s s m框架整合

1.学习java的最基本的也是必经之路。 2.详略得当的总结了每一步过程，必须要会 3.本导图清晰明了的展现所有的步骤和详细的内容

SSM整合

• 1. 需要的依赖
  • 1. 1.资源过滤部分：<build>***</bulid>
    • 资源过滤部分：添加对应的资源过滤器，防止资源无法导出（这是maven的特性，你的文件应该放在maven选择的位置，如果位置有误，则无法被识别） <build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build>
  • 2. 2.Spring部分（2个）：spring-webmvc、spring-jdbc
    • Spring部分：由于这是一个Spring项目，所以我们需要Spring对应的依赖，由于需要使用数据库，所以我们还需要spring-jdbc <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.9.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.9.RELEASE</version> </dependency>
  • 3. 3.SpringMVC部分（3个）：servlet-api、jsp-api、jstl
    • SpringMVC部分：由于我们的框架底只是对Servlet的一个封装，当然还有部分JSP的，我们会使用JSTL表达式来遍历数据 <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency>
  • 4. 4.Mybatis部分（2个）：mybatis、mybatis-spring
    • Myabtis部分：mybatis自身的依赖必不可少，既然是整合，当然还有mybatis-spring <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency>
  • 5. 5.数据库部分（2个）：c3p0、mysql-connector-java
    • 数据库部分：由于设计到数据的变动，我们需要引入mysql-connector-java来连接，由于我使用的是c3p0的数据库连接池，所以需要对应的依赖<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency>
  • 6. 6.代码编写部分（2个）：lombok、junit
    • 其中的lombok需要安装对应的插件才能使用，使用该插件只是在编写实体类时更加灵活，没有其他的用处 <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.8</version> <scope>provided</scope> </dependency> <!--Junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency>
• 2. 创建数据库并连接IDEA
  • 1. CREATE DATABASE `ssmbuild`;
  • 2. CREATE DATABASE `ssmbuild`;
  • 3. 创建一个表 books
    • CREATE TABLE `books` ( `bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id', `bookName` VARCHAR(100) NOT NULL COMMENT '书名', `bookCounts` INT(11) NOT NULL COMMENT '数量', `detail` VARCHAR(200) NOT NULL COMMENT '描述', KEY `bookID` (`bookID`) ) ENGINE=INNODB DEFAULT CHARSET=utf8
  • 4. 在表中插入数据
    • INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES (1,'Java',1,'JAVA编程思想'), (2,'MySQL',10,'MySQL技术内幕:InnoDB存储引擎'), (3,'Linux',5,'Linux就该这么学');
  • 5. 使用IDEA连接我们数据库
    • 
  • 6. 没有数据库驱动的需要先安装数据库驱动
    • 
  • 7. 如果能在IDEA中显示出数据，即为连接成功
    • 
• 3. 配置SpringMVC
  • 1. 配置Tomcat
  • 2. 既然是web项目，那就一定要配置我们的web.xml
    • 1. 对应的前端控制器，以及前端控制器的映射路径（2个）
      • <!--前端控制器--> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
    • 2. 编码过滤器（防止前端出现乱码），以及编码过滤器的映射路径（2个）
      • <!--编码过滤器--> <filter> <filter-name>encodingFilter</filter-name> <filter-class> org.springframework.web.filter.CharacterEncodingFilter </filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
  • 3. spring-mvc.xml
    • 3.1. 开启SpringMVC注解驱动
    • 3.2. 静态资源默认servlet配置
    • 3.3. 扫描web相关的bean
    • 3.4. 配置视图解析器，并以bean的形式放入spring容器中
    • 标注
      • <!-- 1.开启SpringMVC注解驱动 --> <mvc:annotation-driven /> <!-- 2.静态资源默认servlet配置--> <mvc:default-servlet-handler/> <!-- 3.扫描web相关的bean --> <context:component-scan base-package="pers.mobian.controller" /> <!-- 4.配置jsp 显示ViewResolver视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean>
• 4. 配置Mybatis
  • 1. 配置mybatis-config.xml
    • 1.1. 配置实体类的别名
    • 1.2. 绑定我们的mapper文件
    • 标注
      • <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <typeAliases> <package name="pers.mobian.pojo"/> </typeAliases> <mappers> <mapper resource="pers/mobian/dao/BookMapper.xml"/> </mappers> </configuration>
  • 2. 编写对应的数据库配置文件database.properties
    • jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=root
  • 3. 编写spring与mabatis的连接文件，即spring-dao.xml
    • 3.1. 关联数据库文件
    • 3.2. 配置数据库连接池，并将配置好的内容当作bean放入spring容器中
    • 3.3. 将SqlSession的工厂对象注入spring容器中
    • 3.4. 将dao层接口注册spring容器中
    • 标注
      • <?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 https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 1.关联数据库文件 --> <context:property-placeholder location="classpath:database.properties"/> <!-- 2.数据库连接池 --> <!--数据库连接池 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!-- 配置连接池属性 --> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!-- c3p0连接池的私有属性 --> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 关闭连接后不自动commit --> <property name="autoCommitOnClose" value="false"/> <!-- 获取连接超时时间 --> <property name="checkoutTimeout" value="10000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!-- 3.配置SqlSessionFactory对象 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 注入数据库连接池 --> <property name="dataSource" ref="dataSource"/> <!-- 配置MyBaties全局配置文件:mybatis-config.xml --> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!-- 4.配置扫描Dao层的接口包，动态实现Dao接口注入到spring容器中 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 注入sqlSessionFactory --> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 给出需要扫描Dao接口包 --> <property name="basePackage" value="pers.mobian.dao"/> </bean> </beans>
• 5. 配置Service层
  • 1. 我们在service引入事务管理
    • 1.1. 扫描service层的bean
    • 1.2. 将service的接口实现类，注入到bean容器中
