JAVA程序通过后台登陆网站,获取Session,然后再POST Http Request添加数据到数据库的实例

关键字: java http session http request 后台登陆网站

 * 1,在HTTP的WEB应用中, 应用客户端和服务器之间的状态是通过Session来维持的, 而Session的本质就是Cookie,
 * 简单的讲,当浏览器向服务器发送Http请求的时候, HTTP服务器会产生一个SessionID,这个SessionID就唯一的标识了一个客户端到服务器的请求会话过程.
 * 就如同一次会议开始时,主办方给每位到场的嘉宾一个临时的编号胸牌一样, 可以通过这个编号记录每个嘉宾(客户端)的活动(请求状态).
 * 为了保持这个状态, 当服务端向客户端回应的时候,会附带Cookie信息,当然,Cookie里面就包含了SessionID
 * 客户端在执行一系列操作时向服务端发送请求时,也会带上这个SessionID, 一般来说,Session也是一个URL QueryParameter ,就是说,session可以以Key-Value的形式通过URL传递
 * 比如,http://www.51etest.com/dede/login.php?PHPSESSIONID=7dg3dsf19SDf73wqc32fdsf
 * 一般而言,浏览器会自动把此Session信息放入Header报文体中进行传递.
 * 如果浏览器不支持Cookie,那么,浏览器会自动把SessionID附加到URL中去.
 *
 * 2,在这个例子中,以登陆这个功能点进行讲解.
 * 首先,我们登陆的页面是http://www.51etest.com/dede, 我们第一次访问这个页面后,可以从服务器过来的Http Response报文中的Header中找出服务器与浏览器向关联的数据 -- Cookie,
 * 而且Session的值也在Cookie中. 于是,我们可以通过分析Set-Cookie这个Header中的参数的值,找到Seesion的Key-Value段.
 * 然后,我们再向服务器发送请求,请求URL为:post@@http://www.51etest.com/dede/login.php@@userid=admin&pwd=tidus2005&gotopage=/dede/&dopost=login
 * 服务器验证登陆成功了, 并且在此次会话变量中增加了我们登陆成功的标识.
 *
 * 3,增加一个广告定义
 * 增加一个广告定义其实就是一个添加数据的过程,无非是我们把我们要添加的数据通过参数的形式告诉指定url页面,页面获取后添加到数据库去而已.
 * 此url地址为:
 * post@@http://www.51etest.com/dede/ad_add.php@@dopost=save&tagname=test&typeid=0&adname=test&starttime=2008-05-29
 * 因为这个页面会先判断我是否登陆
 * 而判断的依据，前面讲了，就是根据我请求时的SessionID找到指定的Session数据区中是否存在我的登陆信息，
 * 所以我当然要把访问登陆页面时获取的SessionID原封不动的再发回去
 * 相当于对服务器说，这是我刚刚来时，你发我的临时身份证，我现在可以形势我的权利。
 *
 * 这就是整个Java后台登陆网站，然后添加数据的过程。

 

