SSM框架整合
1、建立简单的maven项目
2、导入依赖
<?xml version="1.0" encoding="UTF-8"?> <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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>SSM</artifactId> <version>1.0-SNAPSHOT</version> <!--导入依赖 Junit 数据库驱动 连接池 servlet jsp mybatis mybatis-spring spring --> <dependencies> <!--junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!--数据库驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>6.0.6</version> </dependency> <!--数据库连接池--> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!--Servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <!--jsp--> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!--mybatis--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <!--mybatis-spring--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <!--spring--> <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> <!----> </dependencies> <!--静态资源导出问题--> <!--在build中配置resources,来防止我们资源导出失败的问题--> <build> <resources> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> </resources> </build> </project>
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3、建立数据库连接(在schemas中选择连接的数据库)
4、建立相应的包
5、编写配置文件
- mybatis核心配置文件框架
<?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> </configuration>
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- spring核心配置文件框架
<?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"> </beans>
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将连接数据库的一些操作封装起来
driver=com.mysql.cj.jdbc.Driver url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&serverTimezone=Asia/Shanghai username=root password=root
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在mybatis核心配置文件中引入
<?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> <!--配置数据源 交给spring去做--> <!--起别名--> <typeAliases> <typeAlias type="com.zheng.pojo.Books" alias="Books"/> </typeAliases> <!--在mybatis核心配置文件中注册mapper文件--> <mappers> <mapper class="com.zheng.dao.BookMapper"/> </mappers> </configuration>
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编写实体类
package com.zheng.pojo; public class Books { private int bookId; private String bookName; private int bookCounts; private String detail; public Books( ) { } public Books(int bookId, String bookName, int bookCounts, String detail) { this.bookId = bookId; this.bookName = bookName; this.bookCounts = bookCounts; this.detail = detail; } public int getBookId() { return bookId; } public void setBookId(int bookId) { this.bookId = bookId; } public String getBookName() { return bookName; } public void setBookName(String bookName) { this.bookName = bookName; } public int getBookCounts() { return bookCounts; } public void setBookCounts(int bookCounts) { this.bookCounts = bookCounts; } public String getDetail() { return detail; } public void setDetail(String detail) { this.detail = detail; } @Override public String toString() { return "Books{" + "bookId=" + bookId + ", bookName='" + bookName + '\'' + ", bookCounts=" + bookCounts + ", detail='" + detail + '\'' + '}'; } }
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编写dao层
package com.zheng.dao; import com.zheng.pojo.Books; import java.util.List; public interface BookMapper { /** * 增加一本书 */ int addBook(Books books); /** * 删除一本书 */ int deleteBookById(int id); /** * 更新一本书 */ int updateBook(Books books); /** * 查询所有的书籍 */ List<Books> queryAllBook(); /** * 查询一本书籍通过id */ Books queryBookById(int id); }
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编写对应的mapper文件
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.zheng.dao.BookMapper"> <!--* 增加一本书--> <insert id="addBook" parameterType="Books"> insert into ssmbuild.books (bookId,bookName,bookCounts,detail) values(#{bookId},#{bookName},#{bookCounts},#{detail}) </insert> <!--* 删除一本书--> <delete id="deleteBookById" parameterType="int"> delete from ssmbuild.books where bookId=#{bookId} </delete> <!-- * 更新一本书--> <update id="updateBook" parameterType="Books"> update ssmbuild.books set bookId=#{bookId},bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail} where bookId=#{bookId} </update> <!--* 查询所有的书籍--> <select id="queryAllBook" parameterType="Books"> select * from ssmbuild.books </select> <!--* 查询一本书籍通过id--> <select id="queryBookById" resultType="Books"> select * from ssmbuild.books where bookId=#{bookId} </select> </mapper>
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编写service层(service调用dao层)
接口
package com.zheng.service; import com.zheng.pojo.Books; import java.util.List; public interface BookService { /** * 增加一本书 */ int addBook(Books books); /** * 删除一本书 */ int deleteBookById(int id); /** * 更新一本书 */ int updateBook(Books books); /** * 查询所有的书籍 */ List<Books> queryAllBook(); /** * 查询一本书籍通过id */ Books queryBookById(int id); }
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编写接口实现子类
