通過Http協議傳遞對象

1.client
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.URL;
import java.net.URLConnection;

public class ClientDemo  implements Serializable{

    private static final long serialVersionUID = 6923605292331605950L;

    /**
     * @param args
     */
    public static void main(String[] args) {
        try{

            // 1.通過在 URL 上調用 openConnection 方法建立連線物件。
            // 2.操作設定參數和一般請求屬性。
            // 3.使用 connect 方法建立到遠程對象的實際串連。
            // 4.遠程對象變為可用。遠程對象的頭欄位和內容變為可訪問。
 
            URL u = new URL("http://localhost:8080/ExamCenter/SynchronizeManager");
            URLConnection con = u.openConnection();
            con.setDoOutput(true);
            con.setDoInput(true);
            con.connect();
            
            // Send Data
            ObjectOutputStream objectOutputStream = new ObjectOutputStream(new BufferedOutputStream(con.getOutputStream()));
            objectOutputStream.writeObject(new ClientDemo());
            objectOutputStream.flush();
            objectOutputStream.close();
                    
            // Recieve Data
            ObjectInputStream objectInputStream = new ObjectInputStream( new BufferedInputStream(con.getInputStream()));
            Object obj = objectInputStream.readObject();
            System.out.println(obj);
            objectInputStream.close();
            
            }catch(Exception exp){
                exp.printStackTrace();
            }
    }

    public void printDemo() {
        System.out.println("對象 ClientDemo 傳輸成功！");

    }

}

2、server
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SynchronizeManager extends HttpServlet ...{

    private static final long serialVersionUID = -7477965020946583132L;

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException ...{
        boolean isIE = false;
        try ...{
            // 輸入
            try ...{
                InputStream inputStream = request.getInputStream();
                ObjectInputStream objectInputStream = new ObjectInputStream(new BufferedInputStream(inputStream));
                Object obj = objectInputStream.readObject();
                objectInputStream.close();
                System.out.println("接收到對象："+obj + "");
                ((ClientDemo)obj).printDemo();
            } catch (Exception e) ...{
                System.out.println("不要使用IE訪問該服務！");
                isIE = true;
            }
            
            if (!isIE) ...{
                // 輸出
                ServletOutputStream outputStream = response.getOutputStream();
                BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(outputStream);
                ObjectOutputStream objectOutputStream = new ObjectOutputStream(bufferedOutputStream);
                objectOutputStream.writeObject("我是返回對象B");
                objectOutputStream.close();
            }else ...{
                response.setContentType("text/html;charset=gbk");
                PrintWriter out=response.getWriter();   
                out.print("<p align=center><font size=3 color=red>不要使用IE訪問該服務！:(</font></p>"); 
                out.flush();
                out.close();
            }        
        } catch (Exception e) ...{
            e.printStackTrace();
        }
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException ...{
        doPost(request, response);
    }
}