1.通过sql直接转换
select CONVERT(GROUP_CONCAT(XXX) USING utf8 from usertable;
2.通过程序转换(注:本例用的是springmvc包装并返回结果集)
String srt2;
try {
srt2 = new String((byte[])entry.getValue(),"UTF-8");
hashmap.put(entry.getKey().toString(), srt2);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}