Tutorial MySQL com Java
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This document provides an extensive tutorial on using MySQL with Java, including installation steps, JDBC connection procedures, and best practices for application architecture. It covers various MySQL functionalities, tools, and the importance of proper classpath configurations. Additionally, it addresses common errors users may encounter and outlines resources for further learning and training in MySQL.
![HelloMysql.java 1/2
import java.sql.*;
public class HelloMysql {
public static void main(String args[]){
System.out.println("Tentando conectar ao MySQL...");
try {
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/mysql";
String usuario = "root";
String senha = "root";
Connection con = DriverManager.getConnection(url, usuario, senha);
System.out.println("URL: " + url);
System.out.println("Connection: " + con);
Continua…](https://image.slidesharecdn.com/tutorialmysqljavaout2012-121008173430-phpapp01/85/Tutorial-MySQL-com-Java-31-320.jpg)
![No Suitable Driver
• SQLException: No suitable driver
• Check your URL, compare to the documentation at
http://dev.mysql.com/doc/refman/5.1/en/connector-j.html
• Your URL should look something like
jdbc:mysql://host:port/database[...]
67](https://image.slidesharecdn.com/tutorialmysqljavaout2012-121008173430-phpapp01/85/Tutorial-MySQL-com-Java-51-320.jpg)
Tutorial MySQL com Java
- 1. <Insert Picture Here> Tutorial MySQL com Java Airton Lastori [email protected] 08-out-2012
- 2. Alguns clientes MySQL Web & Enterprise OEM & ISVs Cloud 2
- 3. Várias Indústrias mysql.com/customers 3
- 4. Quando usar MySQL? 4
- 5. Resumo: onde o MySQL se encaixa • Novas aplicações e aplicações customizadas Ad-hoc • principalmente arquitetura Web (ex. Linux+Apache+MySQL+Java) • arquiteturas inovadoras, NoSQL (versão 5.6 e Cluster 7.2) • Aplicações híbridas • expansão de sistemas legados • MySQL como front-end e Oracle DB como back-end • Online e SaaS • E-commerce/OLTP e pagamentos digitais • Gerenciamento de Conteúdo (CMS) • Redes Sociais, mensagens e colaboração • Games Sociais e MMO • Gerenciamento de Sessão e Autenticação do usuário • Datamarts e Relatórios Departamentais • SMS, e-marketing, Infra Telecom, Infra TI • Embarcadas 5
- 6. MySQL em Aplicações Enterprise Aplicações Corporativas de Missão Crítica Importancia/Complexidade Finanças Globais, ERP, SCM, CRM, HR Aplicações Críticas para o Negócio Impacto no negócio, Interdepartamentais Aplicações Operacionais De suporte, Departamentais Corporativo Departamental 6
- 7. Quando custa o MySQL? 7
- 8. Portfolio Open Source (GPL) • MySQL Database (Community Server) 5.5.27 GA e 5.6.6 DMR • MySQL Cluster (NDB Community) 7.2.7 GA • MySQL Workbench Community Edition 5.2.40 GA • MySQL Utilities (em Python) • MySQL Connectors • ODBC, Java, .Net, C, C++, PHP, OpenOffice • MySQL Proxy 0.8.2 Alpha • Documentação: livre para uso, não coberto pela GPL • Forums dev.mysql.com/downloads 8
- 9. MySQL Enterprise Edition. Indicado para empresas ou pessoas físicas que pretendem aumentar produtividade, diminuir riscos e explorar mais a fundo e aumentar as capacidades do MySQL. Oracle Premier Lifetime Support MySQL Enterprise Oracle Product Security Certifications/Integrations MySQL Enterprise MySQL Enterprise Audit Monitor/Query Analyzer MySQL Enterprise MySQL Enterprise Scalability Backup MySQL Enterprise MySQL Workbench High Availability
- 11. MySQL Database Performance, Confiabilidade, Facilidade de Uso Gerenciamento Suporte às mais eficiente e multi- conhecidas thread de sessões plataformas/linguagens de desenvolvimento Parsing completo DML+DDL, otimizador, baseado em custo, caching de queries e resultados Várias opções de Storage Engine para necessidades específicas das aplicações Opções flexíveis de logging e armazenamento físico
- 12. InnoDB no MySQL - Storage Engine mais utilizado - aplicações Web 2.0 - aplicações de varejo - aplicações de entretenimento & mídia - ACID, transacional - Crash recovery - Integridade referencial - Suporta altos níveis de usuários concorrentes - No MySQL versão 5.5 - padrão - otimizado para hardware multi-core, multi-thread e SOs
- 13. Como instalar o MySQL?