    • 1.3. 配置事务管理器，并注入spring容器中
    • 标注
      • <?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"> <!-- 1.扫描service相关的bean --> <context:component-scan base-package="pers.mobian.service" /> <!--2.BookServiceImpl注入到IOC容器中--> <bean id="BookServiceImpl" class="pers.mobian.service.BookServiceImpl"> <property name="bookMapper" ref="bookMapper"/> </bean> <!-- 3.配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 注入数据库连接池 --> <property name="dataSource" ref="dataSource" /> </bean> </beans>
• 6. 配置Spring大容器
  • 这个配置十分简单，只需要将之前配置好的文件，引入到对应的容器中即可
    • <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="spring-dao.xml"/> <import resource="spring-service.xml"/> <import resource="spring-mvc.xml"/> </beans>
• 7. pojo层实体类编写
  • package pers.mobian.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class Books { private int bookID; private String bookName; private int bookCounts; private String detail; }
• 8. dao层的操作数据库
  • 8.1. 接口：BookMapper.java
    • package pers.mobian.dao; import pers.mobian.pojo.Books; import java.util.List; public interface BookMapper { //增加一个Book int addBook(Books book); //根据id删除一个Book int deleteBookById(int id); //更新Book int updateBook(Books books); //根据id查询,返回一个Book Books queryBookById(int id); //查询全部Book,返回list集合 List<Books> queryAllBook(); }
  • 8.2. 实现：BookMapper.xml
    • <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="pers.mobian.dao.BookMapper"> <!--增加一个Book--> <insert id="addBook" parameterType="Books"> insert into ssmbuild.books(bookName,bookCounts,detail) values (#{bookName}, #{bookCounts}, #{detail}) </insert> <!--根据id删除一个Book--> <delete id="deleteBookById" parameterType="int"> delete from ssmbuild.books where bookID=#{bookID} </delete> <!--更新Book--> <update id="updateBook" parameterType="Books"> update ssmbuild.books set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail} where bookID = #{bookID} </update> <!--根据id查询,返回一个Book--> <select id="queryBookById" resultType="Books"> select * from ssmbuild.books where bookID = #{bookID} </select> <!--查询全部Book--> <select id="queryAllBook" resultType="Books"> SELECT * from ssmbuild.books </select> </mapper>
• 9. service层处理对应的逻辑
  • 9.1. 接口：BookService.java
    • package pers.mobian.service; import pers.mobian.pojo.Books; import java.util.List; //BookService:底下需要去实现,调用dao层 public interface BookService { //增加一个Book int addBook(Books book); //根据id删除一个Book int deleteBookById(int id); //更新Book int updateBook(Books books); //根据id查询,返回一个Book Books queryBookById(int id); //查询全部Book,返回list集合 List<Books> queryAllBook(); }
  • 9.2. 实现：BookServiceImpl.java
    • package pers.mobian.service; import pers.mobian.dao.BookMapper; import pers.mobian.pojo.Books; import java.util.List; public class BookServiceImpl implements BookService { //调用dao层的操作，设置一个set接口，方便Spring管理 private BookMapper bookMapper; public void setBookMapper(BookMapper bookMapper) { this.bookMapper = bookMapper; } public int addBook(Books book) { return bookMapper.addBook(book); } public int deleteBookById(int id) { return bookMapper.deleteBookById(id); } public int updateBook(Books books) { return bookMapper.updateBook(books); } public Books queryBookById(int id) { return bookMapper.queryBookById(id); } public List<Books> queryAllBook() { return bookMapper.queryAllBook(); } }
• 10. controller层处理视图
  • package pers.mobian.controller; import pers.mobian.pojo.Books; import pers.mobian.service.BookService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import java.util.List; @Controller @RequestMapping("/book") public class BookController { @Autowired @Qualifier("BookServiceImpl") private BookService bookService; @RequestMapping("/allBook") public String list(Model model) { List<Books> list = bookService.queryAllBook(); model.addAttribute("list", list); return "allBook"; } @RequestMapping("/toAddBook") public String toAddPaper() { return "addBook"; } @RequestMapping("/addBook") public String addPaper(Books books) { System.out.println(books); bookService.addBook(books); return "redirect:/book/allBook"; } @RequestMapping("/toUpdateBook") public String toUpdateBook(Model model, int id) { Books books = bookService.queryBookById(id); System.out.println(books); model.addAttribute("book",books ); return "updateBook"; } @RequestMapping("/updateBook") public String updateBook(Model model, Books book) { System.out.println(book); bookService.updateBook(book); Books books = bookService.queryBookById(book.getBookID()); model.addAttribute("books", books); return "redirect:/book/allBook"; } @RequestMapping("/del/{bookId}") public String deleteBook(@PathVariable("bookId") int id) { bookService.deleteBookById(id); return "redirect:/book/allBook"; } }