項目結構

項目路徑可以自己定義，只要路徑映射正確就可以

pom.xml

<properties> <spring.version>5.1.5.RELEASE</spring.version> <mybatis.version>3.4.6</mybatis.version> <log4j.version>1.2.17</log4j.version> </properties> <dependencies> <!-- 測試包 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <!-- 表示開發的時候引入，發布的時候不會加載此包 --> <scope>test</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.14</version> <scope>provided</scope> </dependency> <!-- spring核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- mybatis核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- mybatis/spring包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.2</version> </dependency> <!-- 導入Mysql數據庫鏈接jar包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.17</version> </dependency> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.5</version> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>2.7.0</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter</artifactId> <version>RELEASE</version> <scope>compile</scope> </dependency> </dependencies>

Emp.java，EmpMapper.java, EmpMapper.xml

https://www.jb51.net/article/197594.htm

db.properties

# mysqljdbc.url=jdbc:mysql://localhost:3306/jektong?useUnicode=true&characterEncoding=utf-8jdbc.driver=com.mysql.jdbc.Driverjdbc.username=jektongjdbc.password=123456

這里的key值不能寫url,driver,username,password,不然后面使用${url},${username}會報錯

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' xmlns:context='http://www.springframework.org/schema/context' xmlns:jdbc='http://www.springframework.org/schema/jdbc' xmlns:jee='http://www.springframework.org/schema/jee' xmlns:tx='http://www.springframework.org/schema/tx' xmlns:aop='http://www.springframework.org/schema/aop' xmlns:mvc='http://www.springframework.org/schema/mvc' xmlns:util='http://www.springframework.org/schema/util' xsi:schemaLocation='http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsdhttp://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsdhttp://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.1.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc '> <!-- 加載配置文件并配置數據庫連接池 --> <context:property-placeholder location='classpath:db.properties'/><!--這里不要使用與name相同的屬性名比如寫成url--> <bean class='org.apache.commons.dbcp2.BasicDataSource'> <property name='url' value='${jdbc.url}'/> <property name='password' value='${jdbc.password}'/> <property name='username' value='${jdbc.username}'/> <property name='driverClassName' value='${jdbc.driver}'/> </bean> <!-- SqlSessionFactoryBean --> <bean class='org.mybatis.spring.SqlSessionFactoryBean'><!-- 引用數據源的組件 --> <property name='dataSource' ref='dataSource'/> <!-- 映射文件指定 --> <property name='mapperLocations' value='classpath*:mapper/*.xml'/> <!-- 類型別名 --> <property name='typeAliasesPackage' value='com.jektong'/></bean> <!-- sqlSessionFactory已經過時，使用sqlSessionFactoryBeanName，ref改為value --><bean class='org.mybatis.spring.mapper.MapperScannerConfigurer'> <property name='sqlSessionFactoryBeanName' value='sqlSessionFactory'/> <property name='basePackage' value='com.jektong.dao'/></bean></beans>

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