集合处理成字符串

private String array2String(Object[] arr){String str = "";if (arr.length <= 0){return str;}StringBuffer strList = new StringBuffer();for (int i = 0; i < arr.length; i++){strList.append("'");strList.append(arr[i]);strList.append("'");strList.append(",");}str = strList.toString().trim();str = str.substring(0, str.lastIndexOf(","));return str;}