이야봉 블로그

package xml;

import org.jaxen.XPath;
import org.jaxen.dom.DOMXPath;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;

import javax.xml.parsers.DocumentBuilderFactory;
import java.io.StringReader;
import java.util.List;

public class JaxenMain {
    public static void main(String[] args) throws Exception {
        String xml = "<ROOT><META>메타정보</META><BOOKS><BOOK><AUTHOR>BONG</AUTHOR><TITLE>BONG'S STORY</TITLE></BOOK><BOOK><AUTHOR>HONG</AUTHOR><TITLE>HONG'S STORY</TITLE></BOOK><BOOK><AUTHOR>KIM</AUTHOR><TITLE>KIM'S STORY</TITLE></BOOK></BOOKS></ROOT>";

        XPath xpath = new DOMXPath("/ROOT/META");
        List<Element> elements = xpath.selectNodes(DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new InputSource(new StringReader(xml))).getDocumentElement());

        for (Element element : elements) {
            System.out.println(element.getNodeName());
            System.out.println(element.getTextContent());
        }

       xpath = new DOMXPath("/ROOT/BOOKS/BOOK/AUTHOR");
        elements = xpath.selectNodes(DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new InputSource(new StringReader(xml))).getDocumentElement());

        for (Element element : elements) {
            System.out.println(element.getNodeName());
            System.out.println(element.getTextContent());
        }

        xpath = new DOMXPath("/ROOT/BOOKS/BOOK/TITLE");
        elements = xpath.selectNodes(DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new InputSource(new StringReader(xml))).getDocumentElement());

        for (Element element : elements) {
            System.out.println(element.getNodeName());
            System.out.println(element.getTextContent());
        }
    }
}

[참고]

https://openai.com/blog/chatgpt

A.xml

SELECT *
FROM T_01

SELECT *
FROM T_02

SELECT *
FROM T_03

B.xml

SELECT *
FROM V_01

SELECT *
FROM V_02

SELECT *
FROM V_03

C.xml

INSERT INTO T_01
VALUES ('A');

SELECT *
FROM T_02

SELECT *
FROM V_02

추출과정

1. 위 3개의 파일형식을 XML(3개) => TXT(3개)로 변경

D:\FolderName>ren *.xml *.txt

2. TXT파일(3개) => TXT파일(1개)로 병합(ABC.txt)

  bluefive.pairsite.com/txtcollector.htm

3. ABC.txt(병합 완료)

d:\prac\xmlS\A.xml
************************************************************************
<!-- A.xml -->
SELECT *
FROM T_01

SELECT *
FROM T_02

SELECT *
FROM T_03


d:\prac\xmlS\B.xml
************************************************************************
<!-- B.xml -->

SELECT *
FROM V_01

SELECT *
FROM V_02

SELECT *
FROM V_03


d:\prac\xmlS\C.xml
************************************************************************
<!-- C.xml -->

INSERT INTO T_01
VALUES ('A');

SELECT *
FROM T_02

SELECT *
FROM V_02

Java로 추출작업 수행

4. txt파일을 FileReader로 한 Line씩 추출하여, List1에 담기

5. Line별로 시작단어가 T_ 이거나, V_인 경우를 List2에 담기

6. List2에서 중복제거

추출결과

T_01
T_02
T_03
V_01
V_02
V_03

참조링크

 bluefive.pairsite.com/txtcollector.htm

editorizer.tistory.com/240

jeong-pro.tistory.com/69

www.dante2k.com/444

m.blog.naver.com/pgh7092/221130579329

1. 저글링 클래스

package prac01;

public class Zergling {
	// 필드
	String name;		// 유닛명
	int attackUp;		// 공업 단계(0~3)
	int armorUp;		// 방업 단계(0~3)
	
	// 생성자
	public Zergling(String name, int attackUp, int armorUp) {
		this.name = name;
		this.attackUp = attackUp;
		this.armorUp = armorUp;
	}
	
	@Override
	public String toString() {
		return "Zergling [name=" + name + ", attackUp=" + attackUp + ", armorUp=" + armorUp + "]";
	}
	
}

2.1. HashSet을 이용한 중복제거 실행 클래스

package prac01;

import java.util.HashSet;
import java.util.Set;

public class ZerglingMain {
	public static void main(String[] args) {
		Set<Zergling> set = new HashSet<>();
		
		Zergling z1 = new  Zergling("Zergling", 0, 0);		// 노업 저글링
		Zergling z2 = new  Zergling("Zergling", 0, 0);		// 노업 저글링
		Zergling z3 = new  Zergling("Zergling", 0, 0);		// 노업 저글링
		Zergling z4 = new  Zergling("Zergling", 3, 0);		// 공3업 저글링
		Zergling z5 = new  Zergling("Zergling", 3, 3);		// 풀업 저글링
		Zergling z6 = new  Zergling("Zergling", 3, 3);		// 풀업 저글링
		Zergling z7 = new  Zergling("Zergling", 1, 1);		// 공방1업 저글링
		
		set.add(z1);
		set.add(z2);
		set.add(z3);
		set.add(z4);
		set.add(z5);
		set.add(z6);
		set.add(z7);
		
		System.out.println("set.size(): " + set.size());
		for (Zergling z : set) {
			System.out.println(z.hashCode());
			System.out.println(z);
		}
		
	}
}

2.2. 실행결과

set.size(): 7
2046562095
Zergling [name=Zergling, attackUp=0, armorUp=0]
932172204
Zergling [name=Zergling, attackUp=3, armorUp=3]
1225358173
Zergling [name=Zergling, attackUp=1, armorUp=1]
1342443276
Zergling [name=Zergling, attackUp=0, armorUp=0]
1587487668
Zergling [name=Zergling, attackUp=3, armorUp=0]
1199823423
Zergling [name=Zergling, attackUp=3, armorUp=3]
769287236
Zergling [name=Zergling, attackUp=0, armorUp=0]

※ 중복제거 실패

3.1. 저글링 클래스 보완(hashCode, equals 메소드 재정의)

package prac01;

public class Zergling {
	// 필드
	String name;		// 유닛명
	int attackUp;		// 공업 단계(0~3)
	int armorUp;		// 방업 단계(0~3)
	
	// 생성자
	public Zergling(String name, int attackUp, int armorUp) {
		this.name = name;
		this.attackUp = attackUp;
		this.armorUp = armorUp;
	}
	
	@Override
	public int hashCode() {
		return this.name.hashCode() + this.attackUp + this.armorUp;
	}
	
	@Override
	public boolean equals(Object obj) {
		if (obj instanceof Zergling) {
			Zergling tmp = (Zergling)obj;
			if (this.attackUp == tmp.attackUp && this.armorUp == tmp.armorUp) {
				return true;
			}
		}
		return false;
	}

	@Override
	public String toString() {
		return "Zergling [name=" + name + ", attackUp=" + attackUp + ", armorUp=" + armorUp + "]";
	}
	
}

3.2. 저글링 클래스 보완 후 재실행 결과

set.size(): 4
744866486
Zergling [name=Zergling, attackUp=0, armorUp=0]
744866492
Zergling [name=Zergling, attackUp=3, armorUp=3]
744866489
Zergling [name=Zergling, attackUp=3, armorUp=0]
744866488
Zergling [name=Zergling, attackUp=1, armorUp=1]

※ 중복제거 성공 (공업, 방업 수치가 동일한 저글링은 같은 개체로 취급)

참조
marobiana.tistory.com/100
superfelix.tistory.com/61