寫這個方法背景在於,Mybatis傳IN引數

1.將List<String>集合 轉化為'1','2','3','4','5'

	/**
	 * 將List<String>集合 轉化為String
	 * 如{"aaa","bbb"} To 'aaa','bbb'
	 */
	public static String convertListToString(List<String> strlist){
		StringBuffer sb = new StringBuffer();
		if(CollectionUtils.isNotEmpty(strlist)){
			for (int i=0;i<strlist.size();i++) {
				if(i==0){
					sb.append("'").append(strlist.get(i)).append("'");
				}else{
					sb.append(",").append("'").append(strlist.get(i)).append("'");
				}
			}
		}
		return sb.toString();
	}
 

2. 將"1,2,3,4,5..."這種形式的字串轉成"'1','2','3','4'..."這種形式

/***
	 * 將"1,2,3,4,5..."這種形式的字串轉成List<String> 集合
	 * @param strs
	 * @return
	 * */
	
	public static List<String> converStringToList(String strs) {
		if (StringUtils.isNotBlank(strs)) {
			String[] idStrs = strs.trim().split(",");
			if (null != idStrs && idStrs.length > 0) {
				List<String> strsList = new ArrayList<String>();
				for (String str : idStrs) {
					if (StringUtils.isNotBlank(str)) {
						strsList.add(str.trim());
					}
				}
				if (strsList.size() > 0) {
					return strsList;
				}
			}
		}
		return null;
	}
 

3.將"1,2,3,4,5..."這種形式的字串轉成List<String> 集合

/**
	 將"1,2,3,4,5..."這種形式的字串轉成"'1','2','3','4'..."這種形式
	 
	 @param strs
	 @return
	 */
	public static String converString(String strs) {
		if (StringUtils.isNotBlank(strs)) {
			String[] idStrs = strs.trim().split(",");
			if (null != idStrs && idStrs.length > 0) {
				StringBuffer sbf = new StringBuffer("");
				for (String str : idStrs) {
					if (StringUtils.isNotBlank(str)) {
						sbf.append("'").append(str.trim()).append("'").append(",");
					}
				}
				if (sbf.length() > 0) {
					sbf = sbf.deleteCharAt(sbf.length() - 1);
					return sbf.toString();
				}
			}
		}
		return "";
	}