设置项xmlHttpReq.onreadystatechange = loadCallback;  //IE这里设置回调函数xmlHttpReq.send(null);}function loadCallback() {//alert(xmlHttpReq.readyState);if (xmlHttpReq.readyState == 4) {alert("aa");//if(xmlHttpReq.status==200){document.getElementById("contentDiv").innerHTML=xmlHttpReq.responseText;//}}
}</script><body>
<div id="contentTypeDiv">
</div>
<br/><br/>
<div id="contentDiv">
</div><input type="button" value="调用" onclick="loadAjax()"></body>
</head>
</html>

手机代码

package com.easyway.android.json;import java.io.IOException;import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
/*** 在现在开发的项目中采用Android+REST WebService服务方式开发的手机平台很少采用*  soap协议这种方式，主要soap协议解析问题，增加了代码量。*  *  * 在android中有时候我们不需要用到本机的SQLite数据库提供数据，更多的时候是从网络上获取数据，* 那么Android怎么从服务器端获取数据呢？有很多种，归纳起来有*  一：基于Http协议获取数据方法。*  二：基于SAOP协议获取数据方法**备注：在网络有关的问题最好添加以下两项：*   1.线程和虚拟机策略*   ///在Android2.2以后必须添加以下代码
*           //本应用采用的Android4.0
*           //设置线程的策略
*            StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()   
*            .detectDiskReads()   
*            .detectDiskWrites()   
*            .detectNetwork()   // or .detectAll() for all detectable problems   
*            .penaltyLog()   
*            .build());   
*           //设置虚拟机的策略
*         StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()   
*                    .detectLeakedSqlLiteObjects()   
*                    //.detectLeakedClosableObjects()   
*                    .penaltyLog()   
*                    .penaltyDeath()   
*                    .build());
*      2.可以访问网络的权限：
*       即AndroidManifest.xml中配置：
*        <uses-permission android:name="android.permission.INTERNET"/>** * @author longgangbai* **/
public class AndroidHttpJSONActivity extends Activity {private static  String processURL="http://192.168.1.130:8080/AndroidStruts2JSON/login.action?";private EditText txUserName;private EditText txPassword;private Button btnLogin;/***  Called when the activity is first created.*/@Overridepublic void onCreate(Bundle savedInstanceState) {///在Android2.2以后必须添加以下代码//本应用采用的Android4.0//设置线程的策略StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()   .detectDiskReads()   .detectDiskWrites()   .detectNetwork()   // or .detectAll() for all detectable problems   .penaltyLog()   .build());   //设置虚拟机的策略StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()   .detectLeakedSqlLiteObjects()   //.detectLeakedClosableObjects()   .penaltyLog()   .penaltyDeath()   .build());super.onCreate(savedInstanceState);//设置页面布局setContentView(R.layout.main);//设置初始化视图initView();//设置事件监听器方法setListener();}/*** 创建初始化视图的方法*/private void initView() {btnLogin=(Button)findViewById(R.id.btnLogin);txPassword=(EditText)findViewById(R.id.txtPassword);txUserName=(EditText)findViewById(R.id.txtUserName);}/*** 设置事件的监听器的方法*/private void setListener() {btnLogin.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {String userName=txUserName.getText().toString();String password=txPassword.getText().toString();loginRemoteService(userName,password);}});}/*** 获取Struts2 Http 登录的请求信息* @param  userName* @param  password*/public void loginRemoteService(String userName,String password){String result=null;try {//创建一个HttpClient对象HttpClient httpclient = new DefaultHttpClient();//远程登录URLprocessURL=processURL+"userName="+userName+"&password="+password;Log.d("远程URL", processURL);//创建HttpGet对象HttpGet request=new HttpGet(processURL);//请求信息类型MIME每种响应类型的输出（普通文本、html 和 XML，json）。允许的响应类型应当匹配资源类中生成的 MIME 类型//资源类生成的 MIME 类型应当匹配一种可接受的 MIME 类型。如果生成的 MIME 类型和可接受的 MIME 类型不 匹配，那么将//生成 com.sun.jersey.api.client.UniformInterfaceException。例如，将可接受的 MIME 类型设置为 text/xml，而将//生成的 MIME 类型设置为 application/xml。将生成 UniformInterfaceException。request.addHeader("Accept","text/json");//获取响应的结果HttpResponse response =httpclient.execute(request);//获取HttpEntityHttpEntity entity=response.getEntity();//获取响应的结果信息String json =EntityUtils.toString(entity,"UTF-8");//JSON的解析过程if(json!=null){JSONObject jsonObject=new JSONObject(json);result=jsonObject.get("message").toString();}if(result==null){json="登录失败请重新登录";}//创建提示框提醒是否登录成功AlertDialog.Builder builder=new Builder(AndroidHttpJSONActivity.this);builder.setTitle("提示").setMessage(result).setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}}).create().show();} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}
}

