spring整合mybatis3入门

古城微笑少年丶 2023-07-02 10:24 10阅读 0赞

# 1.创建web项目 导入jia包 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw_size_16_color_FFFFFF_t_70][]

在spring基础jar包中新增
    	1.mybatis-x.x.x.x.jar
    	2.mybatis-spring-x.x.x.jar
    	3.mysql-conector-java.jar

# 2.配置web.xml文件 #

<context-param>
    		<param-name>contextConfigLocation</param-name>
    		<param-value>classpath:applicationContext.xml</param-value>
    	</context-param>
    	<listener>
    		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    	</listener>

1.在context-param初始化参数，查找applicationContext.xml文件的位置 
    							（默认去WEB-INF下查找applicationContext.xml)
    2.配置监听器
     在listener中加载org.springframeWork.web.context.ContextLoaderListener

[web.xml中的contextConfigLocation在spring中的作用][web.xml_contextConfigLocation_spring]

# 3.配置applicationContext.xml #

在src目录下创建applicationContext.xml（路径与刚才web.xml中context-param标签中的一致

1.把mybatis-config.xml中的配置放到appliactionContext.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"
           default-autowire="byName"
            >
         
         <context:property-placeholder location="classpath:db.properties"></context:property-placeholder> 
         
    	<bean id="dataScoure" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    		<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    		<property name="url" value="jdbc:mysql://localhost:3306/music"></property>
    		<property name="username" value="root"></property>
    		<property name="password" value=""></property>
    	</bean>
    	
    	<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    		<property name="dataSource" ref="dataScoure"></property>
    		
    		<property name="typeAliasesPackage" value="com.it.pojo" /> 
    	</bean>
    	
    	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    		
    		<property name="basePackage" value="com.it.mapper"></property>
    		<property name="sqlSessionFactory" ref="sessionFactory"></property>
    	</bean>
    	
    	
    	<bean id="userbiz" class="com.it.biz.impl.UserBizImpl">
    		<property name="userMapper" ref="userMapper"></property>
    	</bean>
    </beans>

# 4.创建pojo,dao,biz #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw_size_16_color_FFFFFF_t_70 1]  
其他代码和往常一样 但是在UserBizImpl中只需要写一个 private UserMapper userMapper 就可以调用,在appactionContext.xml文件中自动实例化UserMapper类。（ 需要注意的是：UserMapper类的类名必须为userMapper **这种规范命名规则** ）  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw_size_16_color_FFFFFF_t_70 2]

# 5.编写Servlet类 #

![test][]  
在init方法里获取ApplocationContext，实例化一个userbiz类。接下来就可以在doPost/doGet方法中调用biz类的方法进行页面跳转

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200128230501473.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw==,size_16,color_FFFFFF,t_70
[web.xml_contextConfigLocation_spring]: https://www.cnblogs.com/kabi/p/8080519.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200128232812376.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200128233016570.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw==,size_16,color_FFFFFF,t_70
[test]: https://img-blog.csdnimg.cn/2020012823345066.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwaWN5Q2hpY2tlbl9fXw==,size_16,color_FFFFFF,t_70