clob转换成String

川长思鸟来 2022-05-28 08:46 225阅读 0赞

方法一：  
  
  public final static String clob2String(CLOB clob)  
  \{  
    if (clob ==null )  
    \{  
      return ;  
    \}  
     
    StringBuffer sb = new StringBuffer(65535);//64K  
    Reader clobStream = null;  
    try  
    \{  
      clobStream = clob.getCharacterStream();  
      char\[\] b = new char\[60000\];//每次获取60K  
      int i = 0;  
      while((i = clobStream.read(b)) != -1)  
      \{  
        sb.append(b,0,i);  
      \}  
    \}  
    catch(Exception ex)  
    \{  
      sb = null;  
    \}  
    finally  
    \{  
      try  
      \{  
        if (clobStream != null)  
          clobStream.close();  
      \}  
      catch (Exception e)  
      \{  
      \}  
    \}  
    if (sb == null)  
      return ;  
    else  
      return sb.toString();  
  \}

方法二：  
     
  public   static   String   clob2string(Clob   c)      
  \{      
  StringBuffer   sb   =   new   StringBuffer(1024);    
  Reader   instream   =   null;    
  try\{    
  instream   =   c.getCharacterStream();    
  char\[\]   buffer   =   new   char\[(int)c.length()\];    
  int   length   =   0;    
  while   ((length   =   instream.read(buffer))   !=   -1)\{    
  sb.append(buffer);    
  \}    
  \}    
  catch(Exception   ex)\{    
  ex.printStackTrace();    
  \}    
  finally\{    
  try\{    
  if(instream   !=   null)   instream.close();    
  \}    
  catch(Exception   dx)\{    
  instream   =   null;    
  \}    
  return   sb.toString();    
  \}    
  \}    
 方法三：  
  
    public String getText(String s)  
        throws SQLException  
    \{  
        String s1 = "";  
        char ac\[\] = new char\[200\];  
        CLOB clob = (CLOB)result.getObject(s);  
        if(clob == null)  
            return null;  
        Reader reader = clob.getCharacterStream();  
        int i;  
        try  
        \{  
            while((i = reader.read(ac, 0, 200)) != -1)