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yrojha4ever / JavaStudOfficial, Main: This is Core/Advance java example series project. It help to learn java step by step using pdf tutorial provided here and corresponding demo project for the eclipse. Tag: Java Student, Java Stud, Stud Java, StudJava, Java Teachers, Studs Quick Start Guide, Studs Java, Object Oriented Programming, Core Java, Java SE, Java EE, Java Enterprise Edition, Java Blog, Java Articles, Java Web, JSP, Servlet, Maven, Spring, Hibernate, Spring-boot, Spring MVC Web, Angular JS, Angular 2, Java Security, Java CRUD, Java Login Example, File Handling, Multi threading, exception handling, Collection classes, Swing, Database, Date Time, Joda Time, JPA.
harismuneer / Flight Booking System JavaServlets App✈️ An MVP level Flight Booking System (web-application) based on the Model View Controller (MVC) Architecture made using Java Servlets, Java Server Pages (JSPs). Moreover authentication and authorization for users is implemented. The web-application is also secured against SQL Injection and Cross-Site Scripting attacks.
libenhe / Hotel无线点餐平台，分为前台客户点餐页面以及后台商家管理页面。MVC开发模式，采用技术有Servlet、JSP、JDBC、C3P0链接池以及MySQL数据库。
rstoyanchev / Spring Mvc ChatSample code using the Spring MVC 3.2, Servlet-based, async support
caijiahao / SpringMvcPlusMongo慕课网 首页 实战 路径 猿问 手记 登录 注册 11.11 Python 手记 \ 史上最全，最详idea搭建springdata+mongoDB+maven+springmvc 史上最全，最详idea搭建springdata+mongoDB+maven+springmvc 原创 2016-10-21 10:54:297759浏览2评论 作为IT届的小弟，本篇作为本人的第一篇手记，还希望各位大牛多多指点，以下均为个人学习所得，如有错误，敬请指正。本着服务IT小白的原则，该手记比较详细。由于最近使用postgre开发大型项目，发现了关系型数据库的弊端及查询效率之慢，苦心钻研之下，对nosql的mongoDB从无知到有了初步了解。 项目环境：win10+IntelliJ IDEA2016+maven3.3.9+MongoDB 3.2+JDK1.7+spring4.1.7 推荐网站（适合学习各种知识的基础）：http://www.runoob.com/ mongo安装请参考http://www.runoob.com/mongodb/mongodb-window-install.html 由于最近osChina的maven仓库挂掉，推荐大家使用阿里的镜像，速度快的飞起 maven配置：<localRepository>F:\.m2\repository</localRepository> <mirrors> <mirror> <id>alimaven</id> <name>aliyun maven</name> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <mirrorOf>central</mirrorOf> </mirror> </mirrors> 这里不实用idea自带maven插件，改用3.3.9 图片描述 项目结构：图片描述 这里dao与mongoDao分别为mongoDB的两种查询方式： dao为JPA的查询方式（请参考springdataJPA） mongoDao使用mongoTemplate，类似于关系型数据库使用的jdbcTemplate 不罗嗦，上代码 先看配置文件 spring-context.xm为最基本的spring配置 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--扫描service包嗲所有使用注解的类型--> <context:component-scan base-package="com.lida.mongo"/> <!-- 导入mongodb的配置文件 --> <import resource="spring-mongo.xml" /> <!-- 开启注解 --> <context:annotation-config /> </beans> spring-web.xml为springmvc的基本配置 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!--配置springmvc--> <!--1.开启springmvc注解模式--> <!--简化配置： (1)主动注册DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter (2)提供一系列功能：数据绑定，数字和日期的format @NumberFormt @DataTimeFormat，xml json默认的读写支持--> <mvc:annotation-driven/> <!--servlet-mapping--> <!--2静态资源默认的servlet配置，（1）允许对静态资源的处理：js，gif （2）允许使用“/”做整体映射--> <!-- 容器默认的DefaultServletHandler处理 所有静态内容与无RequestMapping处理的URL--> <mvc:default-servlet-handler/> <!--3:配置jsp 显示viewResolver--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/WEB-INF/views/"/> <property name="suffix" value=".jsp"/> </bean> <!-- 4自动扫描且只扫描@Controller --> <context:component-scan base-package="com.lida.mongo.controller" /> <!-- 定义无需Controller的url<->view直接映射 --> <mvc:view-controller path="/" view-name="redirect:/goMongo/list"/> </beans> spring-mongo.xml为mongo配置 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mongo="http://www.springframework.org/schema/data/mongo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo.xsd"> <!-- 加载mongodb的属性配置文件 --> <context:property-placeholder location="classpath:mongo.properties" /> <!-- spring连接mongodb数据库的配置 --> <mongo:mongo-client replica-set="${mongo.hostport}" id="mongo"> <mongo:client-options connections-per-host="${mongo.connectionsPerHost}" threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}" connect-timeout="${mongo.connectTimeout}" max-wait-time="${mongo.maxWaitTime}" socket-timeout="${mongo.socketTimeout}"/> </mongo:mongo-client> <!-- mongo的工厂，通过它来取得mongo实例,dbname为mongodb的数据库名，没有的话会自动创建 --> <mongo:db-factory id="mongoDbFactory" dbname="mongoLida" mongo-ref="mongo" /> <!-- 只要使用这个调用相应的方法操作 --> <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"> <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" /> </bean> <!