Elastic Stack从入门到实践

download:Elastic Stack从入门到实践

本科带你掌握Elastic Stack的组成及原理应用，详解Elasticsearch、Kibana、Beats及Logstash 的原理与应用技巧，助你快速收集、处理和分析数据，以达成助力业务增长的目标！

适合人群及技术储备要求
只要你对大数据处理或数据分析感兴趣，就欢迎你的加入！学习过程中跟随老师的步伐，注重原理本质的挖掘、多动手，重视培养思维方式，做到举一反三，方可达到入门后能自主解决实际中遇到的问题。

技术储备要求：
有一定编程基础（语言不限）、数据库、Linux使用经验，学习会更快更易上手
public Book() {
}

public Book(String id, String name, String price, String auth,        String publish, String description) {    super();    this.id = id;    this.name = name;    this.price = price;    this.auth = auth;    this.publish = publish;    this.description = description;}public String getDescription() {    return description;}public void setDescription(String description) {    this.description = description;}public String getId() {    return id;}public void setId(String id) {    this.id = id;}public String getName() {    return name;}public void setName(String name) {    this.name = name;}public String getPrice() {    return price;}public void setPrice(String price) {    this.price = price;}public String getAuth() {    return auth;}public void setAuth(String auth) {    this.auth = auth;}public String getPublish() {    return publish;}public void setPublish(String publish) {    this.publish = publish;}

}

import java.util.LinkedHashMap;
import java.util.Map;
import cn.huiyu.ben.Book;
public class BookDao {
private static Map<String,Book> bookMap = new LinkedHashMap<String, Book>();
private BookDao() {
}
static{
bookMap.put("1", new Book("1","1111","11.0","zqwang","111出版社","111111111"));
bookMap.put("2", new Book("2","2222","22.0","zqwang","222出版社","222222222"));
bookMap.put("3", new Book("3","3333","33.0","zqwang","333出版社","333333333"));
}

public static Map<String,Book> getBooks(){    return bookMap;}public static Book getBook(String id){    return bookMap.get(id);}

}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
//1.查询数据库中一切的书展现
Map<String,Book> map = BookDao.getBooks();
for(Map.Entry<String , Book> entry : map.entrySet()){
Book book = entry.getValue();
response.getWriter().write("<a href='"+request.getContextPath()+"/servlet/BookInfoServlet?id="+book.getId()+"'>"+book.getName()+"
");
}
response.getWriter().write("
");

    //2.显现之前看过的书    Cookie [] cs = request.getCookies();    Cookie findC = null;    if(cs!=null){        for(Cookie c : cs){            if("last".equals(c.getName())){                findC = c;            }        }    }    if(findC == null){        response.getWriter().write("没有看过任何书!");    }else{        response.getWriter().write("您曾经阅读过的书:

");
String[] ids = findC.getValue().split(",");
for(String id : ids){
Book book = BookDao.getBook(id);
response.getWriter().write(book.getName()+"
");
}
}
}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
//1.获取要看的书的id,查询数据库找出书,输出书的细致信息
String id = request.getParameter("id");
Book book = BookDao.getBook(id);
if(book==null){
response.getWriter().write("找不到这本书!");
return;
}else{
response.getWriter().write("
书名:"
+book.getName()+"");
response.getWriter().write("
作者:"
+book.getAuth()+"");
response.getWriter().write("
售价:"
+book.getPrice()+"");
response.getWriter().write("
出版社:"
+book.getPublish()+"");
response.getWriter().write("
描画信息:"
+book.getDescription()+"");
}

    //2.发送cookie保管最后看过的书    // --- 1 --> 1    // 1 --2,1 --> 2,1    // 2,1--3,2,1 --> 3,2,1    // 3,2,1 -- 4,3,2 --> 4,3,2    // 4,3,2 --3,4,2 --> 3,4,2    String ids = "";    Cookie [] cs = request.getCookies();    Cookie findC = null;    if(cs!=null){        for(Cookie c : cs){            if("last".equals(c.getName())){                findC = c;            }        }    }    if(findC == null){        //阐明之前没有看过书的记载        ids += book.getId();    }else{        //阐明之前有历史看过的书的记载,需求依据历史记载算一个新的记载出来        String [] olds = findC.getValue().split(",");        StringBuffer buffer = new StringBuffer();        buffer.append(book.getId()+",");        for(int i = 0;i<olds.length && buffer.toString().split(",").length<3 ;i++){            String old = olds[i];            if(!old.equals(book.getId())){                buffer.append(old+",");            }        }        ids = buffer.substring(0, buffer.length()-1);    }    Cookie lastC = new Cookie("last",ids);    lastC.setMaxAge(3600*24*30);    lastC.setPath(request.getContextPath());    response.addCookie(lastC);}

download:Elastic Stack从入门到实践

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