@配置文件

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于 2021-11-11 16:41:59 首次发布

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本文详细介绍了如何将SpringCloud与SSM（Spring、SpringMVC、Mybatis）进行整合，包括MybatisUtil工具类的创建、Mapper.xml与mybatis-config.xml的配置、db.properties数据库连接属性、Maven资源过滤处理以及Spring的applicationContext.xml配置。同时，还涉及了SpringMVC的web.xml与spring-servlet.xml配置，以及解决SpringMVC乱码问题的方法。

SpringCloud

版本对照

SSM

Mybatis

MybatisUtil

public class MybatisUtil {
    private static  SqlSessionFactory sqlSessionFactory;
    static{
        //使用Mybatis获取sqlSessionFactory对象
        try {
            String resource="mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
             sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    //SqlSessionFactory完全包含了面向数据库执行Sql命令所需的所有方法
    public static SqlSession getSqlSession(){

        return   sqlSessionFactory.openSession(true);
    }
}

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="">
        </mapper>

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">
 <configueration>
 <!--引入外部配置 注意标签优先级,配置文件和标签都能写-->
    <properties resource="db.properties">
        <property name="password" value="123456"/>
    </properties>
    <!--设置控制台日志-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
        <!--数据库字段驼峰命名-->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
         <!--开启全局缓存-->
       <setting name="cacheEnabled" value="true"/>
    </settings>
    <!--完全限定类更改别名-->
    <typeAliases>
        <package name="com.my.pojo"/>
    </typeAliases>
                <!--environments环境-->
    <environments default="development">
        <environment id="development">
            <!--transactionManager事务管理-->
            <transactionManager type="JDBC"></transactionManager>
            <!--数据库连接池-->
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <!--mysql8.0要配置时区-->
                <property name="url" value="${url}"/>
                <property name="username" value="${username}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>
    </environments>
    <!--每一个Mapper.xml都需要在Mybatis核心配置文件中注册-->
<mappers>
    <package name=""/>
</mappers>
</configuration>

db.properties

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatis?useSSL=false&userUnicode=true&characterEncoding=utf-8&serverTimezone=GMT
username=root

maven过滤静态资源处理

<!--Maven滤设置 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>

Spring

applicationContext.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">
       //记得手动导入注解约束
  <context:annotation-config/>
   </beans>

Spring与Mybatis整合

SpringMVC

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>Servlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Servlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--Spring自带过滤器-->
    <filter>
        <filter-name>encoding</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>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

spring-servlet.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">

    <context:component-scan base-package="com.my.controller"/>
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>