-- mongodb bean的仓库目录，会自动扫描扩展了MongoRepository接口的接口进行注入 --> <mongo:repositories base-package="com.lida.mongo" /> </beans> mongo.properties #mongoDB连接配置 mongo.hostport=127.0.0.1:27017 mongo.connectionsPerHost=8 mongo.threadsAllowedToBlockForConnectionMultiplier=4 #连接超时时间 mongo.connectTimeout=1000 #等待时间 mongo.maxWaitTime=1500 #Socket超时时间 mongo.socketTimeout=1500 pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.liad</groupId> <artifactId>mongo</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>mongo Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <!--使用junit4，注解的方式测试--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!--日志--> <!--日志 slf4j,log4j,logback,common-logging--> <!--slf4j是规范/接口--> <!--log4j,logback,common-logging是日志实现 本项目使用slf4j + logback --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.12</version> </dependency> <!--实现slf4j并整合--> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.1.1</version> </dependency> <!--数据库相关--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.22</version> <!--maven工作范围 驱动在真正工作的时候使用，故生命周期改为runtime--> <scope>runtime</scope> </dependency> <!--servlet web相关--> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.5.4</version> </dependency> <!--spring--> <!--spring核心--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.1.7.RELEASE</version> </dependency> <!--spring dao--> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-mongodb</artifactId> <version>1.8.0.RELEASE</version> </dependency> <dependency> <groupId>org.mongodb</groupId> <artifactId>mongo-java-driver</artifactId> <version>3.2.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>4.1.7.RELEASE</version> </dependency> <!--spring web--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.1.7.RELEASE</version> </dependency> <!--spring test--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>3.2.2</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-framework-bom</artifactId> <version>${spring.version}</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache-core</artifactId> <version>2.6.9</version> </dependency> </dependencies> </dependencyManagement> <build> <finalName>mongo</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> </configuration> </plugin> </plugins> </build> </project> 两个实体类： /** * Created by DuLida on 2016/10/20. */ public class Address { private String city; private String street; private int num; public Address() { } public Address(String city, String street, int num) { this.city = city; this.street = street; this.num = num; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getStreet() { return street; } public void setStreet(String street) { this.street = street; } public int getNum() { return num; } public void setNum(int num) { this.num = num; } @Override public String toString() { return "Address{" + "city='" + city + '\'' + ", street='" + street + '\'' + ", num=" + num + '}'; } } /** * Created by DuLida on 2016/10/20. */ @Document(collection="person") public class Person implements Serializable { @Id private ObjectId id; private String name; private int age; private Address address; public Person() { } public Person( String name, int age, Address address) { this.name = name; this.age = age; this.address = address; } public ObjectId getId() { return id; } public void setId(ObjectId id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Address getAddress() { return address; } public void setAddress(Address address) { this.address = address; } @Override public String toString() { return "Person{" + "id=" + id + ", name='" + name + '\'' + ", age=" + age + ", address=" + address + '}'; } } JPA的dao，注意这里只要继承MongoRepository不用写注解spring就能认识这是个Repository，MongoRepository提供了基本的增删改查，不用实现便可直接调用，例如testMongo的personDao.save(persons); public interface PersonDao extends MongoRepository<Person, ObjectId> { @Query(value = "{'age' : {'$gte' : ?0, '$lte' : ?1}, 'name':?2 }",fields="{ 'name' : 1, 'age' : 1}") List<Person> findByAge(int age1, int age2, String name); } mongoTemplate的dao /** * Created by DuLida on 2016/10/21. */ public interface PersonMongoDao { List<Person> findAll(); void insertPerson(Person user); void removePerson(String userName); void updatePerson(); List<Person> findForRequery(String userName); } @Repository("personMongoImpl") public class PersonMongoImpl implements PersonMongoDao { @Resource private MongoTemplate mongoTemplate; @Override public List<Person> findAll() { return