GET方式 布局 VideoService
实验：提交视频名称、时长信息
url：
资源
< string name ="app_name" >VideoClient </ string > < string name ="name" >视频名称 </ string > < string name ="timeLength" >时长 </ string > < string name ="save" >保存 </ string > < string name ="success" >数据保存成功 </ string > < string name ="fail" >数据保存失败 </ string > < string name ="error" >网络连接失败 </ string > < string name ="videoFile" >视频文件 </ string >
< TextView android:layout_width ="fill_parent" android:layout_height ="wrap_content" android:text ="@string/name" /> < EditText android:id ="@+id/nameEt" android:layout_width ="match_parent" android:layout_height ="wrap_content" > < requestFocus /> </ EditText > < TextView android:layout_width ="fill_parent" android:layout_height ="wrap_content" android:text ="@string/timeLength" /> < EditText android:id ="@+id/timeLengthEt" android:layout_width ="match_parent" android:layout_height ="wrap_content" > </ EditText > < Button android:id ="@+id/saveBtn" android:layout_width ="wrap_content" android:layout_height ="wrap_content" android:text ="save" />
public static boolean save(String name, String timeLength) throws Exception { String path = "http://192.168.1.102:8080/videoweb/video/manage.do"; Map<String, String> params = new HashMap<String, String>(); params.put("name", name); params.put("timelength", timeLength); params.put("method", "save"); return sendPostRequestHttpClient(path, params, "UTF-8"); } private static boolean sendPostRequestHttpClient(String path, Map<String, String> params, String string) throws Exception { // http://192.168.1.102 :8080/videoweb/video/manage.do?method=save&name=xxx&timelength=90 StringBuilder pathBuilder = new StringBuilder(path); pathBuilder.append("?"); for (Map.Entry<String, String> entry : params.entrySet()) { pathBuilder.append(entry.getKey()).append("=") .append(entry.getValue()).append("&"); } pathBuilder.deleteCharAt(pathBuilder.length() - 1); URL url = new URL(pathBuilder.toString()); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5000); if (conn.getResponseCode() == 200) { return true; } return false; }
测试方法代码
VideoServiceTest
public void testSave() throws Throwable{ VideoService.save("Sucan", "80"); }
中文字符解决方案：
服务器端代码：
VideoForm formbean = (VideoForm)form; if("GET".equals(request.getMethod())){ String name = new String(request.getParameter("name") .getBytes("ISO8859-1"),"UTF-8"); System.out.println("视频名称: "+ name); System.out.println("时长: "+formbean.getTimelength()); } else{ System.out.println("视频名称: "+formbean.getName()); System.out.println("时长: "+formbean.getTimelength()); }
客户端的VideoService中
POST方式
修改服务器端代码
Index.jsp
< form action ="http://192.168.1.102:8080/videoweb/video/manage.do" method ="post" > < input type ="hidden" name ="method" value ="save" >< br /> 视频名称： < input type ="text" name ="name" value ="" >< br /> 时长： < input type ="text" name ="timelength" value ="" >< br /> < input type ="submit" value ="提交" > </ form >
利用HttpWatch对post传输进行简单讲解：
POST /videoweb/video/manage.do HTTP/1.1 Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* Referer: http://192.168.1.102:8080/videoweb/ Accept-Language: zh-cn,en-GB ; q=0.5 User-Agent: Mozilla/4.0 (compatible ; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727) Content-Type: application/x-www-form-urlencoded Accept-Encoding: gzip, deflate Host: 192.168.1.102:8080 Content-Length: 34 Connection: Keep-Alive Cache-Control: no-cache Cookie: JSESSIONID=AE51607F874103B085624AD38C68CF56 method=save&name=xxxx&timelength=2
编写业务类方法（VideoService）
private static boolean sendPostRequestHttpClient(String path, Map<String, String> params, String encoding) throws Exception { /* * Content-Type: application/x-www-form-urlencoded * Content-Length: 34 * method=save&name=xxxx&timelength=2 */ StringBuffer sb = new StringBuffer(""); if (params != null && !params.isEmpty()) { for (Map.Entry<String, String> entry : params.entrySet()) { sb.append(entry.getKey()).append("=") // .append(entry.getValue()).append("&"); .append(URLEncoder.encode(entry.getValue(), encoding)).append('&'); // url编码，解决中文乱码 } sb.deleteCharAt(sb.length() - 1); } byte[] data = sb.toString().getBytes(); // 得到实体数据eg. method=save&name=xxxx&timelength=2 URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setConnectTimeout(5000); conn.setDoOutput( true); // 允许通过POST方式提交数据，必须允许输出 conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("Content-Length", String.valueOf(data.length)); OutputStream outStream = conn.getOutputStream(); outStream.write(data); outStream.flush(); outStream.close(); if (conn.getResponseCode() == 200) { return true; } return false; }
修改save方法
// return sendGetRequestHttpClient(path, params, "UTF-8"); return sendPostRequest(path, params, "UTF-8");
运行客户端，测试代码，查看服务器后台打印
解释Post方式下中文乱码的处理：服务器端增加过滤器
HttpClient
简介
HTTP 协议可能是现在 Internet 上使用得最多、最重要的协议了，越来越多的 Java 需要直接通过 HTTP 协议来访问。虽然在 JDK 的 java net包中已经提供了访问 HTTP 协议的基本功能，但是对于大部分应用程序来说，JDK 库本身提供的功能还不够丰富和灵活。HttpClient 是 Apache Jakarta Common 下的子项目，用来提供高效的、最新的、功能丰富的支持 HTTP 协议的编程工具包，并且它支持 HTTP 协议最新的版本和建议。HttpClient 已经应用在很多的项目中，比如 Apache Jakarta 上很著名的另外两个开源项目 Cactus 和 HTMLUnit 都使用了 HttpClient。现在HttpClient最新版本为 HttpClient 4.1.1
HttpClient 功能介绍
以下列出的是 HttpClient 提供的主要的功能，要知道更多详细的功能可以参见 HttpClient 的主页。
（1）实现了所有 HTTP 的方法（GET,POST,PUT,HEAD 等）
（2）支持自动转向
（3）支持 HTTPS 协议
（4）支持代理服务器等
实验步骤
在VideoService中添加方法sendRequestHttpClient
// HTTPS SSL COOKIE private static boolean sendRequestHttpClient(String path, Map<String, String> params, String encoding) throws Exception { List<NameValuePair> paramPairs = new ArrayList<NameValuePair>(); if(params!= null && !params.isEmpty()){ for(Map.Entry<String, String> entry: params.entrySet()){ BasicNameValuePair param = new BasicNameValuePair(entry.getKey(),entry.getValue()); paramPairs.add(param); } } UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramPairs, encoding); HttpPost post = new HttpPost(path); post.setEntity(entity); DefaultHttpClient client = new DefaultHttpClient(); // 浏览器 HttpResponse response = client.execute(post); /* * HTTP/1.1 200 OK * Server: Apache-Coyote/1.1 * Content-Type: text/html;charset=UTF-8 * Content-Length: 14 * Date: Thu, 22 Dec 2011 15:07:38 GMT * *淇濆瓨鎴愬 * */ if(response.getStatusLine().getStatusCode() == 200){ return true; } return false; }
修改save方法
// return sendGetRequestHttpClient(path, params, "UTF-8"); // return sendPostRequest(path, params, "UTF-8"); return sendRequestHttpClient(path, params, "UTF-8");
运行客户端，测试，查看服务器输出
url: