Obtain real-time stock data of a website

The following code parses the wap php webpage and JSP webpage. If you want to parse the JSP webpage, the code can be simpler.

/*** From http://blog.csdn.net/hellogv/ * This Unit is responsible for the global function */import Java. io. *; import Java. util. *; import javax. microedition. MIDlet. *; import javax. microedition. lcdui. *; import javax. microedition. io. *; import javax. microedition. RMS. *; import Java. lang. string; public class cls_stock {recordstore rs = NULL; Public cls_stock () {}// ------------------------------------- the following core code ------------------------------------------- ------------- // Return the specified character from [Stock info]. From str_content, extract the Public String getsubstr (string str_content, string separator, string str_end) {int pos1 = str_content.indexof (separator) + separator. length (); int pos2 = 0; If (str_end = NULL) pos2 = str_content.length (); If (str_end! = NULL) pos2 = str_content.indexof (str_end, pos1); Return str_content.substring (pos1, pos2);} // connect to the specified URL to obtain stock information. connectnet () controls returnstock () public String connectnet (string URL, string separator, string end, string [] strs_filter) {try {httpconnection Hc = (httpconnection) connector. open (URL, connector. read_write); HC. setrequestmethod (httpconnection. post); dataoutputstream dos = HC. opendataoutputstream (); Datainputstream Dis = new datainputstream (HC. openinputstream (); // ------------------------- key code: Step 1: download the data from the entire webpage -------------------------------- byte [] STR = new byte [2000]; // apply for DIS from the memory. read (STR); // Save the returned read information in STR string content = xmltostring (STR, strs_filter); // convert STR to string // ----------------------- key code: step 2 extract key data -------------------------------- content = returnstock (content, separator, end, strs_filter ); Return content;} catch (exception e) {return "error! /N may be a network connection error, the stock does not exist at all, or the stock is closed now! ";}// If an error occurs, an empty character is returned.} Public String xmltostring (byte [] rec, string [] strs_filter) {// read bytearrayinputstream BAIS = new bytearrayinputstream (REC); datainputstream Dis = new datainputstream (BAIS); string BTS = NULL; try {BTS = new string (REC, "UTF-8"); BAIS. close (); DIS. close ();} catch (exception e) {e. printstacktrace ();} If (BTS. indexof ("")> 0) // if it cannot be converted to Chinese characters, filter and convert (improve efficiency) {for (INT I = 0; I <strs_filter.length; I ++) // replace Chinese characters with UTF code {BTS = replacestr (BTS, gbtoutf (strs_filter [I]), strs_filter [I]) cyclically Based on fields;} return BTS ;} // search for useful stock information from a bunch of XML Code // use the strs_filter element as the start of the search string // end as the end // separator as the Public String sign to separate the header and tail returnstock (string content, string separator, string end, string [] strs_filter) {string STR = "", str_fieldname = ""; for (INT I = 0; I <strs_filter.length; I ++) {int pos1 = content. indexof (strs_filter [I]); int pos2 = content. indexof (separator, pos1 + 1); int pos3 = content. indexof (end, pos2 + 1); str_fieldname = content. substring (pos1, pos1 + strs_filter [I]. length (); STR = STR + "/N" + str_fieldname + content. substring (pos2, pos3);} return STR;} // ---------------------- two functions: gbtoutf, replacestr works with --------------------------------- // convert Chinese characters to UTF code public static string gbtoutf (string gb2312string) {If (gb2312string = NULL) {return NULL ;} stringbuffer sb = new stringbuffer (gb2312string. length () * 8); Int J = 0; For (INT I = 0; I <gb2312string. length (); I ++) {J = gb2312string. charat (I); sb. append (""); sb. append (integer. tohexstring (j ). tolowercase (); sb. append (";");} return sb. tostring () ;}// replace string function public static string replacestr (string STR, string oldstr, string replace) {for (INT I = Str. indexof (oldstr); I> = 0; I = Str. indexof (oldstr, I-1) {if (I = 0) {STR = replace + Str. substring (I + 1, str. length ();} else {STR = Str. substring (0, I) + replace + Str. substring (I + 1, str. length () ;}} return STR ;}// ---------------------- use the above two functions gbtoutf and replacestr together --------------------------------- // compile the above core code example --------------------------------------------------------