mongoTemplate.findAll(Person.class,"person"); } @Override public void insertPerson(Person person) { mongoTemplate.insert(person,"person"); } @Override public void removePerson(String userName) { mongoTemplate.remove(Query.query(Criteria.where("name").is(userName)),"person"); } @Override public void updatePerson() { mongoTemplate.updateMulti(Query.query(Criteria.where("age").gt(3).lte(5)), Update.update("age",3),"person"); } @Override public List<Person> findForRequery(String userName) { return mongoTemplate.find(Query.query(Criteria.where("name").is(userName)),Person.class); } } JPA查询的测试类： /** * Created by DuLida on 2016/10/20. */ @RunWith(SpringJUnit4ClassRunner.class) //告诉junit spring配置文件 @ContextConfiguration({"classpath:spring/spring-context.xml","classpath:spring/spring-mongo.xml"}) public class PersonDaoTest { @Resource private PersonDao personDao; /*先往数据库中插入10个person*/ @Test public void testMongo() { List<Person> persons = new ArrayList<Person>(); for (int i = 0; i < 10; i++) { persons.add(new Person("name"+i,i,new Address("石家庄","裕华路",i))); } personDao.save(persons); } @Test public void findMongo() { System.out.println(personDao.findByAge(2,8,"name6")); } } mongoTemplate查询的测试类 /** * Created by DuLida on 2016/10/21. */ @RunWith(SpringJUnit4ClassRunner.class) //告诉junit spring配置文件 @ContextConfiguration({"classpath:spring/spring-context.xml","classpath:spring/spring-mongo.xml"}) public class MongoTemplateTest { @Resource private PersonMongoImpl personMongo; @Test public void testMongoTemplate() { //personMongo.insertPerson(new Person("wukong",24,new Address("石家庄","鑫达路",20))); //personMongo.removePerson("name3"); //personMongo.updatePerson(); //System.out.println(personMongo.findAll()); System.out.println(personMongo.findForRequery("wukong")); } } 注意测试前请先通过testMongo()向数据库中插入数据。 项目源码Git地址，仅供学习使用：https://github.com/dreamSmile/mongo.git 参考资料http://docs.spring.io/spring-data/mongodb/docs/current/reference/html/ 本文原创发布于慕课网 ，转载请注明出处，谢谢合作！ 相关标签：JAVAMongoDB 时间丶思考 天才小驴 你好小Song 陈词滥调1 4 人推荐 收藏 相关阅读 JAVA第三季1-9（模拟借书系统）作业 用pkp类，players类，playgame类三步教你写扑克牌游戏 Java入门第三季习题，简易扑克牌游戏 java学习第二季哒哒租车系统 Java入门第二季第六章练习题 请登录后，发表评论 评论（Enter+Ctrl） 全部评论2条 你好小Song2F 多数据源如何配置, 比如多个mongodb数据库再加mysql 1天前回复赞同0 时间丶思考 回复 你好小Song： 41分钟前 就在加一个datasource就行啊，原来mysql的datasource怎么加，现在就怎么加上就行，加上直接用。 回复 你好小Song1F 参考一下, 学习了. 2天前回复赞同0 时间丶思考 JAVA开发工程师 情劫难逃。 3篇手记 3推荐 作者的热门手记 神奇的Canvas贝塞尔曲线画心，程序员的表白 1021浏览18推荐3评论 深入探究setTimeout 和setInterval 44浏览1推荐0评论 网站首页企业合作人才招聘联系我们合作专区关于我们讲师招募常见问题意见反馈友情链接 Copyright © 2016 imooc.com All Rights Reserved | 京ICP备 13046642号-2
Tanh-wink / Educational System教务管理系统javaweb项目 运行环境：window系统，Apache Tomcat v7.0.84、JDK1.8 开发环境：J2EE eclipse、navicat for mysql 运用的技术：MVC设计模式、DAO模式、Servlet、JSP、Filter、MySQL数据库 该项目主要分为登录系统，学生，教师，教务员，系统管理员四大部分，实现了登录，找回密码，修改密码，注销，学生用户的成绩查询，选修与考级报名、学籍信息的查看与修改与考级成绩的查询;教师用户的个人信息查询与修改; 教务员用户的成绩管理，个人信息查询与修改、选修与考级报名学生名单管理员用户对用户的管理。 javaweb的初学者可以下载下来参考学习。下载回来后首先看README.txt文件，帮助理解，启动系统。 系统还有一些功能待实现，可以继续添加完善其他功能与新功能
bobocode-projects / Java Web ExercisesTraining Exercises that cover Networking, HTTP, Servlet API, Spring MVC and Spring Boot
mdtalalwasim / Doctor Patient Portal AdvanceJavaWebProjectDoctor Patient Portal is an Advance Java Project. Technology used in this project: Advance JAVA concepts like JSP, JSTL, Servlet, HTML, CSS, Boostrap 5 and MySQL
chenxiaopan / Supermarketmanager超市账单管理系统 本项目采用jsp+jquery+javabean+servlet+oracle进行MVC开发 1.项目基本分为账单管理、供应商管理、商品管理、用户管理四个模块。 2.采用MVC模式进行开发，前端控制器接收所有的请求，并分别向对应的模块servlet进行转发，由模块servlet进行实际的处理。 3.四个模块完成基本的增、删、改、查功能和分页显示数据。 4.供应商管理、商品管理、用户管理可进行按名称的模糊查询。 5.账单管理可进行按多个条件的查询。 6.订单添加页面使用了ajax进行异步请求，根据选择的商品名称 对应的供应商。并根据提供商和商品名返回唯一的商品信息，利用js进行自动填写。 7.基本的登录验证功能和密码修改功能，并使用js进行友好提示。
jiaoxiangyu / ElectiveManage基于servlet+jsp+mysql+MVC模式的学生选课管理系统
yonyong / Javaweb Project一个功能简单的web项目，项目基于servlet+jsp，数据库为MySQL，前端用bootstrap功能较为简单登录注册，进入主界面对信息增删改查
FengMengZhao / StudentsManagerWeb麻雀虽小，五脏俱全。一个MVC+MySQL+Apache Tomcat的学生管理系统，学会了这系统，你也就学会了JSP、Servlet和数据库的工作原理。
