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..
         */
    }
}  

最后：

运行SendData.java文件,可看到控制台输出,根据前面的设定我们知道，客户端和服务端已经建立连接，并且数据成功发送给了服务端

参考链接：

关于servlet服务端接收客户端发送的List