package bookshop.util;/** * <p>負責字符串的處理 </p> */import java.lang.*;import java.util.*;public class dataFormat {  public dataFormat() {  }  /**   * 把字符串轉換成適合于網頁顯示的文本   * @param s   * @return   */  public static String toHtml(String s) {     if (s==null) return s;     s=strReplace(s,"&","&amp;");     s=strReplace(s,"<","&lt;");     s=strReplace(s,">","&gt;");     s=strReplace(s,"\"","&quot;");     s=parseReturn(s,"<br>\n&nbsp;&nbsp;&nbsp;&nbsp;");     return s;   }   /**    * 把字符串sBody中的sFrom用sTo替換    * @param sBody    * @param sFrom    * @param sTo    * @return    */   public static String strReplace(String sBody, String sFrom, String sTo) {      int i,j,k,l;      if (sBody==null || sBody.equals("")) return "";      i = 0;      j = sFrom.length();      k = sTo.length();      StringBuffer sss = new StringBuffer(sBody.length());      boolean bFirst=true;      l = i;      while (sBody.indexOf(sFrom,i)!=-1) {        i = sBody.indexOf(sFrom,i);        sss.append(sBody.substring(l,i));        sss.append(sTo);        i += j;        l = i;      }      sss.append(sBody.substring(l));      return sss.toString();    }    /**       * 把字符串中的"\r\n"轉換成"\n"       * @param String sBody  : 要進行替換操作的字符串       * @param String sEndwith : 要替換成為的字符串       */      public static String parseReturn(String sBody, String sEndwith) {        StringTokenizer t = new StringTokenizer(sBody, "\r\n");        StringBuffer sss = new StringBuffer(sBody.length());        boolean bFirst=true;        if (sEndwith.trim().equals("")) sEndwith="\n";        while (t.hasMoreTokens()) {          String s=t.nextToken();          s=s.trim();          while (s.startsWith("　")) s=s.substring(2);          if (!s.equals("")) {             if (bFirst) {              bFirst=false;            } else {              sss.append(sEndwith);            }            sss.append(s);         }        }        return sss.toString();      }      /**          * 將字符串格式化成 HTML 代碼輸出          * 只轉換特殊字符，適合于 HTML 中的表單區域          * @param str 要格式化的字符串          * @return 格式化后的字符串          */         public static String toHtmlInput(String str) {             if (str == null)    return null;             String html = new String(str);             html = strReplace(html, "&", "&amp;");             html = strReplace(html, "<", "&lt;");             html = strReplace(html, ">", "&gt;");             return html;         }      /**     * 將普通字符串格式化成數據庫認可的字符串格式     *     * @param str 要格式化的字符串     * @return 合法的數據庫字符串     */    public static String toSql(String str) {        String sql = new String(str);        return strReplace(sql, "'", "''");    }}