rick2785 / JavaCodeI specifically cover the following topics: Java primitive data types, declaration statements, expression statements, importing class libraries, excepting user input, checking for valid input, catching errors in input, math functions, if statement, relational operators, logical operators, ternary operator, switch statement, and looping. How class variables differ from local variables, Java Exception handling, the difference between run time and checked exceptions, Arrays, and UML Diagrams. Monsters gameboard, Java collection classes, Java ArrayLists, Linked Lists, manipulating Strings and StringBuilders, Polymorphism, Inheritance, Protected, Final, Instanceof, interfaces, abstract classes, abstract methods. You need interfaces and abstract classes because Java doesn't allow you to inherit from more than one other class. Java threads, Regular Expressions, Graphical User Interfaces (GUI) using Java Swing and its components, GUI Event Handling, ChangeListener, JOptionPane, combo boxes, list boxes, JLists, DefaultListModel, using JScrollpane with JList, JSpinner, JTree, Flow, Border, and Box Layout Managers. Created a calculator layout with Java Swing's GridLayout, GridBagLayout, GridBagConstraints, Font, and Insets. JLabel, JTextField, JComboBox, JSpinner, JSlider, JRadioButton, ButtonGroup, JCheckBox, JTextArea, JScrollPane, ChangeListener, pack, create and delete files and directories. How to pull lists of files from directories and manipulate them, write to and read character streams from files. PrintWriter, BufferedWriter, FileWriter, BufferedReader, FileReader, common file exceptions Binary Streams - DataOutputStream, FileOutputStream, BufferedOutputStream, all of the reading and writing primitive type methods, setup Java JDBC in Eclipse, connect to a MySQL database, query it and get the results of a query. JTables, JEditorPane Swing component. HyperlinkEvent and HyperlinkListener. Java JApplet, Java Servlets with Tomcat, GET and POST methods, Java Server Pages, parsing XML with Java, Java XPath, JDOM2 library, and 2D graphics. *Created a Java Paint Application using swing, events, mouse events, Graphics2D, ArrayList *Designed a Java Video Game like Asteroids with collision detection and shooting torpedos which also played sound in a JFrame, and removed items from the screen when they were destroyed. Rotating polygons, and Making Java Executable. Model View Controller (MVC) The Model is the class that contains the data and the methods needed to use the data. The View is the interface. The Controller coordinates interactions between the Model and View. DESIGN PATTERNS: Strategy design patternis used if you need to dynamically change an algorithm used by an object at run time. The pattern also allows you to eliminate code duplication. It separates behavior from super and subclasses. The Observer pattern is a software design pattern in which an object, called the subject (Publisher), maintains a list of its dependents, called observers (Subscribers), and notifies them automatically of any state changes, usually by calling one of their methods. The Factory design pattern is used when you want to define the class of an object at runtime. It also allows you to encapsulate object creation so that you can keep all object creation code in one place The Abstract Factory Design Pattern is like a factory, but everything is encapsulated. The Singleton pattern is used when you want to eliminate the option of instantiating more than one object. (Scrabble letters app) The Builder Design Pattern is used when you want to have many classes help in the creation of an object. By having different classes build the object you can then easily create many different types of objects without being forced to rewrite code. The Builder pattern provides a different way to make complex objects like you'd make using the Abstract Factory design pattern. The Prototype design pattern is used for creating new objects (instances) by cloning (copying) other objects. It allows for the adding of any subclass instance of a known super class at run time. It is used when there are numerous potential classes that you want to only use if needed at runtime. The major benefit of using the Prototype pattern is that it reduces the need for creating potentially unneeded subclasses. Java Reflection is an API and it's used to manipulate classes and everything in a class including fields, methods, constructors, private data, etc. (TestingReflection.java) The Decorator allows you to modify an object dynamically. You would use it when you want the capabilities of inheritance with subclasses, but you need to add functionality at run time. It is more flexible than inheritance. The Decorator Design Pattern simplifies code because you add functionality using many simple classes. Also, rather