- 14. MySQL Installer for Windows • Interface gráfica nativa do Windows • Todos produtos MySQL para desenvolvimento em UM único pacote • MySQL Database • MySQL Connectors • MySQL Workbench e exemplos de modelos • Exemplos de bancos de dados • Documentação • Alta integração de produtos, download sob demanda, funcionalidades de atualização
- 15. MySQL Installer for Windows Selecione Atualize Configure mysql.com/downloads
- 17. No Linux ou Mac, prefira os binários mysql.com/downloads/mysql
- 18. Tutorial MySQL em 10 minutos slideshare.net/MySQLBR/mysql-em-10min-alexandre-almeida-hti-tecnologia
- 19. No Linux ou Mac, instale também o Connector/J mysql.com/downloads/connector/j
- 20. Teste via MySQL Workbench 1/2
- 21. Teste via MySQL Workbench 2/2
- 22. Teste via MySQL Client (opcional) C:Program FilesMySQLMySQL Server 5.5bin>mysql -uroot -p Enter password: **** Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 8 Server version: 5.5.28 MySQL Community Server (GPL) Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. mysql>
- 23. Administre via MySQL Workbench 1/3
- 24. Administre via MySQL Workbench 2/3
- 25. Administre via MySQL Workbench 3/3
- 26. Parar ou Iniciar o servidor MySQL (opcional) Ou via MySQL Notifier
- 27. Tudo certo com seu ambiente Java? 1/2 Instalar e configurar JDK e path oracle.com/technetwork/java/javase/downloads
- 28. Tudo certo com seu ambiente Java? 2/2 JDK e path configurados C:Program FilesMySQLMySQL Server 5.5bin>java -version java version "1.7.0_07" Java(TM) SE Runtime Environment (build 1.7.0_07-b11) Java HotSpot(TM) 64-Bit Server VM (build 23.3-b01, mixed mode) C:Program FilesMySQLMySQL Server 5.5bin>javac Usage: javac <options> <source files> where possible options include: -g Generate all debugging info -g:none Generate no debugging info -g:{lines,vars,source} Generate only some debugging inf ...o
- 30. Adicione o driver MySQL ao CLASSPATH caminho completo do .jar Confira: C:>set CLASSPATH CLASSPATH=.;C:Program Files (x86)Javajre6libextQTJava.zip;C:Program Files MySQLmysql-connector-java-5.1.22mysql-connector-java-5.1.22-bin.jar
- 31. HelloMysql.java 1/2 import java.sql.*; public class HelloMysql { public static void main(String args[]){ System.out.println("Tentando conectar ao MySQL..."); try { Class.forName("com.mysql.jdbc.Driver"); String url = "jdbc:mysql://localhost:3306/mysql"; String usuario = "root"; String senha = "root"; Connection con = DriverManager.getConnection(url, usuario, senha); System.out.println("URL: " + url); System.out.println("Connection: " + con); Continua…
- 32. HelloMysql.java 2/2 Statement stmt = con.createStatement(); //objeto Statement ResultSet rs; //objeto ResultSet rs = stmt.executeQuery("SELECT * FROM world.country"); System.out.println("Ola mundo!"); while(rs.next()){ String nomePais = rs.getString("Name"); System.out.print(nomePais + ", "); }//end while con.close(); } catch( Exception e ) { e.printStackTrace(); }//end catch }//end main }//end class HelloMysql FIM!
