安卓向服务器发送List数据

谁践踏了优雅 2022-07-27 11:52 171阅读 0赞

### 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][JDK_URLConnection_ - wlzf6296149_ - _ - 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][servlet_List]

[JDK_URLConnection_ - wlzf6296149_ - _ - CSDN.NET]: http://blog.csdn.net/wlzf6296149/article/details/7998641
[servlet_List]: http://blog.csdn.net/wlzf6296149/article/details/8001433