Java代码

1. package cn.javadr.product;   
2.   
3. import java.io.BufferedReader;   
4. import java.io.IOException;   
5. import java.io.InputStream;   
6. import java.io.InputStreamReader;   
7. import java.io.OutputStream;   
8. import java.net.HttpURLConnection;   
9. import java.net.MalformedURLException;   
10. import java.net.URL;   
11. import java.net.URLConnection;   
12. import java.util.HashMap;   
13. import java.util.Iterator;   
14. import java.util.Map;   
15. import java.util.Map.Entry;   
16.   
17. /**  
18.  * HttpClient  
19.  *   
20.  * @author Tang Ren email: <a  
21.  *         href="mailto:[e-mail]">[e-mail]</a>  
22.  *   
23.  * <A href="mailto:post@@http://www.51etest.com/dede/login.php@@userid=xxxx&pwd=xxxxxx&gotopage=/dede/&dopost=login">post@@http://www.51etest.com/dede/login.php@@userid=xxxx&pwd=xxxxxx&gotopage=/dede/&dopost=login  
24. </A> *   
25.  * post@@http://www.51etest.com/dede/ad_add.php@@dopost=save&tagname=test&typeid=0&adname=test&starttime=2008-05-29  
26.  * 20:58:25&endtime=2008-06-28 20:58:25×et=0&normbody=test&expbody=test  
27.  *   
28.  */  
29.   
30. /**  
31.  *   
32.  */  
33. public class HttpClient {   
34.   
35.     private static final String USER_AGENT_VALUE = "Mozilla/4.0 (compatible; MSIE 6.0; Windows XP)";   
36.   
37.     /**  
38.      * Cmd splitor default is symbol '$$'.  
39.      */  
40.     private static final String HTTP_CLIENT_CMD_SPLITOR = "@@";   
41.   
42.     /**  
43.      * Post parameter splitor default is symbol '&'.  
44.      */  
45.     private static final String POST_PARAMETER_SPLITOR = "&";   
46.   
47.     private static final String POST_PARAMETER_KV_SPLITOR = "=";   
48.   
49.     private String cookie = null;   
50.   
51.     private Map cookieMap = new HashMap();   
52.   
53.     public static void main(String[] args) {   
54.         HttpClient client = new HttpClient();   
55.     }   
56.   
57.     public HttpClient() {   
58.         // Input http request url   
59.   
60.         BufferedReader consleReader = new BufferedReader(new InputStreamReader(   
61.                 System.in));   
62.         String httpResponse = null;   
63.         String url = null;   
64.         String cmd = null;   
65.         String method = null;   
66.         try {   
67.             while (true) {   
68.                 cmd = consleReader.readLine();   
69.                 if (cmd.indexOf(HTTP_CLIENT_CMD_SPLITOR) == -1)   
70.                     continue;   
71.   
72.                 method = cmd.split(HTTP_CLIENT_CMD_SPLITOR)[0];   
73.                 url = cmd.split(HTTP_CLIENT_CMD_SPLITOR)[1];   
74.                 if (method.toUpperCase().equals("GET")) {   
75.                     httpResponse = this.getMethod(url, true);   
76.                 } else if (method.toUpperCase().equals("POST")) {   
77.                     Map parameters = this.parsePostParameters(cmd   
78.                             .split(HTTP_CLIENT_CMD_SPLITOR)[2]);   
79.                     httpResponse = this.postMethod(url, parameters, true);   
80.                 }   
81.                 System.out.println(httpResponse);   
82.             }   
83.         } catch (IOException e) {   
84.             e.printStackTrace();   
85.         } finally {   
86.             try {   
87.                 consleReader.close();   
88.             } catch (IOException e) {   
89.                 e.printStackTrace();   
90.             }   
91.         }   
92.   
93.     }   
94.   
95.     /**  
96.      * Request specifid url with 'GET' method. And return HTTP response content.  
97.      *   
98.      * @param url  
99.      * @return  
100.      */  
101.     private String getMethod(String url, boolean keepCookie) {   
102.         if (url == null || url.length() == 0) {   
103.             return "Requst url could not be null or empty.";   
104.         }   
105.   
106.         StringBuffer result = new StringBuffer();   
107.         try {   
108.             HttpURLConnection httpURLConnection = this.getHttpURLConnection(   
109.                     url, keepCookie);   
110.   
111.             // Set request properties.   
112.             this.settingHttpRequestHeader(httpURLConnection);   
113.   
114.             httpURLConnection.setRequestMethod("GET");   
115.   
116.             // Getting or setting cookie   
117.             this.gettingOrSettingCookie(httpURLConnection, keepCookie);   
118.   
119.             InputStream httpInputStream = httpURLConnection.getInputStream();   
120.             BufferedReader httpBufferedReader = new BufferedReader(   
121.                     new InputStreamReader(httpInputStream, "GBK"));   
122.             result.append(this.readBufferedContent(httpBufferedReader));   
123.   
124.             // Connect to host.   
125.             httpURLConnection.connect();   
126.         } catch (IOException e) {   
127.             e.printStackTrace();   
128.             return "getHttpURLConnection failed.";   
129.         }   
130.         return result.toString();   
131.     }   
132.   
133.     public String postMethod(String url, Map parameters, boolean keepCookie) {   
134.         StringBuffer httpResponse = new StringBuffer();   
135.   
136.         HttpURLConnection httpURLConnection = null;   
137.         OutputStream httpOutputStream = null;   
138.         try {   
139.             httpURLConnection = this.getHttpURLConnection(url, keepCookie);   
140.             // Set request properties.   
141.             this.settingHttpRequestHeader(httpURLConnection);   
142.   
143.             // Set request method with 'POST'   
