Java实现Oracle中Clob类型转换成String类型

/** 
     * oracle.sql.Clob类型转换成String类型 
     *  
     * @param clob 
     * @return 
     */  
	static public String clobToString(Clob clob) throws Exception {
    
      
        if(null == clob || clob.length() == 0){
    
      
            return null;  
        }  
        Reader is = clob.getCharacterStream();  
        // 得到流  
        BufferedReader br = new BufferedReader(is);  
        String str = br.readLine();  
        StringBuffer buffer = new StringBuffer();  
        while (str != null) {
    
      
            buffer.append(str);  
            str = br.readLine();  
        }  
        String reString = buffer.toString();  
        return reString;  
    }  

使用该方法时要在try…catch…中使用抛出异常