1. java 다운로드 https://jdk.java.net/archive/ Archived OpenJDK GA Releases Archived OpenJDK General-Availability Releases This page is an archive of previously released builds of the JDK licensed under the GNU General Public License, version 2, with Classpath Exception. WARNING: These older versions of the JDK are provided to he jdk.java.net 위의 링크에 들어가셔서 자신의 os에 맞는 자바를 다운로드하여 압축을 풀어줍니다. 아래 설치의 경우 w..

1. 자바 BASE64 인코드 public static String base64Encode(String param) { String encodedString = null; if(param == null || param == "") { return encodedString; } try { byte[] blobBytes = param.getBytes("UTF-8"); encodedString = Base64.getEncoder().encodeToString(blobBytes); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } return encodedString; } 2. 자바..