144.             httpURLConnection.setRequestMethod("POST");   
145.   
146.             // Set connection output is true.   
147.             httpURLConnection.setDoOutput(true);   
148.             // Getting or setting cookie   
149.             this.gettingOrSettingCookie(httpURLConnection, keepCookie);   
150.             // Get Http output stream   
151.             httpOutputStream = httpURLConnection.getOutputStream();   
152.   
153.             // Build post parameters string   
154.             StringBuffer postParams = new StringBuffer();   
155.             int index = 0;   
156.             for (Iterator<Entry> iter = parameters.entrySet().iterator(); iter   
157.                     .hasNext(); index++) {   
158.                 Entry<String, String> entry = iter.next();   
159.                 postParams.append(index != 0 ? "&" : "");   
160.                 postParams.append(entry.getKey());   
161.                 postParams.append("=");   
162.                 postParams.append(entry.getValue());   
163.             }   
164.             httpOutputStream.write(postParams.toString().getBytes());   
165.   
166.             BufferedReader httpBufferedReader = new BufferedReader(   
167.                     new InputStreamReader(httpURLConnection.getInputStream()));   
168.             httpResponse.append(this.readBufferedContent(httpBufferedReader));   
169.         } catch (IOException e) {   
170.             e.printStackTrace();   
171.             return null;   
172.         } finally {   
173.             try {   
174.                 httpOutputStream.close();   
175.             } catch (IOException e) {   
176.                 e.printStackTrace();   
177.             }   
178.         }   
179.   
180.         return httpResponse.toString();   
181.     }   
182.   
183.     /**  
184.      * Setting HTTP request header properties  
185.      *   
186.      * @param httpURLConnection  
187.      */  
188.     private void settingHttpRequestHeader(HttpURLConnection httpURLConnection) {   
189.         if (httpURLConnection == null)   
190.             return;   
191.         httpURLConnection.setRequestProperty("User-Agent", USER_AGENT_VALUE);   
192.         // TODO setting some other properties here . . .   
193.     }   
194.   
195.     /**  
196.      * Get HttpURLConnection by specified url string.  
197.      *   
198.      * @param url  
199.      * @return  
200.      * @throws IOException  
201.      */  
202.     private HttpURLConnection getHttpURLConnection(String url,   
203.             boolean keepCookie) throws IOException {   
204.         URL urlObj = new URL(url);   
205.         URLConnection urlConnection = urlObj.openConnection();   
206.         if (urlConnection instanceof HttpURLConnection)   
207.             return (HttpURLConnection) urlConnection;   
208.         throw new MalformedURLException();   
209.     }   
210.   
211.     /**  
212.      * Read bufferedReader buffered content.  
213.      *   
214.      * @param bufferedReader  
215.      * @return  
216.      */  
217.     private String readBufferedContent(BufferedReader bufferedReader) {   
218.         if (bufferedReader == null)   
219.             return null;   
220.         StringBuffer result = new StringBuffer();   
221.         String line = null;   
222.         try {   
223.             while ((line = bufferedReader.readLine()) != null) {   
224.                 result.append(line);   
225.             }   
226.         } catch (IOException e) {   
227.             e.printStackTrace();   
228.             return null;   
229.         }   
230.         return result.toString();   
231.     }   
232.   
233.     /**  
234.      * Parse and create parameter map with parameter string  
235.      *   
236.      * @param parameterString  
237.      * @return  
238.      */  
239.     private Map parsePostParameters(String parameterString) {   
240.         if (parameterString == null || parameterString.length() == 0)   
241.             return null;   
242.         Map result = new HashMap<String, String>();   
243.   
244.         // only one parameter key-value pair   
245.         if (parameterString.indexOf(POST_PARAMETER_SPLITOR) == -1) {   
246.             if (parameterString.indexOf(POST_PARAMETER_KV_SPLITOR) != -1)   
247.                 result.put(parameterString.split(POST_PARAMETER_KV_SPLITOR)[0],   
248.                         parameterString.split(POST_PARAMETER_KV_SPLITOR)[1]);   
249.         } else {   
250.             String[] keyValues = parameterString.split(POST_PARAMETER_SPLITOR);   
251.             for (int i = 0; i < keyValues.length; i++) {   
252.                 String keyValue = keyValues[i];   
253.                 result.put(keyValue.split(POST_PARAMETER_KV_SPLITOR)[0],   
254.                         keyValue.split(POST_PARAMETER_KV_SPLITOR)[1]);   
255.             }   
256.         }   
257.         return result;   
258.     }   
259.   
260.     /**  
261.      * Get or set cookie.  
262.      *   
263.      * @param httpURLConnection  
264.      * @param keepCookie  
265.      */  
266.     private void gettingOrSettingCookie(HttpURLConnection httpURLConnection,   
267.             boolean keepCookie) {   
268.         // Getting or setting cookie.   
269.         if (cookie == null || cookie.length() == 0) {   
270.             String setCookie = httpURLConnection.getHeaderField("Set-Cookie");   
271.             cookie = setCookie.substring(0, setCookie.indexOf(";"));   
272.         } else if (keepCookie) {   
273.             httpURLConnection.setRequestProperty("Cookie", cookie);   
274.         }   
275.     }   
276. }  

