dataformat.java

这是一个网上产品销售系统

package cdshop.util;
/**
 * <p>负责字符串的处理 </p>*/
import java.lang.*;
import java.util.*;
public class dataFormat {
  public dataFormat() {  }
  /**
   * 把字符串转换成适合于网页显示的文本
   * @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替换
    * @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"转换成"\n"

       * @param String sBody  : 要进行替换操作的字符串

       * @param String sEndwith : 要替换成为的字符串

       */


      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();

      }

      /**
          * 将字符串格式化成 HTML 代码输出

          * 只转换特殊字符，适合于 HTML 中的表单区域

          * @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;
         }

      /**

     * 将普通字符串格式化成数据库认可的字符串格式

     *
     * @param str 要格式化的字符串

     * @return 合法的数据库字符串
     */

    public static String toSql(String str) {

        String sql = new String(str);

        return strReplace(sql, "'", "''");

    }

    /**
     * 把字符串转换成GBK编码

     * @param uniStr
     * @return
     */

    public static String toGb(String uniStr){

      String gbStr = "";

      if(uniStr == null){

        uniStr = "";

      }

      try{

        byte[] tempByte = uniStr.getBytes("ISO8859_1");

        gbStr = new String(tempByte,"GB2312");

      }

      catch(Exception ex){

        System.out.println(ex.toString());

      }

      return gbStr;

    }

    /**
     * 把字符串转换成uincode编码

     * @param gbStr
     * @return
     */

public static String toUni(String gbStr){

      String uniStr = "";

      if(gbStr == null){

        gbStr = "";

      }

      try{

        byte[] tempByte = gbStr.getBytes("GB2312");

        uniStr = new String(tempByte,"ISO8859_1");

      }catch(Exception ex){

      }
      return uniStr;

    }

public static String toString(String gbStr){
          return gbStr;
        }

}