- 33. java HelloMysql C:tutorial>javac HelloMysql.java C:tutorial>java HelloMysql Tentando conectar ao MySQL... URL: jdbc:mysql://localhost:3306/mysql Connection: com.mysql.jdbc.JDBC4Connection@ed07f45 Ola mundo! Aruba, Afghanistan, Angola, Anguilla, Albania, Andorra, Netherlands Antilles, Un ited Arab Emirates, Argentina, Armenia, American Samoa, Antarctica, French South ern territories, Antigua and Barbuda, Australia, Austria, Azerbaijan, Burundi, B elgium, Benin, Burkina Faso, Bangladesh, Bulgaria, Bahrain, Bahamas, Bosnia and Herzegovina, Belarus, Belize, Bermuda, Bolivia, Brazil, Barbados, Brunei, Bhutan , Bouvet Island, Botswana, Central African Republic, Canada, Cocos (Keeling) Isl ands, Switzerland, Chile, China, C├┤te d┬ÆIvoire, Cameroon, Congo, The Democrati c Republic of the, Congo, Cook Islands, Colombia, Comoros, Cape Verde, Costa Ric a, Cuba, Christmas Island, Cayman Islands, Cyprus, Czech Republic, Germany, Djib … ietnam, Vanuatu, Wallis and Futuna, Samoa, Yemen, Yugoslavia, South Africa, Zamb ia, Zimbabwe,
- 34. Revisão: Conceitos importantes • Como conectar o Java ao MySQL • Entender o CLASSPATH 34
- 35. Revisão: conectando o Java ao MySQL • O driver JDBC é chamado MySQL Connector/J • Desenvolvido pela Oracle sob licença GPL • Driver Type IV (todo java, nativo) • Disponível para baixar em: • Software • dev.mysql.com/downloads/connector/j • Maven, Ivy • Many Linux and BSD distributions • Documentation • dev.mysql.com/doc/refman/5.5/en/connector-j.html 35
- 36. Revisão: Entendendo o CLASPATH • O classpath é o local onde o Java procura por código compilado (biblioteca) • Há locais padrão para o classpath • WEB-INF/lib, WEB-INF/classes in webapps • $JRE_HOME/lib/ext • Quando estiver desenvolvendo ou implantando evite estes locais • $JRE_HOME/lib/ext • Application-server-wide • e.g. $CATALINA_HOME/lib • Se possível deixe este trabalho para sua IDE 36
- 37. Crie um usuário no MySQL. 37
- 38. Criando usuário public User createUser(Connection c, String } catch (SQLException sqlEx) { login, String firstName, String lastName, String // handle it, it's not a concern outside credentials) { of persistence PreparedStatement p = null; } finally { try { try { p = c.prepareStatement("INSERT if (p != null) { p.close(); }; INTO user (login, first_name, last_name, passwd_hash) VALUES (?, ?, ?, ?)"); } catch (SQLException sqlEx) { p.setString(1, login); // can't do anything here, log? p.setString(2, firstName); } ResultSet rs = } p.getGeneratedKeys(); } rs.next(); long id = rs.getLong(1); PersistentUser user = new PersistentUser(); Estes tipos de user.setId(id); acesso é conhecido return user; como Raw JDBC… 38
- 39. Arquitetando para o sucesso com MySQL! Applications start small If they’re successful, they don’t stay that way
- 40. Arquitetando para o Sucesso Um Anti-Pattern Presentation Presentation Presentation Presentation Presentation Presentation Presentation Presentation Presentation BusinessLogic Presentation Presentation Presentation BusinessLogic BusinessLogic Presentation Presentation BusinessLogic BusinessLogic BusinessLogic BusinessLogic BusinessLogicBusinessLogic Persistence BusinessLogic Persistence Persistence BusinessLogic Persistence BusinessLogic BusinessLogic Persistence BusinessLogic BusinessLogic Persistence Persistence Persistence Persistence BusinessLogic Persistence Persistence Persistence Persistence Persistence Persistence Persistence Persistence Persistence 40
- 41. Arquitetando para o Sucesso Um Anti-Pattern Quero usar uma lógica daqui… Presentation Presentation Presentation Presentation Presentation Presentation Presentation Presentation Presentation …aplicar aqui… BusinessLogic Presentation Presentation Presentation BusinessLogic BusinessLogic Presentation Presentation BusinessLogic BusinessLogic BusinessLogic BusinessLogic BusinessLogicBusinessLogic Persistence …no contexto BusinessLogic Persistence Persistence BusinessLogic Persistence desta BusinessLogic BusinessLogic Persistence BusinessLogic BusinessLogic Persistence trasação. Persistence Persistence Persistence BusinessLogic Persistence Persistence Persistence Persistence Persistence Persistence Persistence Persistence Persistence 41
- 42. Arquitetando para o Sucesso Comece limpo Presentation Business Logic Persistence 42
- 43. Arquitetando para o Sucesso Comece limpo Presentation Transactions Business Logic Persistence 43
- 44. Arquitetando para o Sucesso Comece limpo Presentation Transactions Business Logic Caching Persistence 44
- 45. Arquitetando para o Sucesso Comece limpo Presentation } Test this Transactions Business Logic } Test this Caching Persistence } Test this 45