package com.zheng.service; import com.zheng.dao.BookMapper; import com.zheng.pojo.Books; import java.util.List; public class BookServiceImpl implements BookService{ //业务层调用dao层,组合dao private BookMapper bookMapper; public void setBookMapper(BookMapper bookMapper) { this.bookMapper = bookMapper; } public int addBook(Books books) { return bookMapper.addBook(books); } public int deleteBookById(int id) { return bookMapper.deleteBookById(id); } public int updateBook(Books books) { return bookMapper.updateBook(books); } public List<Books> queryAllBook() { return bookMapper.queryAllBook(); } public Books queryBookById(int id) { return bookMapper.queryBookById(id); } }
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整合mybatis
核心配置文件
mybatis-config.xml
<?xml version="1.0" encoding="UTF8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!--配置数据源 交给spring去做--> <!--起别名--> <typeAliases> <typeAlias type="com.zheng.pojo.Books" alias="Books"/> </typeAliases> <!--在mybatis核心配置文件中注册mapper文件--> <mappers> <mapper class="com.zheng.dao.BookMapper"/> </mappers> </configuration>
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database.properties
jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&serverTimezone=Asia/Shanghai jdbc.username=root jdbc.password=root
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整合spring
- 整合dao接口
spring-dao.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" 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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--1、关联数据库配置文件--> <context:property-placeholder location="classpath:database.properties"></context:property-placeholder> <!--2、连接池 dbcp:半自动连接,不能自动连接 c3p0:自动化操作,自动化的加载配置文件,并且可以自动设置到对象中 druid:hikari --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <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> <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、sqlsessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!--绑定mybatis的配置文件--> <property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <!--4、配置dao接口扫描包,动态的实现Dao接口可以注入到spring容器中--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入sqlsessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!--要扫描的包--> <property name="basePackage" value="com.zheng.dao"/> </bean> </beans>
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- 整合service接口
spring-service.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" 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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--扫描service下的包--> <context:component-scan base-package="com.zheng.service"/> <!--2、将我们的所有业务类,注入到spring,可以通过配置,或者注解实现--> <bean id="BookServiceImpl" class="com.zheng.service.BookServiceImpl"> <property name="bookMapper" ref="bookMapper"/> </bean> <!--3、声明事务配置--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!--注入数据源--> <property name="dataSource" ref="dataSource"/> </bean> </beans>
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整合spingmvc
1、给maven项目加入框架
2、配置web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <!--配置DispatchServlet;这个是springMVC的核心,请求分发器,前端控制器--> <servlet> <servlet-name>springMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--里边的路径是编写的配置文件--> <param-value>classpath:applicationContext.xml</param-value> </init-param> <!--启动级别--> <load-on-startup>1</load-on-startup> </servlet> <!--在springMVC中,/:代表匹配所有的请求,不包括jsp页面。/*:匹配所有的请求,包括jsp--> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--乱码过滤--> <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> </web-app>
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3、配置spring-mvc.xml
<?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:mvc="http://www.springframework.org/schema/mvc" 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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--1、注解驱动--> <mvc:annotation-driven/> <!--2、静态资源过滤--> <mvc:default-servlet-handler/> <!--3、自动扫描包(controller)--> <context:component-scan base-package="com.zheng.controller"/> <!--4、视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"> <!--前缀--> <property name="prefix" value="/WEB-INF/jsp/"/> <!--后缀--> <property name="suffix" value=".jsp"/> </bean> </beans>
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测试
package com.zheng.controller; import com.zheng.pojo.Books; import com.zheng.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.RequestMapping; import java.util.List; @Controller @RequestMapping("/book") public class BookController { @Autowired @Qualifier("BookServiceImpl") private BookService bookService; //查询所有的书籍,并且返回一个书籍展示页面 @RequestMapping("/queryAll") public String list(Model model){ List<Books> books = bookService.queryAllBook(); model.addAttribute("list:",books); return "allBook"; } }
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遇到的问题:
1、lib文件的位置和class平级
项目启动失败,报找不到类
applicationContext
<?xml version="1.0" encoding="UTF8"?> <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="classpath:spring-dao.xml"/> <import resource="classpath:spring-service.xml"/> <import resource="classpath:spring-mvc.xml"/> </beans>
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2、编码字节无效
。将resources配置文件的utf-8写成utf8
mapper文件中的也要修改
3、在web.xml文件中地址位置改掉
<!--里边的路径是编写的配置文件--> <param-value>classpath:applicationContext.xml</param-value>
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