package cn.javadr.product;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Map.Entry;/** * HttpClient *  * @author Tang Ren email: <a *         href="mailto:[e-mail]">[e-mail]</a> *  * post@@http://www.51etest.com/dede/login.php@@userid=xxxx&pwd=xxxxxx&gotopage=/dede/&dopost=login *  * post@@http://www.51etest.com/dede/ad_add.php@@dopost=save&tagname=test&typeid=0&adname=test&starttime=2008-05-29 * 20:58:25&endtime=2008-06-28 20:58:25×et=0&normbody=test&expbody=test *  *//** *  */public class HttpClient {private static final String USER_AGENT_VALUE = "Mozilla/4.0 (compatible; MSIE 6.0; Windows XP)";/** * Cmd splitor default is symbol '$'. */private static final String HTTP_CLIENT_CMD_SPLITOR = "@@";/** * Post parameter splitor default is symbol '&'. */private static final String POST_PARAMETER_SPLITOR = "&";private static final String POST_PARAMETER_KV_SPLITOR = "=";private String cookie = null;private Map cookieMap = new HashMap();public static void main(String[] args) {HttpClient client = new HttpClient();}public HttpClient() {// Input http request urlBufferedReader consleReader = new BufferedReader(new InputStreamReader(System.in));String httpResponse = null;String url = null;String cmd = null;String method = null;try {while (true) {cmd = consleReader.readLine();if (cmd.indexOf(HTTP_CLIENT_CMD_SPLITOR) == -1)continue;method = cmd.split(HTTP_CLIENT_CMD_SPLITOR)[0];url = cmd.split(HTTP_CLIENT_CMD_SPLITOR)[1];if (method.toUpperCase().equals("GET")) {httpResponse = this.getMethod(url, true);} else if (method.toUpperCase().equals("POST")) {Map parameters = this.parsePostParameters(cmd.split(HTTP_CLIENT_CMD_SPLITOR)[2]);httpResponse = this.postMethod(url, parameters, true);}System.out.println(httpResponse);}} catch (IOException e) {e.printStackTrace();} finally {try {consleReader.close();} catch (IOException e) {e.printStackTrace();}}}/** * Request specifid url with 'GET' method. And return HTTP response content. *  * @param url * @return */private String getMethod(String url, boolean keepCookie) {if (url == null || url.length() == 0) {return "Requst url could not be null or empty.";}StringBuffer result = new StringBuffer();try {HttpURLConnection httpURLConnection = this.getHttpURLConnection(url, keepCookie);// Set request properties.this.settingHttpRequestHeader(httpURLConnection);httpURLConnection.setRequestMethod("GET");// Getting or setting cookiethis.gettingOrSettingCookie(httpURLConnection, keepCookie);InputStream httpInputStream = httpURLConnection.getInputStream();BufferedReader httpBufferedReader = new BufferedReader(new InputStreamReader(httpInputStream, "GBK"));result.append(this.readBufferedContent(httpBufferedReader));// Connect to host.httpURLConnection.connect();} catch (IOException e) {e.printStackTrace();return "getHttpURLConnection failed.";}return result.toString();}public String postMethod(String url, Map parameters, boolean keepCookie) {StringBuffer httpResponse = new StringBuffer();HttpURLConnection httpURLConnection = null;OutputStream httpOutputStream = null;try {httpURLConnection = this.getHttpURLConnection(url, keepCookie);// Set request properties.this.settingHttpRequestHeader(httpURLConnection);// Set request method with 'POST'httpURLConnection.setRequestMethod("POST");// Set connection output is true.httpURLConnection.setDoOutput(true);// Getting or setting cookiethis.gettingOrSettingCookie(httpURLConnection, keepCookie);// Get