安卓向服务器发送List数据

第一步：

首先写一个自定义的JavaBean，以UserInfo.java为例，需要实现对象序列化的接口，因为之后输出流对象需要实现输出可序列化的对象。不这样的话，后续时发送时会报异常

package xl.java.bean;  import java.io.Serializable;  /** * 用户信息 * @author xl 2012-9-20 */  
public class UserInfo implements Serializable  
{  private static final long serialVersionUID = 1L;  /** * 用户名 */  private String UserName;  /** * 密码 */  private String Password;  /** * 昵称 */  private String NickName;  /** * QQ号 */  private int QQNumber;  /** * 电话号 */  private String TelNumber;  /** * 年龄 */  private int Age;  public String getUserName()  {  return UserName;  }  public void setUserName(String userName)  {  UserName = userName;  }  public String getPassword()  {  return Password;  }  public void setPassword(String password)  {  Password = password;  }  public String getNickName()  {  return NickName;  }  public void setNickName(String nickName)  {  NickName = nickName;  }  public int getQQNumber()  {  return QQNumber;  }  public void setQQNumber(int qQNumber)  {  QQNumber = qQNumber;  }  public String getTelNumber()  {  return TelNumber;  }  public void setTelNumber(String telNumber)  {  TelNumber = telNumber;  }  public int getAge()  {  return Age;  }  public void setAge(int age)  {  Age = age;  }  
}

注意，服务器与客户端的javabean包名必须一致，不然的话会报ClassNotFoundException异常。

第二步：

编写客户端模拟发送数据的类SendData.java。中间一大段的连接处理，具体解释可参考：
JDK中的URLConnection参数详解 - wlzf6296149的专栏 - 博客频道 - CSDN.NET

package xl.java.send;  import java.io.IOException;  
import java.io.InputStream;  
import java.io.ObjectOutputStream;  
import java.io.OutputStream;  
import java.net.HttpURLConnection;  
import java.net.URL;  
import java.net.URLConnection;  
import java.util.ArrayList;  
import java.util.List;  import xl.java.bean.UserInfo;  /** * 模拟发送数据 * @author xl 2012-9-20 *  */  
public class SendData  
{  private static final String BASIC_URL_QUEST =  "http://192.168.1.1:8080/test/TestServlet";  public static void main(String[] args)  {  SendData senddata=new SendData();  try  {  senddata.sendDataToServer();  }  catch (IOException e)  {  e.printStackTrace();  }  }  /** * 上传处理结果 *  * @throws IOException *  */  private void sendDataToServer() throws IOException  {  //用于servlet判别请求，执行相应方法  String QuestId = "SubmitUserInfoList";  //模拟发送自定义类型的List数据  List<UserInfo> listdata = new ArrayList<UserInfo>();  for (int i = 0; i < 10; i++)  {  UserInfo li = new UserInfo();  li.setUserName("XL" + i);  li.setPassword("00000" + i);  li.setQQNumber(1234567 + i);  li.setTelNumber("15012344321" + i);  li.setNickName("xiaolang" + i);  li.setAge(18 + i);  listdata.add(li);  }  URL url = new URL(BASIC_URL_QUEST);  try  {  URLConnection con = url.openConnection();  HttpURLConnection httpUrlConnection = (HttpURLConnection) con;  httpUrlConnection.setUseCaches(false);  httpUrlConnection.setDoOutput(true);  httpUrlConnection.setDoInput(true);  httpUrlConnection.setRequestProperty("Content-type",  "application/x-java-serialized-object");  //不设置这个默认为Get,服务器会没反应，不知道什么情况，  //纠结了很久，改成Post的话,servlet里的  //doPost方法就有反应了  httpUrlConnection.setRequestMethod("POST");  httpUrlConnection.connect();  OutputStream outStrm = httpUrlConnection.getOutputStream();  ObjectOutputStream oos = new ObjectOutputStream(outStrm);  //输出流第一段数据是QuestId的值  oos.writeObject(QuestId);  //第二段数据是List数据  oos.writeObject(listdata);      oos.flush();  oos.close();  InputStream inStrm = httpUrlConnection.getInputStream();  System.out.println("数据发送成功!");  }  catch (Exception e)  {  e.printStackTrace();  }  }  
}

编写servlet，接收数据

import java.io.IOException;  
import java.io.InputStream;  
import java.io.ObjectInputStream;  
import java.sql.Connection;  
import java.sql.DriverManager;  
import java.sql.ResultSet;  
import java.sql.SQLException;  
import java.sql.Statement;  
import java.util.List;  import javax.servlet.http.HttpServlet;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  import xl.java.bean.UserInfo;  /** * @author xl 2012-9-20 *  */  
public class TestServlet extends HttpServlet  
{  private static final long serialVersionUID = 1L;  private Connection mConnection = null;  private Statement mStatement = null;  private String QuestId = "";  private static final String SUBMIT_USERINFO_LIST = "SubmitUserInfoList";// 客户端提交到用户信息  protected void doPost(HttpServletRequest request,  HttpServletResponse response)  {  System.out.println("________---------doPost--------_____________");  try  {  // 链接数据库  Class.forName("org.gjt.mm.<a href="http://lib.csdn.net/base/14" class="replace_word" title="undefined" target="_blank" style="color: rgb(223, 52, 52); font-weight: bold;">mysql</a>.Driver").newInstance();  mConnection =  DriverManager  .getConnection("jdbc:mysql://localhost/test?user=root&password=123&useUnicode=true&characterEncoding=UTF-8");  mStatement =  mConnection.createStatement(  ResultSet.TYPE_SCROLL_INSENSITIVE,  ResultSet.CONCUR_READ_ONLY);  // 如果不是通过URL的Get形式上传数据时，调用此方法，获取上传的list数据  getListDataByObjectInputStream(request, response);  }  catch (SQLException e)  {  e.printStackTrace();  }  catch (InstantiationException e)  {  e.printStackTrace();  }  catch (IllegalAccessException e)  {  e.printStackTrace();  }  catch (ClassNotFoundException e)  {  e.printStackTrace();  }  catch (IOException e)  {  e.printStackTrace();  }  }  /** * 获取输入流中的数据 *  * @param request * @param response * @throws IOException * @throws ClassNotFoundException */  private void getListDataByObjectInputStream(HttpServletRequest request,  HttpServletResponse response) throws IOException,  ClassNotFoundException  {  System.out.println("---------getListDataByObjectInputStream--------");  response.setContentType("text/html");  InputStream inStream = request.getInputStream();  ObjectInputStream objInStream = new ObjectInputStream(inStream);  QuestId = (String) objInStream.readObject();  @SuppressWarnings("unchecked")  List<UserInfo> inList = (List<UserInfo>) objInStream.readObject();  if (QuestId.equals(SUBMIT_USERINFO_LIST))  {  System.out.println("QuestId.equals(SUBMIT_ORDER_LIST)");  submitOrderList(request, response, inList);  }  objInStream.close();  System.out.println("objInStream.close()");  }  /** * @param request * @param response * @param inList */  private void submitOrderList(HttpServletRequest request,  HttpServletResponse response, List<UserInfo> inList)  {  // 获取数据，插入数据库  for (UserInfo item : inList)  {  System.out.println("UserName=" + item.getUserName());  System.out.println("Password=" + item.getPassword());  System.out.println("NickName=" + item.getNickName());  System.out.println("QQNumber=" + item.getQQNumber());  System.out.println("TelNumber=" + item.getTelNumber());  System.out.println("Age=" + item.getAge() + "\n");  }  /** * 插入数据库代码可以写在这.. */  }  
}