Spring与Mybatis使用JavaConfig整合

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.springdemo</groupId>
<artifactId>spring01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>spring01</name>
<url>http://maven.apache.org</url>

<properties>
<spring.version>4.3.8.RELEASE</spring.version>
<spring.security.version>4.2.3.RELEASE</spring.security.version>
<junit.version>4.12</junit.version>
<jdk.version>1.8</jdk.version>
<jsp.version>2.2</jsp.version>
<servlet.version>3.1.0</servlet.version>
<jstl.version>1.2</jstl.version>
<slf4j-version>1.7.25</slf4j-version>

<hamcrest.core.version>1.3</hamcrest.core.version>
<mockito.core.version>2.8.9</mockito.core.version>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
<version>${hamcrest.core.version}</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>${mockito.core.version}</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</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-expression</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-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-instrument</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-instrument-tomcat</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-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${spring.security.version}</version>
</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>${jsp.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>

<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.20</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j-version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.6</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>

</dependencies>
<build>
<finalName>spring01</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

AppConfig.java

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.mapper.MapperFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.alibaba.druid.pool.DruidDataSource;
import com.springdemo.bean.UserMapper;

@EnableTransactionManagement
public class AppConfig1 {

@Bean
public DruidDataSource dataSource() {
DruidDataSource ds = new DruidDataSource();
ds.setDriverClassName("com.mysql.cj.jdbc.Driver");
ds.setUrl("jdbc:mysql://localhost:3306/test?characterEncoding=utf8&useSSL=true");
ds.setUsername("root");
ds.setPassword("123456@#");
ds.setInitialSize(5);
return ds;
}

@Bean
public DataSourceTransactionManager dataSourceTransactionManager() {
return new DataSourceTransactionManager(dataSource());
}

@Bean
public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}

@Bean
public SqlSessionFactory sqlSessionFactory() throws Exception {
SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource());
sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:com/springdemo/bean/UserMapper.xml"));
sessionFactory.setTypeAliasesPackage("com.springdemo.bean");
return sessionFactory.getObject();
}

@Bean
public UserMapper userMapper(SqlSessionTemplate sqlSessionTemplate) throws Exception {
return sqlSessionTemplate.getMapper(UserMapper.class);
}

}

@EnableTransactionManagement注解是为了增加事务的支持

UserMapper.java

import java.util.List;

public interface UserMapper {
public void insert(User user);
public User selectUser(String userName);
public List<User> selectAll();
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.springdemo.bean.UserMapper">
<resultMap type="user" id="userList"><!-- type为返回列表元素的类全名或别名 -->
<result column="username" property="username" />
<result column="password" property="password" />
<result column="enabled" property="enabled" />
</resultMap>
<insert id="insert" parameterType="user">
insert into users(username,
password,enabled) values(#{username}, #{password},#{enabled})
</insert>
<select id="selectUser" parameterType="String" resultType="user">
SELECT * FROM users WHERE username = #{username}
</select>
<select id="selectAll" resultMap="userList" resultType="user">
SELECT * FROM users
</select>
</mapper>

User.java

public class User {
private String username;
private String password;
private boolean enabled;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public boolean isEnabled() {
return enabled;
}
public void setEnabled(boolean enabled) {
this.enabled = enabled;
}
@Override
public String toString() {
return "User [username=" + username + ", password=" + password + ", enabled=" + enabled + "]";
}

}

App.java

public class App {
public static void main(String[] args) {
@SuppressWarnings("resource")
ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
UserMapper userMapper = (UserMapper) context.getBean(UserMapper.class);
System.out.println(userMapper.selectAll());
}
}

ps

1、可以使用注解@MapperScan代替

@Bean
public UserMapper userMapper(SqlSessionTemplate sqlSessionTemplate) throws Exception {
return sqlSessionTemplate.getMapper(UserMapper.class);
}

自动扫描，就不用一个个接口来添加了。

2、@MapperScan(“com.springdemo.bean”)注解和

@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
MapperScannerConfigurer mScannerConfigurer = new MapperScannerConfigurer();
mScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory");
mScannerConfigurer.setBasePackage("com.springdemo.bean");
return mScannerConfigurer;
}

可以相互替换。

3、例子是使用接口+xml来实现的，如果是直接使用接口，就不用使用sessionFactory.setMapperLocations方法来设置xml位置了。