aRuul的无名小站

• • • 0.导入依赖
    • 1.整合mybatis
      • 1.1建数据库
      • 1.2编写对应的pojo层
      • 1.3编写对应的dao层
      • 1.4编写mybatis-config.xml
      • 1.5编写mybatis-config.xml
    • 2.整合service层
      • 2.1编写service层java代码
      • 2.2编写service层配置文件spring-service.xml
    • 3.整合SpringMVC层
      • 3.1编写spring-mvc.xml
      • 3.2编写applicationContext.xml
      • 3.3编写web.xml文件
      • 3.4编写controller层

0.导入依赖

 <!--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>4.12</version>
        </dependency>
        <!--数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</version>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>

        <!--Servlet - JSP -->
        <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>

        <!--Mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.4</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>5.2.7.RELEASE</version>
        </dependency>
    </dependencies>

    <!--静态资源导出问题-->
    <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>

1.整合mybatis

1.1建数据库

1.2编写对应的pojo层

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 + '\'' +
                '}';
    }
}

1.3编写对应的dao层

• UserMapper.java

public interface BookMapper {

    //增
    int addBook(Books books);
    // 删
    int deleteBookById(@Param("bookID") int id);
    // 改
    int updateBook(Books books);
    // 查
    Books queryBookBuId(@Param("bookID") int id);
    //查全部的书
    List<Books> queryAllBook();

}

• UserMapper.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">

<!--namespace 是要绑定的类的路径-->
<mapper namespace="org.example.dao.BookMapper">

    <insert id="addBook" parameterType="books">
        insert into ssmbuild.books (bookID, bookName, bookCounts, detail)
        values (#{bookID},#{bookName},#{bookCounts},#{detail})
    </insert>

    <delete id="deleteBookById" parameterType="int">
        delete from ssmbuild.books where bookID = #{bookID}
    </delete>

    <update id="updateBook" parameterType="books">
        update ssmbuild.books set bookName=#{bookName},bookCounts=#{bookCounts}，detail=#{detail}
        where bookID=#{bookID}
    </update>

    <select id="queryBookBuId" parameterType="int" resultType="books">
        select * from ssmbuild.books where bookID=#{bookID}
    </select>

    <select id="queryAllBook" resultType="books">
        select * from ssmbuild.books
    </select>

</mapper>

1.4编写mybatis-config.xml

这里的话mybatis-config.xml中不用写数据库连接池，而是统一交由spring来处理

<?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>

    <!--设置日志-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    <!--别名-->
    <typeAliases>
        <package name="org.example.pojo"/>
    </typeAliases>

    <!--mapper映射  扫描dao包-->
    <mappers>
        <package name="org.example.dao"/>
    </mappers>
</configuration>

1.5编写mybatis-config.xml

也就是将dao层整合到spring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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--关联数据库 c3p0连接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
        <property name="jdbcUrl"
                  value="jdbc:mysql://localhost:3306/ssmbuild?serverTimezone=Asia/Shanghai&amp;useSSL=true&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
        <property name="user" value="root"/>
        <property name="password" value="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>

    <!--SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 绑定mybatis全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--配置dao接口扫描包，动态的实现了Dao接口可以注册到Spring容器-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--扫描要扫描的包-->
        <property name="basePackage" value="org.example.dao"/>
    </bean>

</beans>

2.整合service层

2.1编写service层java代码

package org.example.service;

import org.apache.ibatis.annotations.Param;
import org.example.pojo.Books;

import java.util.List;

/**
 * @author aRu
 * @date 2021/3/24 21:29
 */
public interface BookService {
    //增
    int addBook(Books books);
    // 删
    int deleteBookById(@Param("bookID") int id);
    // 改
    int updateBook(Books books);
    // 查
    Books queryBookBuId(@Param("bookID") int id);
    //查全部的书
    List<Books> queryAllBook();
}

package org.example.service;

import org.example.dao.BookMapper;
import org.example.pojo.Books;

import java.util.List;

/**
 * @author aRu
 * @date 2021/3/24 21:30
 */
public class BookServiceImp implements BookService{
    //service调用dao层   组合dao
    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    @Override
    public int addBook(Books books) {
        return bookMapper.addBook(books);
    }

    @Override
    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

    @Override
    public int updateBook(Books books) {
        return bookMapper.updateBook(books);
    }

    @Override
    public Books queryBookBuId(int id) {
        return bookMapper.queryBookBuId(id);
    }

    @Override
    public List<Books> queryAllBook() {
        return bookMapper.queryAllBook();
    }
}

2.2编写service层配置文件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下的包-->
    <context:component-scan base-package="org.example.service" />

    <!--ServiceImpl注入到IOC容器中-->
    <bean id="BookServiceImp" class="org.example.service.BookServiceImp">
        <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>

3.整合SpringMVC层

添加 Framework Support

3.1编写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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 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.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.扫描web相关的bean -->
    <context:component-scan base-package="org.example.controller" />

</beans>

记得在WEB-INF在新建jsp的文件

3.2编写applicationContext.xml

将之前的spring-dao.xml spring-service.xml spring-mvc.xml引入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="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>

</beans>

3.3编写web.xml文件

<?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">

    <!--DispatcherServlet-->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--一定要注意:这里加载的是总的配置文件，之前被这里坑了！-->
            <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>

    <!--encodingFilter-->
    <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>

3.4编写controller层

@Controller
@RequestMapping("/book")
public class BookController {
    //controller层 调用service层
    @Autowired
    @Qualifier("BookServiceImp")
    private BookService bookService;

    //查询全部书籍，并返回给展示页
    @RequestMapping("/allBook")
    public String list(Model model){
        List<Books> books=bookService.queryAllBook();
        model.addAttribute("list",books);

        return "allBook";
    }
    
}