- 46. Arquitetando para o Sucesso Use ferramentas adequadas • Using Maven to manage the depedencies/build • Using SpringFramework • Dependency Injection • Templates/Boilerplate/Integration • Uma boa IDE: NetBeans, Eclipse 46
- 47. Arquitetura em Camadas Exemplo Criar Usuário @Override public User createUser(String login, String firstName, String lastName, String credentials) { jdbcTemplate.update("INSERT INTO user (login, first_name, last_name, passwd_hash) VALUES (?, ?, ?, ?)", login, firstName, lastName, credentials); long id = jdbcTemplate.queryForLong("SELECT LAST_INSERT_ID()"); PersistentUser user = new PersistentUser(); user.setId(id); user.setLogin(login); user.setFirstName(firstName); user.setLastName(lastName); user.setCredentials(credentials); return user; } 47
- 48. Como era no Raw JDBC public User createUser(Connection c, String } catch (SQLException sqlEx) { login, String firstName, String lastName, String // handle it, it's not a concern outside credentials) { of persistence PreparedStatement p = null; } finally { try { try { p = c.prepareStatement("INSERT if (p != null) { p.close(); }; INTO user (login, first_name, last_name, passwd_hash) VALUES (?, ?, ?, ?)"); } catch (SQLException sqlEx) { p.setString(1, login); // can't do anything here, log? p.setString(2, firstName); } ResultSet rs = } p.getGeneratedKeys(); } rs.next(); long id = rs.getLong(1); PersistentUser user = new PersistentUser(); Estes tipos de user.setId(id); acesso é conhecido return user; como Raw JDBC… 48
- 49. Resolvendo erros comuns com MySQL! 65
- 50. Class not found • java.lang.ClassNotFoundException: com.mysql.jdbc.Driver • The driver is not in your CLASSPATH • Standalone applications with framework-managed CLASSPATH help with this, i.e WEB-INF/lib, or mvn or ant- managed CLASSPATH 66
- 51. No Suitable Driver • SQLException: No suitable driver • Check your URL, compare to the documentation at http://dev.mysql.com/doc/refman/5.1/en/connector-j.html • Your URL should look something like jdbc:mysql://host:port/database[...] 67
- 52. Out of Memory • java.lang.OutOfMemoryError when reading results • Your result set is too large, Connector/J buffers results by default • Most use cases don’t require large result sets • Those that do, process in chunks via SELECT ... LIMIT, or Statement.setFetchSize(Integer.MIN_VALUE) • Heap dump shows many statement, result set instances • Not closing resources on every code path • Frameworks help prevent this • Plumb try {} catch {} finally {} throughout your code (yuck!) 68
- 53. Communications Exceptions • "The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server." • Your server was started with --skip-networking or --bind- address=127.0.0.1 and your client is remote to the server • “The last packet successfully received from the server was 25899 milliseconds ago.The last packet sent successfully to the server was 25899 milliseconds ago, which is longer than the server configured value of 'wait_timeout'” • Connections are sitting idle too long in your pool • Configure your pool to evict idle connections before wait_timeout would expire • Don’t let connections idle much more than the amount of time it takes to create a new one under worst-case 69
- 54. Devo migrar para MySQL? 70
- 55. MySQL Migration Tool Novo! • Wizard para migração de tabelas e dados: • MS-SQL Server 2000, 2005, 2008 e 2012. • SGBDs em geral via ODBC • Mapeamento personalizado (opcional) • Integrado ao Workbench open source e gratuito Download: mysql.com/downloads Documentação: dev.mysql.com/doc/workbench/en/wb-migration.html 71
- 56. 72
- 57. Próximos passos com MySQL 73
- 58. Referências • Use MySQL with Java http://dev.mysql.com/usingmysql/java/ • Read Connector/J User Manual http://dev.mysql.com/doc/refman/5.5/en/connector-j.html • Download MySQL 5.5 http://www.mysql.com/downloads/mysql/ • Download Free MySQL White Papers http://dev.mysql.com/why-mysql/white-papers/ • View MySQL Training Courses http://mysql.com/training 74
- 59. MySQL Treinamento e Certificação Treinamentos MySQL DBA MySQLDeveloper Certificações MySQL Boot Camp MySQL Boot Camp Accelerated Accelerated MySQL Performance MySQL Performance Tuning Boot Camp Tuning Boot Camp Accelerated Accelerated MySQL for Begginers MySQL for Begginers MySQL for Database MySQL and PHP Administrators Developing Dynamic Web Applicationg MySQL Performance Tuning MySQL for Developers MySQL High MySQL Advanced Availability Stored Procedures MySQL Cluster Opcional Necessário education.oracle.com 75
- 60. Obrigado! @MySQLBR facebook.com/MySQLBR meetup.com/MySQL-BR 76