参考链接

Android+struts2+JSON方式的手机开发 - topMan’blog - ITeye技术网站

效果如下

struts

android从struts2服务器获取list数据

参考链接

android–使用Struts2服务端与android交互 - android开发实例 - 博客园

效果如下

android从struts2服务器获取list数据

android上传数据到struts2服务器

android端代码

package com.zj.wifitest;import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;import org.json.JSONObject;import android.app.Activity;
import android.os.Bundle;
import android.os.Message;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}public void click(View view){run();}public void run() {new Thread() {@Overridepublic void run() {try {HttpURLConnection conn = null;String content = "";try {// 为了测试取消连接// Thread.sleep(5000);// http联网可以用httpClient或java.net.url// URL url = new URL(////// "http://115.28.34.52:8080/Car_Experiment/carInsert_insert_info.action");// carInsert_insert_info.action"URL url = new URL("http://120.27.126.68:8080/CarServer/transAction");conn = (HttpURLConnection) url.openConnection();conn.setDoInput(true);conn.setDoOutput(true);conn.setConnectTimeout(1000 * 30);conn.setReadTimeout(1000 * 30);conn.setRequestMethod("GET");conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");OutputStream output = conn.getOutputStream();JSONObject jsonObject = new JSONObject();jsonObject.put("0C", "0A0B");jsonObject.put("0D", "0B");jsonObject.put("10", "0A0B");jsonObject.put("11", "0B");//jsonObject.put("13", "0B");
//                          jsonObject.put("14", "0A0B");
//                          jsonObject.put("15", "0A0B");
//                          jsonObject.put("16", "0A0B");
//                          jsonObject.put("17", "0A0B");
//                          jsonObject.put("18", "0A0B");
//                          jsonObject.put("19", "0A0B");
//                          jsonObject.put("1A", "0A0B");
//                          jsonObject.put("1B", "0A0B");jsonObject.put("2F", "0A0B");jsonObject.put("02", "0A0B");System.out.println(jsonObject.toString());output.write(jsonObject.toString().getBytes());output.flush();output.close();int responseCode = conn.getResponseCode();Log.i("test", "responseCode"+responseCode);InputStream in = conn.getInputStream();System.out.println("responseCode=" + responseCode);if (responseCode == HttpURLConnection.HTTP_OK) {System.out.println("responseCode=" + HttpURLConnection.HTTP_OK);Log.i("test", "successed");// InputStreamReader reader = new// InputStreamReader(in,charSet);BufferedReader reader = new BufferedReader(new InputStreamReader(in, "UTF-8"));String line = null;while ((line = reader.readLine()) != null) {content += line;}System.out.println("result:" + content);}in.close();} catch (Exception e) {e.printStackTrace();} finally {conn.disconnect();conn = null;}} catch (Exception e) {e.printStackTrace();}}}.start();}
}

