Design Pattern - Builder
1. 클래스다이어그램
2. Source
1. 클래스다이어그램
- Builder.java
package com.dazzilove.builder.sample1;
public abstract class Builder {
public abstract void makeTitle(String title);
public abstract void makeString(String str);
public abstract void makeItems(String[] items);
public abstract Object getResult();
} - Director.java
package com.dazzilove.builder.sample1;
public class Director {
private Builder builder;
public Director(Builder builder) {
this.builder = builder;
}
public Object construct() {
builder.makeTitle("Greeting");
builder.makeString("아침과 낮에");
builder.makeItems(new String[] { "좋은 아침입니다.", "안녕하세요." });
builder.makeString("밤에");
builder.makeItems(new String[] { "안녕하세요.", "안녕히 주무세요.", "안녕히 계세요." });
return builder.getResult();
}
} - TextBuilder.java
package com.dazzilove.builder.sample1;
public class TextBuilder extends Builder {
private StringBuffer buffer = new StringBuffer();
@Override
public void makeTitle(String title) {
buffer.append("==============================\n");
buffer.append("『" + title + "』");
buffer.append("\n");
}
@Override
public void makeString(String str) {
buffer.append('■' + " " + str + "\n");
buffer.append("\n");
}
@Override
public void makeItems(String[] items) {
for(int i=0; i<items.length; i++) {
buffer.append("-" + " " + items[i] + "\n");
}
buffer.append("\n");
}
@Override
public Object getResult() {
buffer.append("==============================\n");
return buffer.toString();
}
} - HTMLBuilder.java
package com.dazzilove.builder.sample1;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
public class HTMLBuilder extends Builder {
private String filename;
private PrintWriter writer;
@Override
public void makeTitle(String title) {
filename = title + ".html";
try {
writer = new PrintWriter(new FileWriter(filename));
} catch(IOException e) {
e.printStackTrace();
}
writer.println("<html><head><title>" + title + "</title></head><body>");
writer.println("<h1>" + title + "</h1>");
}
@Override
public void makeString(String str) {
writer.println("<p>" + str + "</p>");
}
@Override
public void makeItems(String[] items) {
writer.println("<ul>");
for(int i=0; i<items.length; i++) {
writer.println("<li>" + items[i] + "</li>");
}
writer.println("</ul>");
}
@Override
public Object getResult() {
writer.println("</body></html>");
writer.close();
return filename;
}
} - Main.java
package com.dazzilove.builder.sample1;
public class Main {
public static void main(String[] args) {
if(args.length != 1) {
usage();
System.exit(0);
}
if("plain".equals(args[0])) {
Director director = new Director(new TextBuilder());
String result = (String) director.construct();
System.out.println(result);
} else if("html".equals(args[0])) {
Director director = new Director(new HTMLBuilder());
String filename = (String) director.construct();
System.out.println(filename + "이 작성되었습니다.");
} else {
usage();
System.exit(0);
}
}
public static void usage() {
System.out.println("Usage : java Main plain 일반텍스트 문서작성");
System.out.println("Usage : java Main html HTML 파일 문서작성");
}
}
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