than rewrite old code you can extend it with new code and that is always good. (Pizza app) The Command design pattern allows you to store a list of commands for later use. With it you can store multiple commands in a class to use over and over. (ElectronicDevice app) The Adapter pattern is used when you want to translate one interface of a class into another interface. Allows 2 incompatible interfaces to work together. It allows the use of the available interface and the target interface. Any class can work together as long as the Adapter solves the issue that all classes must implement every method defined by the shared interface. (EnemyAttacker app) The Facade pattern basically says that you should simplify your methods so that much of what is done is in the background. In technical terms you should decouple the client from the sub components needed to perform an operation. (Bank app) The Bridge Pattern is used to decouple an abstraction from its implementation so that the two can vary independently. Progressively adding functionality while separating out major differences using abstract classes. (EntertainmentDevice app) In a Template Method pattern, you define a method (algorithm) in an abstract class. It contains both abstract methods and non-abstract methods. The subclasses that extend this abstract class then override those methods that don't make sense for them to use in the default way. (Sandwich app) The Iterator pattern provides you with a uniform way to access different collections of Objects. You can also write polymorphic code because you can refer to each collection of objects because they'll implement the same interface. (SongIterator app) The Composite design pattern is used to structure data into its individual parts as well as represent the inner workings of every part of a larger object. The composite pattern also allows you to treat both groups of parts in the same way as you treat the parts polymorphically. You can structure data, or represent the inner working of every part of a whole object individually. (SongComponent app) The flyweight design pattern is used to dramatically increase the speed of your code when you are using many similar objects. To reduce memory usage the flyweight design pattern shares Objects that are the same rather than creating new ones. (FlyWeightTest app) State Pattern allows an object to alter its behavior when its internal state changes. The object will appear to change its class. (ATMState) The Proxy design pattern limits access to just the methods you want made accessible in another class. It can be used for security reasons, because an Object is intensive to create, or is accessed from a remote location. You can think of it as a gate keeper that blocks access to another Object. (TestATMMachine) The Chain of Responsibility pattern has a group of objects that are expected to between them be able to solve a problem. If the first Object can't solve it, it passes the data to the next Object in the chain. (TestCalcChain) The Interpreter pattern is used to convert one representation of data into another. The context cantains the information that will be interpreted. The expression is an abstract class that defines all the methods needed to perform the different conversions. The terminal or concrete expressions provide specific conversions on different types of data. (MeasurementConversion) The Mediator design pattern is used to handle communication between related objects (Colleagues). All communication is handled by a Mediator Object and the Colleagues don't need to know anything about each other to work together. (TestStockMediator) The Memento design pattern provides a way to store previous states of an Object easily. It has 3 main classes: 1) Memento: The basic object that is stored in different states. 2) Originator: Sets and Gets values from the currently targeted Memento. Creates new Mementos and assigns current values to them. 3) Caretaker: Holds an ArrayList that contains all previous versions of the Memento. It can store and retrieve stored Mementos. (TestMemento) The Visitor design pattern allows you to add methods to classes of different types without much altering to those classes. You can make completely different methods depending on the class used with this pattern. (VisitorTest)
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