Java List转字符串逗号隔开且带单引号字符串

写这个方法背景在于,Mybatis传IN参数

1.将List<String>集合 转化为'1','2','3','4','5'

    /**
	 * 将List<String>集合 转化为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. 将"1,2,3,4,5..."这种形式的字符串转成"'1','2','3','4'..."这种形式

    /***
	 * 将"1,2,3,4,5..."这种形式的字符串转成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.将"1,2,3,4,5..."这种形式的字符串转成List<String> 集合

    /**
	 *将"1,2,3,4,5..."这种形式的字符串转成"'1','2','3','4'..."这种形式
	 *
	 *@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 "";

    }

原问地址：https://blog.csdn.net/hqbootstrap1/article/details/81480728