Month: July 2016

w3c xml 생성 변경 코드

작업중 필요없어져서 삭제하려다가 저장

Xml 이용해서 정보 저장하는코드.  오브젝트 네임을 바꿨는데 이 과정에서 오류가 약간 있을수도..

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;


public class SchoolDao {

	private final Document document;
	private final Node root;
	private final File file;

	public SchoolDao() throws ParserConfigurationException, FileNotFoundException, SAXException, IOException {
		this("conf", "server.xml");
	}
	public SchoolDao(String filePath, String fileName) throws ParserConfigurationException, FileNotFoundException, SAXException, IOException {
		file = new File(filePath, fileName);
		if (file.exists() && file.isFile()) {
			document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new FileInputStream(file));
			root = document.getFirstChild();
		} else {
			document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
			root = document.createElement("root");
			document.appendChild(root);
			new File(filePath).mkdirs();
			file.createNewFile();
		}
	}

	public void addSchool(SchoolObject so) {
		Node school = document.createElement("server");

		addNode(school, "name", so.getName());
		addNode(school, "score", so.getScore());
		
		root.appendChild(school);
	}
	
	private void addNode(Node parent, String nodeName, String nodeContent){
		Node tmpNode;
//		Attr tmpAttr;
		tmpNode = document.createElement(nodeName);
		tmpNode.setTextContent(nodeContent);
//		((Element)tmpNode).setAttributeNode(tmpAttr);
		parent.appendChild(tmpNode);
	}

	public void write() throws TransformerException {
		TransformerFactory transformerFactory = TransformerFactory.newInstance();
		Transformer transformer = transformerFactory.newTransformer();
		DOMSource source = new DOMSource(document);
		StreamResult result = new StreamResult(file);
		transformer.transform(source, result);
		// Output to console for testing
		StreamResult consoleResult = new StreamResult(System.out);
		transformer.transform(source, consoleResult);
	}

	public static void main(String[] args) throws FileNotFoundException, ParserConfigurationException, SAXException,
			IOException, TransformerException {
		SchoolDao dao = new SchoolDao();
		SchoolObject so = new SchoolObject("schoolname");
		so.setScore(100);
		dao.addHost(so);
		dao.write();
	}
}

 

Ubuntu – Crontab – Exec format error

우분투 로그인하니까 you’ve got mail..
또 무슨 오류가?

cat /var/mail/root

........
........
..........
run-parts: failed to exec /etc/cron.hourly/readweb: Exec format error
run-parts: /etc/cron.hourly/readweb exited with return code 1

써있는대로… 실행이 안되서 오류가 났다고 하는건데

readweb 스크립트는 curl을 이용해서 특정 웹페이지를 저장하는 역할을 한다

검색을 해 보니

 

http://askubuntu.com/questions/264607/bash-script-not-executing-from-crontab

원인은 cron에는 path를 잡아주지 않기 때문에 실행명령어를 full path로 적어주거나 path를 따로 잡아줘야함

해결책 :

/usr/bin/curl 처럼 full path로 쓰거나

PATH=/usr/bin

를 잡아줘야하는데…

 

그냥 명령어를 full path로 명시하는게 낫지 않을까

 

BCrypt 암호화 방식

비밀번호 저장에 특화된 암호화로 매 실행시마다 값이 변경된다.

글자수 제한이 있는것이 특징

자세한건 검색으로

테스트코드 첨부

	public static void main(String[] args){
		BCryptPasswordEncoder encoder1 = new BCryptPasswordEncoder();
		String seed1 = "012345678901234567890123456789";
		String result1 = encoder1.encode(seed1);
		System.out.println(result1);
		String seed2 = "01234567890123456789012345678901234567890123456789012345678901234567890";
		String result2 = encoder1.encode(seed2);
		System.out.println(result2);
		String seed3 = "012345678901234567890123456789012345678901234567890123456789012345678901";//최대글자수
		String result3 = encoder1.encode(seed3);
		String seed4 = "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789";
		System.out.println(result3);
		System.out.println();
		System.out.println(encoder1.matches(result1, seed1));
		System.out.println(encoder1.matches(seed1, result1));
		System.out.println(encoder1.matches(seed2, result2));
		System.out.println(encoder1.matches(seed3, result3));
		System.out.println(encoder1.matches(seed4, result3));
}