- /**
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- *本文来自http://blog.csdn.net/hellogv/
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- * 这个单元负责全局函数
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- */
-
- import java.io.*;
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- import java.util.*;
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- import javax.microedition.midlet.*;
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- import javax.microedition.lcdui.*;
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- import javax.microedition.io.*;
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- import javax.microedition.rms.*;
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- import java.lang.String;
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-
-
-
-
- public class cls_Stock {
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- RecordStore rs=null;
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- public cls_Stock() {
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- }
-
- //-----------------------------------以下核心代码--------------------------------------------------------
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- //从【股票信息】中返回指定的字符,从str_content中,提取开头为separator,结尾为str_end的之间的字符串
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- public String GetSubStr(String str_content,String separator,String str_end)
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- {
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- int pos1=str_content.indexOf(separator)+separator.length();
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- int pos2=0;
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- if(str_end==null)
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- pos2=str_content.length();
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- if(str_end!=null)
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- pos2=str_content.indexOf(str_end, pos1);
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- return str_content.substring(pos1, pos2);
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- }
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- //连接指定URL,取得股票信息,ConnectNet()控制ReturnStock()
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- public String ConnectNet(String url,String separator,String end,String[] strs_filter)
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- {
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- try{
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- HttpConnection hc = (HttpConnection)Connector.open(url, Connector.READ_WRITE);
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- hc.setRequestMethod(HttpConnection.POST);
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- DataOutputStream dos = hc.openDataOutputStream();
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- DataInputStream dis = new DataInputStream(hc.openInputStream());
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- //-------------------------关键代码:第一步获取整个网页的数据下载回来--------------------------------
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- byte []str=new byte[2000];//从内存申请空间
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- dis.read(str);//把读取返回的信息保存在str中
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- String content= XMLToString(str,strs_filter);//把str转换为字符串
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- //-------------------------关键代码:第二步提取关键的数据--------------------------------
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- content=ReturnStock(content,separator,end,strs_filter);
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-
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- return content;
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- }catch(Exception e){return "出现错误!\n也许是网络连接错误、股票根本不存在或者现在股票休市!";}//出错则返回空字符
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- }
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-
-
-
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- public String XMLToString(byte[] rec,String[] strs_filter) { //从字节读取内容
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- ByteArrayInputStream bais = new ByteArrayInputStream(rec);
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- DataInputStream dis = new DataInputStream(bais);
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- String BTS=null;
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- try {
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- BTS=new String(rec,"UTF-8");
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- bais.close();
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- dis.close();
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- } catch (Exception e) {
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- e.printStackTrace();
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- }
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- if (BTS.indexOf("")>0)//表示不能转换为汉字,则要过滤转换(提高效率)
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- {
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- for(int i=0;i<strs_filter.length;i++)//根据字段,循环把汉字替换为UTF码
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- {
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- BTS=replaceStr(BTS,GBtoUTF(strs_filter[i]),strs_filter[i]);
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- }
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- }
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- return BTS;
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- }
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-
-
- //从一堆XML代码中搜索有用的股票信息
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- //根据strs_filter的元素作为查找字符串的开头
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- //end作为结尾
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- //separator作为分隔头和尾的标志
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- public String ReturnStock(String content,String separator,String end,String[] strs_filter)
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- {
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- String str="",str_fieldname="";
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- for(int i=0;i<strs_filter.length;i++)
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- {
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- int pos1=content.indexOf(strs_filter[i]);
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- int pos2=content.indexOf(separator, pos1+1);
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- int pos3=content.indexOf(end, pos2+1);
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- str_fieldname=content.substring(pos1, pos1+strs_filter[i].length());
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- str=str+"\n"+str_fieldname+content.substring(pos2, pos3);
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- }
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- return str;
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- }
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- //----------------------一下两个函数GBtoUTF,replaceStr配合一起使用---------------------------------
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- //把汉字转化为UTF代码
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- public static String GBtoUTF(String gb2312String) {
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- if (gb2312String == null) {
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- return null;
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- }
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- StringBuffer sb = new StringBuffer(gb2312String.length() * 8);
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-
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- int j = 0;
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- for (int i = 0; i < gb2312String.length(); i++) {
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- j = gb2312String.charAt(i);
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- sb.append("");
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- sb.append(Integer.toHexString(j).toLowerCase());
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- sb.append(";");
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- }
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- return sb.toString();
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- }
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-
-
- //替换字符串函数
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- public static String replaceStr(String str, String OldStr, String replace){
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- for(int i=str.indexOf(OldStr); i>=0; i=str.indexOf(OldStr, i-1))
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- {
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- if(i==0){
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- str = replace+str.substring(i+1, str.length());
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- }
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- else{
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- str = str.substring(0, i)+replace+str.substring(i+1, str.length());
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- }
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- }
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- return str;
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- }
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- //----------------------以上两个函数GBtoUTF,replaceStr配合一起使用---------------------------------
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-
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- //-----------------------------------以上核心代码--------------------------------------------------------
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-
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