建造者模式实例数据拼接 java生成真实XML文件

导出数据的应用框架，通常对于具体的导出内容和格式是有要求的： 分成三部分，文件头、文件体、文件尾 文件头：分公司编号、导出数据的日期，对于文本格式，中间用逗号分离 文件体：表名称，然后分条描述数据。。。。 文件尾：输出人 不管是输出文本文件，还是输出XML文件，步骤基本一致 先拼接文件头的内容 然后拼接文件体的内容 在拼接文件尾的内容 最后把拼接好的内容输出去成为文件

Builder

代码语言：javascript复制

package 建造者模式;

public abstract class Builder {
	protected String id;
	protected String date;
	protected String TableName;
	protected String data;
	protected String Person;
	 
	 
	public Builder(String id, String date, String tableName, String data,String person)
	{
		this.id = id;
		this.date = date;
		TableName = tableName;
		this.data = data;
		Person = person;
	}
	public abstract void BuildHead();
	public abstract void BuildBody();
	public abstract void BuildFoot();
}

TXT

代码语言：javascript复制

package 建造者模式;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class TXT extends Builder {
	public TXT(String id, String date, String tableName, String data,
			String person) {
		super(id, date, tableName, data, person);
	}
private String str="";
	
@Override
public void BuildHead() {
	str =id "," date "rn";
	
}
@Override
public void BuildBody() {
	str =TableName "rn";
	str =data "rn";
	
}
@Override
public void BuildFoot() {
	str =Person "rn";
	
}
public void Result() throws IOException{
	File f1=new File("c:\a.txt");
	FileWriter fw=new FileWriter(f1);
	BufferedWriter bw=new BufferedWriter(fw); 
			bw.write(str);
			bw.close();
 
 
}
}

XML

代码语言：javascript复制

package 建造者模式;

import java.io.File;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.*;

public class XML extends Builder {
	private Document document;
	private Element container;
public XML(String id, String date, String tableName, String data,
			String person) throws ParserConfigurationException 
			{
		super(id, date, tableName, data, person);		
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		DocumentBuilder db = factory.newDocumentBuilder();
		 document = db.newDocument();
	}
 
 
	@Override
	public void BuildHead() {
		document.setXmlStandalone(true);
		container=document.createElement("Conatiner");
		Element head=document.createElement("Head");
		
		Element Id = document.createElement("Id");
		Id.setTextContent(id);
		
		Element Date = document.createElement("Date");
		Date.setTextContent(date);
		head.appendChild(Id);
		head.appendChild(Date);
	container.appendChild(head);
		
		
	}
 
 
	@Override
	public void BuildBody() {
		
		Element Body=document.createElement("body");
		Element tname = document.createElement("TableName");
		tname.setTextContent(TableName);
		
		Element Data = document.createElement("Data");
		Data.setTextContent(data);
		Body.appendChild(Data);
		Body.appendChild(tname);
		container.appendChild(Body);
		
	}
 
 
	@Override
	public void BuildFoot() {
		
		
		Element foot=document.createElement("foot");
		Element per = document.createElement("Person");
		per.setTextContent(Person);
		foot.appendChild(per);
		container.appendChild(foot);
		document.appendChild(container);
	}
	public void Result() throws TransformerException
	{TransformerFactory tff = TransformerFactory.newInstance();
 
	Transformer tf = tff.newTransformer();
	
	tf.setOutputProperty(OutputKeys.INDENT, "yes");
	tf.transform(new DOMSource(document), new StreamResult(new File("g:/shujv.xml")));
	}
}

Director

代码语言：javascript复制

package 建造者模式;

public class Director {

private Builder eb;
 
public Director(Builder eb) {
	
	this.eb = eb;
}
public void Build(){
	eb.BuildHead();
	eb.BuildBody();
	eb.BuildFoot();
}
}

Test

代码语言：javascript复制

package 建造者模式;

import java.io.IOException;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;

public class Test {
public static void main(String args[]) throws IOException, ParserConfigurationException, TransformerException{
	TXT tb=new TXT("001","2020/4/16","数目","20","张三");
		Director dr=new Director(tb);
		dr.Build();
		tb.Result();
		XML ex=new XML("002","2020/4/17","价格","30","李四");
	dr=new Director(ex);
	dr.Build();
	ex.Result();
	}
}

xml

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