（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：
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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：
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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。
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