서버는 UTF-8형식이고
xml 파일을 되돌려줍니다.

   InputStream is;
    is = openConnectionCheckRedirects(http);
   InputStreamReader tmp = new InputStreamReader(is,"UTF-8");
   BufferedReader reader = new BufferedReader(tmp);
   StringBuilder builder = new StringBuilder();
   String str;
   while((str=reader.readLine())!=null){
    builder.append(str+"\n");
   }
   String myResult = builder.toString();

이런식으로 받으면 결과가  myResult에 이렇게 저장됩니다.

<?xml version="1.0" encoding="UTF-8" ?>
<errors>
   <error key="name">&#51060;&#47492;&#51012; &#51077;&#47141;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796;.</error>
   <error key="password">&#48708;&#48128;&#48264;&#54840;&#47484; &#51077;&#47141;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796;.</error>
   <error key="email">&#51060;&#47700;&#51068;&#51012; &#51077;&#47141;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796;.</error>
   <error key="rrn">&#51452;&#48124;&#46321;&#47197;&#48264;&#54840;&#47484; &#51077;&#47141;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796;.</error>
   <error key="phone">&#51452; &#51204;&#54868;&#48264;&#54840;&#47484; &#51077;&#47141;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796;.</error>
   <error key="join1Agree">&#54924;&#50896;&#51221;&#48372; &#51228;&#44277; &#46041;&#51032; &#50668;&#48512;&#47484; &#49440;&#53469;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796;.</error>
   <error key="passwordChk">&#48708;&#48128;&#48264;&#54840; &#54869;&#51064;&#51012; &#51077;&#47141;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796;.</error>
 </errors>

이걸 한글로 변환시키기 위해

   String myResult2 = new String(myResult.getBytes("EUC-KR"),"UTF-8");
   String myResult3 = new String(myResult.getBytes("UTF-8"),"EUC-KR");
   String myResult4 = new String(myResult.getBytes("UTF-8"),"UTF-8");
   String myResult5 = new String(myResult.getBytes("EUC-KR"),"EUC-KR");

이런 식으로 다해봤지만 다 같은 결과가 나오네요...

네이버나 구글에 저 결과("&#54924;&#50896;&#51221;&#48372; &#51228;&#44277; &#46041;&#51032; &#50668;&#48512;&#47484; &#49440;&#53469;&#54644; &#51452;&#49884;&#44592; &#48148;&#46989;&#45768;&#45796; 이런 것)를 넣으면 한글로 검색이 뜹니다.
뭔가 변환방법이 있는 것은 확실한데, 잘 모르겠어서 난감합니다.

혹시 아시는 분 있으면 도움 부탁드리겠습니다. ㅠㅠ