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.
*/
@Override
public 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() {
@Override
public 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URL
processURL=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HttpEntity
HttpEntity 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() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).create().show();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.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
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 {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void click(View view)
{
run();
}
public void run() {
new Thread() {
@Override
public 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;
}
@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
if (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 blockc
e.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 block
e.printStackTrace();
}
simpleDAO.insert();
}
}
