（转）Java 实现简单http服务端，客户端DEMO

其中用到一个加密解密工具类，如下：

 

import java.security.SecureRandom;    
import javax.crypto.Cipher;    
import javax.crypto.SecretKey;    
import javax.crypto.SecretKeyFactory;    
import javax.crypto.spec.DESKeySpec;    
   
import sun.misc.BASE64Decoder;    
import sun.misc.BASE64Encoder;    
   
   
public class DESHelper {    
    /**   
     * 加密解密接口   
     * @param data      数据   
     * @param password  加密解密密码 必须8位字节   
     * @param flag      加密解密标志 0：加密 ，1：解密   
     * @return   
     */   
    public static String doWork(String data, String password,int flag) {    
        try {    
            SecureRandom random = new SecureRandom();    
            DESKeySpec desKey = new DESKeySpec(password.getBytes());    
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");    
            SecretKey securekey = keyFactory.generateSecret(desKey);    
            Cipher cipher = Cipher.getInstance("DES");    
            //     
            if(flag == 0){    
                BASE64Encoder base64encoder = new BASE64Encoder();    
                cipher.init(Cipher.ENCRYPT_MODE, securekey, random);    
                return base64encoder.encode(cipher.doFinal(data.getBytes("UTF-8")));    
            }else{    
                BASE64Decoder base64decoder = new BASE64Decoder();    
                byte[] encodeByte = base64decoder.decodeBuffer(data);    
                cipher.init(Cipher.DECRYPT_MODE, securekey, random);    
                byte[] decoder = cipher.doFinal(encodeByte);    
                return new String(decoder,"UTF-8");    
            }    
                
        } catch (Exception e) {    
            e.printStackTrace();    
        }    
        return null;    
    }    
        
    /**   
     * test   
     * @param args   
     */   
    public static void main(String[] args) {    
        try {    
            // 明文    
            String str = "mobile:15810557051|type:0|content:你好";    
            // 密码    
            String password = "01010101";    
            String desc = DESHelper.doWork(str, password,0);    
            System.out.println("密文：" + desc);    
            // 解密    
            str = DESHelper.doWork(desc, password,1);    
            System.out.println("明文：" +str);    
        } catch (Exception e1) {    
            e1.printStackTrace();    
        }    
   
    }    
}  

 

服务端需要一个jsp及一个java类，jsp直接调java类，或者直接写在servlet中也可以，服务端如下：

 

import java.io.BufferedReader;    
import java.io.IOException;    
import java.io.InputStreamReader;    
import java.io.OutputStreamWriter;    
import java.net.MalformedURLException;    
   
import javax.servlet.http.HttpServletRequest;    
import javax.servlet.http.HttpServletResponse;    
   
import com.sohu.lq.pub.util.DESHelper;    
   
public class Server {    
    public static void post(HttpServletRequest request,HttpServletResponse response){    
        String result = "";    
        try {    
            request.setCharacterEncoding("UTF-8");    
            BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));    
            String line = "";    
            StringBuffer buf = new StringBuffer();    
            while ( (line = br.readLine()) != null ) {    
                buf.append(line);    
            }    
            result = buf.toString();    
            System.out.println(DESHelper.doWork(result, "01010101", 1));    
               
                
            response.setHeader("cache-control", "no-cache");    
            response.setCharacterEncoding("UTF-8");    
            response.setContentType("text/html");    
            OutputStreamWriter out = new OutputStreamWriter(response.getOutputStream());        
            String xmlInfo = "mobile:用户号码|type:运营商标志|content:你好";    
            out.write(DESHelper.doWork(xmlInfo, "01010101", 0));    
            out.flush();    
            out.close();    
            //System.out.println("返回："+xmlInfo);    
        } catch (MalformedURLException e) {    
            e.printStackTrace();    
        } catch (IOException e) {    
            e.printStackTrace();    
        }    
        //return "toff :  "+result;    
    }    
}  

 

server.jsp页面如下：

<%@ page contentType="text/html; charset=gbk"%>    
<%    
   com.sohu.sms.bus.Server.post(request,response);    
%>  

 加入该jsp部署在本地，地址为：http://localhost:8080/sms/media/bus/server.jsp

客户端实现如下：

import java.io.BufferedReader;    
import java.io.IOException;    
import java.io.InputStreamReader;    
import java.io.OutputStreamWriter;    
import java.net.MalformedURLException;    
import java.net.URL;    
import java.net.URLConnection;    
   
import com.sohu.lq.pub.util.DESHelper;    
   
public class Client {    
    public static void post(){    
        String result = "";    
        try {    
            String urlStr = "http://localhost:8080/sms/media/bus/server.jsp";    
            URL url = new URL(urlStr);    
            URLConnection con = url.openConnection();    
            con.setDoOutput(true);    
            con.setRequestProperty("Pragma:", "no-cache");    
            con.setRequestProperty("Cache-Control", "no-cache");    
            con.setRequestProperty("Content-Type", "text/html");    
                
            OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream());        
            String xmlInfo = "mobile:用户号码|type:运营商标志|content:我来了";    
            out.write(DESHelper.doWork(xmlInfo, "01010101", 0));    
            out.flush();    
            out.close();    
                
            BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));    
            String line = "";    
            StringBuffer buf = new StringBuffer();    
            while ( (line = br.readLine()) != null ) {    
                buf.append(line);    
            }    
            result = buf.toString();    
            result = DESHelper.doWork(result, "01010101", 1);    
            System.out.println("回复："+result);    
            //result = new String(DESHelper.doWork(result, "sopu01hz", 1));    
            //System.out.println(result);    
        } catch (MalformedURLException e) {    
            e.printStackTrace();    
        } catch (IOException e) {    
            e.printStackTrace();    
        }    
    }    
    public static void main(String[] args){    
        Client.post();    
    }    
}  

 直接执行Client.java结果如下：

回复：mobile:用户号码|type:运营商标志|content:你好

该实例只是简单实现服务客户端模式，代码还需要优化，目前发送内容可以有多种方式，比如直接socket实现，或http实现，或者通过发布webservice实现，传输数据可以多种多样，标准的一般通过传输xml格式数据或json格式数据；目前json开源框架很多，可以进行json序列化反序列化，我用到一个XStream开源框架，来进行java对象与xml序列化反序列化，同时直接java对象与json序列化反序列化。

如果要做为多平台接口，建议通过发送标准的xml格式或json格式数据，这样扩展性更好。