RootConfig类

 package com.ssm.yjblogs.config;

 import java.util.Properties;

 import javax.sql.DataSource;

 import org.apache.commons.dbcp.BasicDataSourceFactory;

 import org.mybatis.spring.SqlSessionFactoryBean;

 import org.mybatis.spring.mapper.MapperScannerConfigurer;

 import org.springframework.context.annotation.Bean;

 import org.springframework.context.annotation.ComponentScan;

 import org.springframework.context.annotation.ComponentScan.Filter;

 import org.springframework.context.annotation.Configuration;

 import org.springframework.context.annotation.FilterType;

 import org.springframework.core.io.ClassPathResource;

 import org.springframework.core.io.Resource;

 //import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;

 //import org.springframework.data.redis.core.RedisTemplate;

 //import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;

 //import org.springframework.data.redis.serializer.RedisSerializer;

 //import org.springframework.data.redis.serializer.StringRedisSerializer;

 import org.springframework.jdbc.datasource.DataSourceTransactionManager;

 import org.springframework.stereotype.Repository;

 import org.springframework.stereotype.Service;

 import org.springframework.transaction.PlatformTransactionManager;

 import org.springframework.transaction.annotation.EnableTransactionManagement;

 import org.springframework.transaction.annotation.TransactionManagementConfigurer;

 //import redis.clients.jedis.JedisPoolConfig;

 @Configuration

 //定义Spring 扫描的包

 @ComponentScan(value= "com.*", includeFilters= {@Filter(type = FilterType.ANNOTATION, value ={Service.class})})

 //使用事务驱动管理器

 @EnableTransactionManagement

 //实现接口TransactionManagementConfigurer，这样可以配置注解驱动事务

 public class RootConfig implements TransactionManagementConfigurer {

     private DataSource dataSource = null;

     /**

      * 配置数据库.

      * @return 数据连接池

      */

     @Bean(name = "dataSource") //使用@Bean装配数据源  P245

     public DataSource initDataSource() {

         if (dataSource != null) {

             return dataSource;

         }

         Properties props = new Properties();

         props.setProperty("driverClassName", "com.mysql.jdbc.Driver");//jdbc驱动

         props.setProperty("url", "jdbc:mysql://localhost:3306/chapter22");//url

         props.setProperty("username", "yujie");//数据库账号

         props.setProperty("password", "123456");//数据库密码

        props.setProperty("maxActive", "200");//最大连接数量

         props.setProperty("maxIdle", "20");//最大的空闲连接数量

         props.setProperty("maxWait", "30000");//最大的等待时间，单位是毫秒

         try {

             dataSource = BasicDataSourceFactory.createDataSource(props);

         } catch (Exception e) {

             e.printStackTrace();

         }

         return dataSource;

     }

     /***

      * 配置SqlSessionFactoryBean

      * @return SqlSessionFactoryBean

      */

     @Bean(name="sqlSessionFactory")

     public SqlSessionFactoryBean initSqlSessionFactory() {

         SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();

         sqlSessionFactory.setDataSource(initDataSource());

         //配置MyBatis配置文件

         //src下的mybatis配置文件

         Resource resource = new ClassPathResource("mybatis/mybatis-config.xml");

         sqlSessionFactory.setConfigLocation(resource);

         return sqlSessionFactory;

     }

     /***

      * 通过自动扫描，发现MyBatis Mapper接口

      * @return Mapper扫描器

      */

     //P325

     @Bean

     public MapperScannerConfigurer initMapperScannerConfigurer() {

         MapperScannerConfigurer msc = new MapperScannerConfigurer();

         //以com.开头的

         msc.setBasePackage("com.*");

         //设置SqlSessionFactoryBean名字

         msc.setSqlSessionFactoryBeanName("sqlSessionFactory");

         //把注解为@Repository的接口扫描为Mapper对象，存放在容器中，对于多个包的扫描可以用半角逗号分隔开来

         //注解为@Repository的接口表示数据访问层(DAO, Data Access Object)

         msc.setAnnotationClass(Repository.class);

         return msc;

     }

     /**

      * 实现接口方法，注册注解事务，当@Transactional 使用的时候产生数据库事务

      */

     @Override

     @Bean(name="annotationDrivenTransactionManager")

     //P334

     public PlatformTransactionManager annotationDrivenTransactionManager() {

         DataSourceTransactionManager transactionManager =

            new DataSourceTransactionManager();

         transactionManager.setDataSource(initDataSource());

         return transactionManager;

     }

 //    @Bean(name = "redisTemplate")

 //    public RedisTemplate initRedisTemplate() {

 //        JedisPoolConfig poolConfig = new JedisPoolConfig();

 //        //最大空闲数

 //        poolConfig.setMaxIdle(50);

 //        //最大连接数

 //        poolConfig.setMaxTotal(100);

 //        //最大等待毫秒数

 //        poolConfig.setMaxWaitMillis(20000);

 //        //创建Jedis链接工厂

 //        JedisConnectionFactory connectionFactory = new JedisConnectionFactory(poolConfig);

 //        connectionFactory.setHostName("localhost");

 //        connectionFactory.setPort(6379);

 //        //调用后初始化方法，没有它将抛出异常

 //        connectionFactory.afterPropertiesSet();

 //        //自定Redis序列化器

 //        RedisSerializer jdkSerializationRedisSerializer = new JdkSerializationRedisSerializer();

 //        RedisSerializer stringRedisSerializer = new StringRedisSerializer();

