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leosanqingleosanqing
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add Facade 模式
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‎designPattern/.idea/workspace.xml‎

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‎designPattern/maildata.txt‎

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[email protected]=leosanqing
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[email protected]=pipi

‎designPattern/out/production/designPattern/com/leosanqing/facade/Main.class‎

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‎designPattern/out/production/designPattern/com/leosanqing/facade/pagemakeer/Database.class‎

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‎designPattern/out/production/designPattern/com/leosanqing/facade/pagemakeer/HtmlWriter.class‎

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‎designPattern/out/production/designPattern/com/leosanqing/facade/pagemakeer/PageMaker.class‎

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‎designPattern/src/com/leosanqing/facade/Main.java‎

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package com.leosanqing.facade;
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import com.leosanqing.facade.pagemakeer.PageMaker;
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/**
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* @Author: leosanqing
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* @Date: 2019-09-16 22:45
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*/
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public class Main {
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public static void main(String[] args) {
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PageMaker.makeWelcomePage("[email protected]","welcome.html");
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}
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}

‎designPattern/src/com/leosanqing/facade/pagemakeer/Database.java‎

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package com.leosanqing.facade.pagemakeer;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.Properties;
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/**
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* @Author: leosanqing
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* @Date: 2019-09-16 08:18
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* <p>
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* 从邮箱地址中获取用户名的类,在这个例子中我们只是从一个文本中获取，并不是链接数据库
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*/
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public class Database {
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private Database() {
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}
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public static Properties getProperties(String dbname) {
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String filename = dbname + ".txt";
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Properties properties = new Properties();
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try {
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properties.load(new FileInputStream(filename));
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} catch (IOException e) {
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e.printStackTrace();
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}
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return properties;
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}
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}

‎designPattern/src/com/leosanqing/facade/pagemakeer/HtmlWriter.java‎

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package com.leosanqing.facade.pagemakeer;
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import java.io.IOException;
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import java.io.Writer;
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/**
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* @Author: leosanqing
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* @Date: 2019-09-16 08:25
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*/
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public class HtmlWriter {
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private Writer writer;
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public HtmlWriter(Writer writer) {
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this.writer = writer;
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}
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public void title(String title) throws IOException {
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writer.write("<html>");
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writer.write("<head>");
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writer.write("<title>" + title + "</title>");
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writer.write("</head>");
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writer.write("<body>\n");
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writer.write("<h1>" + title + "</h1>\n");
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}
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public void paragraph(String msg) throws IOException {
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writer.write("<p>" + msg + "</p>");
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}
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public void link(String href, String caption) throws IOException {
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paragraph("<a href\"" + href + "\">" + caption + "</a>");
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}
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public void mailto(String mailaddr,String username) throws IOException{
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link("mailto:"+mailaddr,username);
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}
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public void close() throws IOException{
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writer.write("</body>");
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writer.write("</html\n>");
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writer.close();
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}
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}

‎designPattern/src/com/leosanqing/facade/pagemakeer/PageMaker.java‎

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package com.leosanqing.facade.pagemakeer;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.util.Properties;
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/**
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* @Author: leosanqing
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* @Date: 2019-09-16 22:38
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*/
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public class PageMaker {
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private PageMaker() {
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}
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public static void makeWelcomePage(String mailaddr, String filename) {
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try {
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Properties properties = Database.getProperties("maildata");
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String username = properties.getProperty(mailaddr);
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HtmlWriter htmlWriter = new HtmlWriter(new FileWriter(filename));
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htmlWriter.title("Welcome to " + username + "'s page");
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htmlWriter.paragraph(username + "欢迎来到" + username + "的主页");
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htmlWriter.paragraph("等你邮件哦");
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htmlWriter.mailto(mailaddr, username);
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htmlWriter.close();
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System.out.println(filename + " is created for " + mailaddr + " (" + username + " )");
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}

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