SSM框架整合项目实战-框架搭建

2020-11-12 Java Mybatis, Spring, SpringMVC, 配置, 项目 0 评论字数统计: 2.9k(字) 阅读时长: 16(分)

SSM框架整合项目实战-框架搭建

好不容易学完了SSM, 不实战一下怎么行?

基础框架

1. 新建一个maven项目

2. 配置maven: 导入依赖和静态资源过滤问题

<!--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>4.13</version>
        <scope>test</scope>
    </dependency>
    <!--Mysql-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.21</version>
    </dependency>
    <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>
    <dependency>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>jsp-api-2.0</artifactId>
        <version>6.1.26</version>
    </dependency>
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    <!--Mybatis-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.5</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.5</version>
    </dependency>
    <!--Spring-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.2.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.2.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.12</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>

3. 编写mybatis配置文件

<?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>

4. 编写Spring的applicationContext.xmlwenjian

<?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">

</beans>

5. 创建数据库数据

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `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

INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`) VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');

Mybatis

1. 编写数据库配置文件properties

jdbc.driver=com.mysql.jdbc.Driver
# 如果使用的是MySQL 8.0+,需要添加时区设置 &serverTimezone=Asia/Shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=zzz

2. 编写数据库对应的实体类

package zone.yiqing.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @Author Yiqing Zhang
 * @Date 2020-11-12 10:19 a.m.
 * @Version 1.0
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

3. 编写Mybatis核心配置文件

<?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-->
    <typeAliases>
        <package name="zone.yiqing.pojo"/>
    </typeAliases>
    <mappers>
        <mapper class="zone.yiqing.dao.BookMapper"/>
    </mappers>
</configuration>

4. dao层

4.1 interface

package zone.yiqing.dao;

import org.apache.ibatis.annotations.Param;
import zone.yiqing.pojo.Books;

import java.util.List;

/**
 * @Author Yiqing Zhang
 * @Date 2020-11-12 10:22 a.m.
 * @Version 1.0
 */
public interface BookMapper {
    // 增加一本书
    int addBook(Books books);
    // 删除一本书
    int deleteBookById(@Param("bookId") int id);
    // 更新一本书
    int updateBook(Books books);
    // 查询一本书
    Books queryBookById(int id);
    // 查询全部书
    List<Books> queryAllBook();
}

4.2 mapper.xml

<?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="zone.yiqing.dao.BookMapper">
    <insert id="addBook" parameterType="Books">
        insert into books (bookName,bookCounts,detail)
        values (#{bookName},#{bookCounts},#{detail});
    </insert>
    <delete id="deleteBookById" parameterType="int">
        delete from books where bookID = #{bookId}
    </delete>
    <update id="updateBook" parameterType="Books">
        update books
        set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookID=#{bookID};
    </update>
    <select id="queryBookById" resultType="Books">
        select * from books
        where bookID=#{bookID};
    </select>
    <select id="queryAllBook" resultType="Books">
        select * from books;
    </select>
</mapper>

5. 将mapper在mabatis中注册(见3)

6. service层

service层和dao层的区别: dao是操作数据库,service层是处理业务,只是在该项目中,业务基本和dao层重合,所以可以理解为service是dao层的一个代理

6.1 interface

package zone.yiqing.service;

import zone.yiqing.pojo.Books;

import java.util.List;

/**
 * @Author Yiqing Zhang
 * @Date 2020-11-12 10:33 a.m.
 * @Version 1.0
 */
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);
    // 查询一本书
    Books queryBookById(int id);
    // 查询全部书
    List<Books> queryAllBook();
}

6.2 编写实现类

注意因为是整合Spring,所以要有注入方式

package zone.yiqing.service;

import zone.yiqing.dao.BookMapper;
import zone.yiqing.pojo.Books;

import java.util.List;

/**
 * @Author Yiqing Zhang
 * @Date 2020-11-12 10:35 a.m.
 * @Version 1.0
 */
public class BookServiceImpl implements BookService {
    //service层调dao层:组合
    private BookMapper bookMapper;

    //为了spring托管,增加set方法
    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 Books queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }

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

Spring层

1. 整合dao层

在resources下新建文件 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
        https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <!--1.关联数据库配置文件, 不再通过Mybatis去读了,用Spring去读-->
    <context:property-placeholder location="classpath:database.properties"/>
    <!--2.连接池
    dbcp: 半自动化,不能自动连接
    c3p0: 自动化操作,自动化加载配置文件,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连接池的自由属性-->
        <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.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"/>
    </bean>

    <!--
    配置dao接口扫描包,动态实现了Dao接口可以注入到Spring容器中
    实现类impl不用再手动自己写,Spring通过反射做了
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="zone.yiqing.dao"/>
    </bean>
</beans>

2. 整合service层

<?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
        https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <!--1.扫描service下的包-->
    <context:component-scan base-package="zone.yiqing.service"/>

    <!--2.将我们的所有业务类,注入Spring,可以通过配置,或者注解实现-->
    <bean id="BookServiceImpl" class="zone.yiqing.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3.声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--4.aop事务支持-->
</beans>

3. 在applicationContext.xml中引入

<?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">

    <import resource="spring-dao.xml"/>
    <import resource="spring-service.xml"/>

</beans>

SpringMVC层

1. 将项目添加web项目支持

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">
    <!--DispatherServlet-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <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>
        <!--解决包括jsp的乱码-->
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--session-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

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
        https://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">

    <!--注解驱动-->
    <mvc:annotation-driven/>
    <!--静态资源过滤-->
    <mvc:default-servlet-handler/>
    <!--扫描包:controller-->
    <context:component-scan base-package="zone.yiqing.controller"/>
    <!--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>

4. 在WEB-INF下创建jsp文件夹用于存放静态页面

以上就是一个SSM框架搭建的Java WEB项目模板,可以用于基础来构建所有项目

本文链接： http://yiiiqing.github.io/2020/11/12/SSM%E6%A1%86%E6%9E%B6%E6%95%B4%E5%90%88%E9%A1%B9%E7%9B%AE%E5%AE%9E%E6%88%98-%E6%A1%86%E6%9E%B6%E6%90%AD%E5%BB%BA/

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