服务器端代码

package whu.zhengrenjie.Action;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;import net.sf.json.JSONObject;import org.apache.struts2.ServletActionContext;import whu.zhengrenjie.Model.SimpleService;
import whu.zhengrenjie.Util.Util;import com.opensymphony.xwork2.ActionSupport;public class TransDataAction extends ActionSupport {private SimpleService simpleService;private BufferedReader reader;public SimpleService getSimpleService() {return simpleService;}public void setSimpleService(SimpleService simpleService) {this.simpleService = simpleService;}@Overridepublic String execute() throws Exception {// TODO Auto-generated method stubif (Util.TEST) {String test;JSONObject jsonObject = new JSONObject();jsonObject.put("0C", "0000");jsonObject.put("0D", "00");jsonObject.put("10", "0000");jsonObject.put("11", "00");jsonObject.put("2F", "00");jsonObject.put("02", "12345678");test = jsonObject.toString();System.out.println("----------------------" + test);simpleService.insert(test);} else {try {String request = "";String temp = "";System.out.println("herrrrrrrrrrrrre");reader = new BufferedReader(new InputStreamReader(ServletActionContext.getRequest().getInputStream(),"UTF-8"));while ((temp = reader.readLine()) != null) {request += temp;}simpleService.insert(request);} catch (IOException e) {// TODO Auto-generated catch blockce.printStackTrace();} finally {reader.close();}}return super.execute();}
}

SimpleService

package whu.zhengrenjie.Model;import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;import net.sf.json.JSONObject;
import whu.zhengrenjie.DAO.SimpleDAO;
import whu.zhengrenjie.PO.RunTimePO;
import whu.zhengrenjie.Util.Util;public class SimpleService {private int count = 0;private SimpleDAO simpleDAO;private RunTimePO runTimePO;private JSONObject jsonObject;public SimpleDAO getSimpleDAO() {return simpleDAO;}public void setSimpleDAO(SimpleDAO simpleDAO) {this.simpleDAO = simpleDAO;}public RunTimePO getRunTimePO() {return runTimePO;}public void setRunTimePO(RunTimePO runTimePO) {this.runTimePO = runTimePO;}public void insert(String requestStr) {jsonObject = JSONObject.fromObject(requestStr);String rpmStr = (String) jsonObject.get("0C");if (!rpmStr.contains("0000")) {double rpm = Integer.parseInt(rpmStr, 16) / 4;  runTimePO.setRpm(rpm);if (Util.DEBUG) {System.out.println(count++);}} else {runTimePO.setRpm(0);}String speedStr = (String) jsonObject.get("0D");if (!speedStr.contains("00")) {double speed = Integer.parseInt(speedStr, 16);runTimePO.setSpeed(speed);if (Util.DEBUG) {System.out.println(count++);}} else {runTimePO.setSpeed(0);}String airSpeedStr = (String) jsonObject.get("10");if (!airSpeedStr.contains("0000")) {double airSpeed = Integer.parseInt(airSpeedStr, 16) / 100;runTimePO.setAirSpeed(airSpeed);if (Util.DEBUG) {System.out.println(count++);}} else {runTimePO.setAirSpeed(0);}String throttleStr = (String) jsonObject.get("11");if (!throttleStr.contains("00")) {double throttle_1 = Integer.parseInt(throttleStr, 16) * 100 / 255;runTimePO.setThrottle(throttle_1);if (Util.DEBUG) {System.out.println(count++);}} else {runTimePO.setThrottle(0);}String VIN=(String) jsonObject.get("02");runTimePO.setSIN(VIN);String oilLevelStr = (String) jsonObject.get("2F");if (!oilLevelStr.contains("00")) {double oilLevel = Integer.parseInt(oilLevelStr, 16) * 100 / 255;runTimePO.setOilLevel(oilLevel);if (Util.DEBUG) {System.out.println(count++);}} else {runTimePO.setOilLevel(0);}try {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");Date date = new Date();String time = sdf.format(date);date = sdf.parse(time);runTimePO.setDate(date);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}simpleDAO.insert();}
}