java-集合做成逗号分隔的字符串-类似mkstring

org.apache.commons.lang.StringUtils.join(nextZoneCodes, ",");

自定义代码：

public static String arrayToString(String[] strs) {
        if(strs.length == 0) {
            return "";
        } else {
            StringBuilder sbuf = new StringBuilder();
            sbuf.append(strs[0]);

            for(int idx = 1; idx < strs.length; ++idx) {
                sbuf.append(",");
                sbuf.append(strs[idx]);
            }

            return sbuf.toString();
        }
    }

public static String arrayToString(String[] strs) {
        if(strs == null || strs.length == 0) {
            return "";
        } else {
            StringBuilder sbuf = new StringBuilder(strs[0]);

            for(int idx = 1; idx < strs.length; ++idx) {
                sbuf.append(",");
                sbuf.append(strs[idx]);
            }

            return sbuf.toString();
        }
    }