创建数据库
CREATE DATABASE ssmbuild
USE ssmbuild
CREATE TABLE books (
bookID INT(10) NOT NULL AUTO_INCREMENT,
bookName VARCHAR(100) NOT NULL,
bookCounts INT(11) NOT NULL,
detail VARCHAR(200) NOT NULL,
KEY bookID (bookID)
)ENGINE=INNODB DEFAULT CHARSET=utf8
INSERT INTO books(bookID,bookName,bookCounts,detail) VALUES
(2,'MySQL',10,'从删库到跑路'),(3,'Linux',5,'从进门到进牢');
连接数据库
编写实体类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
编写Dao接口
public interface BookMapper {
//增加一个Book
int add(Books books);
//根据id删除一个book
int deleteBook ( int id);
//更新BOOK
int updateBook (Books books);
//根据ID查询,返回一个Book
Books selectBooks(int id);
//查询全部Book,返回list集合
List<Books> AllBooks();
}
编写Daomapper.xml配置文件
<?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.Google.dao.BookMapper">
<!--增加一个Book-->
<insert id="add" parameterType="Books">
insert into ssmbuild.books
(bookID, bookName, bookCounts, detail)
values (#{bookID}, #{bookName}, #{bookCounts}, #{detail})
</insert>
<!--根据id删除一个book-->
<delete id="deleteBook" parameterType="_int">
delete
from ssmbuild.books
where bookID = #{bookID}
</delete>
<!--更新BOOK-->
<update id="updateBook" parameterType="Books">
update ssmbuild.books
set bookCounts=#{bookCounts},bookName=#{bookName},detail=#{detail}
where bookID = #{bookID}
</update>
<!--根据ID查询,返回一个Book-->
<select id="selectBooks" parameterType="_int" resultType="Books">
select *
from ssmbuild.books
where bookID = #{bookID}
</select>
<!--查询全部Book,返回list集合-->
<select id="AllBooks" resultType="Books">
select *
from ssmbuild.books
</select>
</mapper>
serivce接口
package com.Google.service;
import com.Google.pojo.Books;
import java.util.List;
public interface BookService {
//增加一个Book
int add(Books books);
//根据id删除一个book
int deleteBook ( int id);
//更新BOOK
int updateBook (Books books);
//根据ID查询,返回一个Book
Books selectBooks(int id);
//查询全部Book,返回list集合
List<Books> AllBooks();
}
service实现
package com.Google.service;
import com.Google.dao.BookMapper;
import com.Google.pojo.Books;
import java.util.List;
public class BookServiceImpl implements BookService {
private BookMapper bookMapper;
//调用Dao层的操作
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
@Override
public int add(Books books) {
return bookMapper.add(books);
}
@Override
public int deleteBook(int id) {
return bookMapper.deleteBook(id);
}
@Override
public int updateBook(Books books) {
return bookMapper.updateBook(books);
}
@Override
public Books selectBooks(int id) {
return bookMapper.selectBooks(id);
}
@Override
public List<Books> AllBooks() {
return bookMapper.AllBooks();
}
}
配置Mybatis-config.xml
<?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="com.Google.pojo"/>
</typeAliases>
<mappers>
<mapper resource="com/Google/dao/BookMapper.xml"/>
</mappers>
</configuration>
编写database.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=xxx
jdbc.password=xxx
将dao层注入到Spring中(创建一个spring-dao.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"
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">
<!-- 配置整合mybatis -->
<!-- 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
dbcp 半自动化操作 不能自动连接
c3p0 自动化操作(自动的加载配置文件 并且设置到对象里面)
-->
<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接口包,动态实现Dao接口注入到spring容器中 -->
<!--解释 :https://www.cnblogs.com/jpfss/p/7799806.html-->
<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="com.Google.dao"/>
</bean>
</beans>
将service层注入到Spring中(创建一个spring-service.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"
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相关的bean-->
<context:component-scan base-package="com.Google.service"/>
<bean id="BookServiceImpl" class="com.Google.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper"/>
</bean>
<!-- 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>
添加WEB框架
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">
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--这里要加载的是总配置文件-->
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<!--与Tomcat一起启动-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--乱码问题-->
<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>
<!--Session过期时间-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
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: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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--开启注解驱动-->
<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 使注解生效-->
<context:component-scan base-package="com.Google.controller"/>
<!--4.配置视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
将所有spring整合到一个applicationContext.xml中
<?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>
到这里所有的配置全部都已经完成
编写Controller
@Controller
@RequestMapping("/book")
public class bookController {
//Controller需要调用serivce层
@Autowired
@Qualifier("BookServiceImpl")
private BookService bookService;
//展示所有书籍
@RequestMapping("allBook")
···