Http output streamhttpOutputStream = httpURLConnection.getOutputStream();// Build post parameters stringStringBuffer postParams = new StringBuffer();int index = 0;for (Iterator<Entry> iter = parameters.entrySet().iterator(); iter.hasNext(); index++) {Entry<String, String> entry = iter.next();postParams.append(index != 0 ? "&" : "");postParams.append(entry.getKey());postParams.append("=");postParams.append(entry.getValue());}httpOutputStream.write(postParams.toString().getBytes());BufferedReader httpBufferedReader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));httpResponse.append(this.readBufferedContent(httpBufferedReader));} catch (IOException e) {e.printStackTrace();return null;} finally {try {httpOutputStream.close();} catch (IOException e) {e.printStackTrace();}}return httpResponse.toString();}/** * Setting HTTP request header properties *  * @param httpURLConnection */private void settingHttpRequestHeader(HttpURLConnection httpURLConnection) {if (httpURLConnection == null)return;httpURLConnection.setRequestProperty("User-Agent", USER_AGENT_VALUE);// TODO setting some other properties here . . .}/** * Get HttpURLConnection by specified url string. *  * @param url * @return * @throws IOException */private HttpURLConnection getHttpURLConnection(String url,boolean keepCookie) throws IOException {URL urlObj = new URL(url);URLConnection urlConnection = urlObj.openConnection();if (urlConnection instanceof HttpURLConnection)return (HttpURLConnection) urlConnection;throw new MalformedURLException();}/** * Read bufferedReader buffered content. *  * @param bufferedReader * @return */private String readBufferedContent(BufferedReader bufferedReader) {if (bufferedReader == null)return null;StringBuffer result = new StringBuffer();String line = null;try {while ((line = bufferedReader.readLine()) != null) {result.append(line);}} catch (IOException e) {e.printStackTrace();return null;}return result.toString();}/** * Parse and create parameter map with parameter string *  * @param parameterString * @return */private Map parsePostParameters(String parameterString) {if (parameterString == null || parameterString.length() == 0)return null;Map result = new HashMap<String, String>();// only one parameter key-value pairif (parameterString.indexOf(POST_PARAMETER_SPLITOR) == -1) {if (parameterString.indexOf(POST_PARAMETER_KV_SPLITOR) != -1)result.put(parameterString.split(POST_PARAMETER_KV_SPLITOR)[0],parameterString.split(POST_PARAMETER_KV_SPLITOR)[1]);} else {String[] keyValues = parameterString.split(POST_PARAMETER_SPLITOR);for (int i = 0; i < keyValues.length; i++) {String keyValue = keyValues[i];result.put(keyValue.split(POST_PARAMETER_KV_SPLITOR)[0],keyValue.split(POST_PARAMETER_KV_SPLITOR)[1]);}}return result;}/** * Get or set cookie. *  * @param httpURLConnection * @param keepCookie */private void gettingOrSettingCookie(HttpURLConnection httpURLConnection,boolean keepCookie) {// Getting or setting cookie.if (cookie == null || cookie.length() == 0) {String setCookie = httpURLConnection.getHeaderField("Set-Cookie");cookie = setCookie.substring(0, setCookie.indexOf(";"));} else if (keepCookie) {httpURLConnection.setRequestProperty("Cookie", cookie);}}}

 

Java代码

1. 本人水平有限,大家如果有任何问题,欢迎和我讨论.  

本人水平有限,大家如果有任何问题,欢迎和我讨论.

Java代码

1. 联系方式Email: <A href="mailto:[e-mail]">[e-mail]</A>   
2. QQ: 580126