第一步：

首先寫一個自定義的JavaBean，以UserInfo.java為例，需要實現對象序列化的接口，因為之后輸出流對象需要實現輸出可序列化的對象。不這樣的話，后續時發送時會報異常

package xl.java.bean; import java.io.Serializable; /** * 用戶信息 * @author xl 2012-9-20 */ public class UserInfo implements Serializable { private static final long serialVersionUID = 1L; /** * 用戶名 */ private String UserName; /** * 密碼 */ private String Password; /** * 昵稱 */ private String NickName; /** * QQ號 */ private int QQNumber; /** * 電話號 */ private String TelNumber; /** * 年齡 */ 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，服務器與客戶端的javabean包名必須一致，不然的話會報ClassNotFoundException異常。

第二步：

編寫客戶端模擬發送數據的類SendData.java。中間一大段的連接處理，具體解釋可參考：
JDK中的URLConnection參數詳解 - wlzf6296149的專欄 - 博客頻道 - 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; /** * 模擬發送數據 * @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(); } } /** * 上傳處理結果 * * @throws IOException * */ private void sendDataToServer() throws IOException { //用于servlet判別請求，執行相應方法 String QuestId = "SubmitUserInfoList"; //模擬發送自定義類型的List數據 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"); //不設置這個默認為Get,服務器會沒反應，不知道什么情況， //糾結了很久，改成Post的話,servlet里的 //doPost方法就有反應了 httpUrlConnection.setRequestMethod("POST"); httpUrlConnection.connect(); OutputStream outStrm = httpUrlConnection.getOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(outStrm); //輸出流第一段數據是QuestId的值 oos.writeObject(QuestId); //第二段數據是List數據 oos.writeObject(listdata); oos.flush(); oos.close(); InputStream inStrm = httpUrlConnection.getInputStream(); System.out.println("數據發送成功!"); } catch (Exception e) { e.printStackTrace(); } } }

編寫servlet，接收數據

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";// 客戶端提交到用戶信息 protected void doPost(HttpServletRequest request, HttpServletResponse response) { System.out.println("________---------doPost--------_____________"); try { // 鏈接數據庫 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); // 如果不是通過URL的Get形式上傳數據時，調用此方法，獲取上傳的list數據 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(); } } /** * 獲取輸入流中的數據 * * @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) { // 獲取數據，插入數據庫 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"); } /** * 插入數據庫代碼可以寫在這.. */ } }

最后：

運行SendData.java文件,可看到控制臺輸出,根據前面的設定我們知道，客戶端和服務端已經建立連接，并且數據成功發送給了服務端

參考鏈接：

關于servlet服務端接收客戶端發送的List

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