项目

2023-12-24 20:07:16

一.环境配置

1.springmvc 搭建流程

pom.xml :

<!--1.Maven依赖spring-webmvc-->
<dependencies>
    <repositories>
        <repository>
            <id>aliyun</id>
            <name>aliyun</name>
            <url>https://maven.aliyun.com/repository/public</url>
        </repository>


     <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- Jackson -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.11.0</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.11.0</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.11.0</version>
        </dependency>
</repositories>

web.xml:

 <!--2.配置DispatcherServlet-->
    <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:applicationContext*.xml</param-value>
        </init-param>
        <load-on-startup>0</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

applicationcontent.xml:

 <!--3.开启SpringMVC注解模式-->
    <context:component-scan base-package="com.imooc"/><!--扫描组件-->
    <mvc:annotation-driven>
     
    </mvc:annotation-driven>
    <mvc:default-servlet-handler/>

web.xml

<!-- 4.解决中文乱码 -->
    <filter>
        <filter-name>characterFilter</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>characterFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

 

在<mvc:annotation-driven>标签下添加 

<mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=utf-8</value>
                        <!--5.JSON(Jackson)序列化输出配置 -->
                        <value>application/json;charset=utf-8</value>
                    </list>
                </property>
            </bean>
</mvc:message-converters>

2.freemarker搭建

<!--1.Maven依赖-->

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.6.RELEASE</version>
        </dependency>

        <!--Freemarker-->
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.30</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>5.2.6.RELEASE</version>
        </dependency>

applicationContext.xml

<!-- 配置Freemarker模板引擎 -->
    <bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
        <property name="templateLoaderPath" value="/ftl"/>
        <property name="freemarkerSettings">
            <props>
                <prop key="defaultEncoding">UTF-8</prop><!--ajax在读取文件时 -->
            </props>
        </property>
    </bean>
    <bean id="ViewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
        <property name="contentType" value="text/html;charset=utf-8"/><!--渲染后响应输出时 -->
        <property name="suffix" value=".ftl"/>
    </bean>

3.Mybatis整合

<!--Mybatis整合步骤: 1.引入依赖 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.4</version>
        </dependency>
        <!-- MyBatis与Spring整合组件 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.3</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.16</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.14</version>
        </dependency>
 <!-- MyBatis与Spring的整合配置 -->

applicationContext.xml
    

<!--2.配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/imooc_reader?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=Asia/Shanghai&amp;allowPublicKeyRetrieval=true"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <property name="initialSize" value="5"/>
        <property name="maxActive" value="20"/>
    </bean>
    <!-- 3. SqlSessionFactoryBean用于根据配置信息创建SqlSessionFactory,不再需要我们自己编码创建 -->
    <!-- 原生Mybaits与Spring整合
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    -->
    <bean id="sessionFactory" class="com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mappers/*.xml"/>
        <!-- 5.MyBatis配置文件地址 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <!--4.配置Mapper扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.imooc.reader.mapper"/>
    </bean>

4.junit

<!-- 单元测试依赖 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

5.logback

<!-- logback日志组件 -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>

创建logback.xml

<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{HH:mm:ss} %-5level [%thread] %logger{30} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    <root level="debug">
        <appender-ref ref="console"/>
    </root>
</configuration>

6.声明式事务

applicationcontext.xml

<!--声明式事务配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager"/>

7.MyBatis-Plus

1.添加依赖

 <!-- MyBatis-Plus依赖 -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.3.2</version>
        </dependency>

2.在applicationContext.xml的sessionFactory处替换
   

<!--    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">-->
    <bean id="sessionFactory" class="com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mappers/*.xml"/>

        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

3.添加分页组件   在mybatis-config.xml中添加

    <plugins>
        <plugin interceptor="com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor"/>
    </plugins>

4.MyBatis-Plus核心注解

@TableName - 将实体类与表名映射
@TableId - 说明对应属性是表的主键
@TableField - 设置属性与列名的对应关系

与字段名相同时或符合驼峰命名规则时(book_name-----bookName)属性可省略

5.使用步骤

1.创建实体类,基于@Table/@TableId/@TableField进行自动映射
2.创建Mapper接口继承BaseMapper,创建Mapper XML
3.开发时注入Mapper对象,通过内置API实现CRUD操作


6.BaseMapper接口核心AP

方法名 用途
insert(entity) 数据新增,自动生成insert sql,根据@TableId决定注解生成方式
updateById(entity) 根据主键更新对应对象,自动生成update sql
deleteById(id) 根据主键删除数据,自动生成delete sql
selectById(id) 按主键查询对应的实体对象
selectList(queryWrapper) 根据查询生成器(QueryWrapper)的条件自动生成sql查询返回List集合
selectPage(page,queryWrapper) 分页查询方法,自动生成分页limit子句,返回IPage分页对象

 

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