 //        //定义RedisTemplate，并设置连接工程[修改为：工厂]

 //        RedisTemplate redisTemplate = new RedisTemplate();

 //        redisTemplate.setConnectionFactory(connectionFactory);

 //        //设置序列化器

 //        redisTemplate.setDefaultSerializer(stringRedisSerializer);

 //        redisTemplate.setKeySerializer(stringRedisSerializer);

 //        redisTemplate.setValueSerializer(stringRedisSerializer);

 //        redisTemplate.setHashKeySerializer(stringRedisSerializer);

 //        redisTemplate.setHashValueSerializer(stringRedisSerializer);

 //        return redisTemplate;

 //    }

 }

无行号版本:

package com.ssm.yjblogs.config;

import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSourceFactory;

import org.mybatis.spring.SqlSessionFactoryBean;

import org.mybatis.spring.mapper.MapperScannerConfigurer;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.ComponentScan.Filter;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.FilterType;

import org.springframework.core.io.ClassPathResource;

import org.springframework.core.io.Resource;

//import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;

//import org.springframework.data.redis.core.RedisTemplate;

//import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;

//import org.springframework.data.redis.serializer.RedisSerializer;

//import org.springframework.data.redis.serializer.StringRedisSerializer;

import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import org.springframework.stereotype.Repository;

import org.springframework.stereotype.Service;

import org.springframework.transaction.PlatformTransactionManager;

import org.springframework.transaction.annotation.EnableTransactionManagement;

import org.springframework.transaction.annotation.TransactionManagementConfigurer;

//import redis.clients.jedis.JedisPoolConfig;

@Configuration

//定义Spring 扫描的包

@ComponentScan(value= "com.*", includeFilters= {@Filter(type = FilterType.ANNOTATION, value ={Service.class})})

//使用事务驱动管理器

@EnableTransactionManagement

//实现接口TransactionManagementConfigurer，这样可以配置注解驱动事务

public class RootConfig implements TransactionManagementConfigurer {

    private DataSource dataSource = null;

    /**

     * 配置数据库.

     * @return 数据连接池

     */

    @Bean(name = "dataSource") //使用@Bean装配数据源  P245

    public DataSource initDataSource() {

        if (dataSource != null) {

            return dataSource;

        }

        Properties props = new Properties();

        props.setProperty("driverClassName", "com.mysql.jdbc.Driver");//jdbc驱动

        props.setProperty("url", "jdbc:mysql://localhost:3306/chapter22");//url

        props.setProperty("username", "yujie");//数据库账号

        props.setProperty("password", "123456");//数据库密码

       props.setProperty("maxActive", "200");//最大连接数量

        props.setProperty("maxIdle", "20");//最大的空闲连接数量

        props.setProperty("maxWait", "30000");//最大的等待时间，单位是毫秒

        try {

            dataSource = BasicDataSourceFactory.createDataSource(props);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return dataSource;

    }

    /***

     * 配置SqlSessionFactoryBean

     * @return SqlSessionFactoryBean

     */

    @Bean(name="sqlSessionFactory")

    public SqlSessionFactoryBean initSqlSessionFactory() {

        SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();

        sqlSessionFactory.setDataSource(initDataSource());

        //配置MyBatis配置文件

        //src下的mybatis配置文件

        Resource resource = new ClassPathResource("mybatis/mybatis-config.xml");

        sqlSessionFactory.setConfigLocation(resource);

        return sqlSessionFactory;

    }

    /***

     * 通过自动扫描，发现MyBatis Mapper接口

     * @return Mapper扫描器

     */

    //P325

    @Bean

    public MapperScannerConfigurer initMapperScannerConfigurer() {

        MapperScannerConfigurer msc = new MapperScannerConfigurer();

        //以com.开头的

        msc.setBasePackage("com.*");

        //设置SqlSessionFactoryBean名字

        msc.setSqlSessionFactoryBeanName("sqlSessionFactory");

        //把注解为@Repository的接口扫描为Mapper对象，存放在容器中，对于多个包的扫描可以用半角逗号分隔开来

        //注解为@Repository的接口表示数据访问层(DAO, Data Access Object)

        msc.setAnnotationClass(Repository.class);

        return msc;

    }

    /**

     * 实现接口方法，注册注解事务，当@Transactional 使用的时候产生数据库事务

     */

    @Override

    @Bean(name="annotationDrivenTransactionManager")

    //P334

    public PlatformTransactionManager annotationDrivenTransactionManager() {

        DataSourceTransactionManager transactionManager =

           new DataSourceTransactionManager();

        transactionManager.setDataSource(initDataSource());

        return transactionManager;

    }

//    @Bean(name = "redisTemplate")

//    public RedisTemplate initRedisTemplate() {

//        JedisPoolConfig poolConfig = new JedisPoolConfig();

//        //最大空闲数

//        poolConfig.setMaxIdle(50);

//        //最大连接数

//        poolConfig.setMaxTotal(100);

//        //最大等待毫秒数

//        poolConfig.setMaxWaitMillis(20000);

//        //创建Jedis链接工厂

//        JedisConnectionFactory connectionFactory = new JedisConnectionFactory(poolConfig);

//        connectionFactory.setHostName("localhost");

//        connectionFactory.setPort(6379);

//        //调用后初始化方法，没有它将抛出异常

//        connectionFactory.afterPropertiesSet();

//        //自定Redis序列化器

//        RedisSerializer jdkSerializationRedisSerializer = new JdkSerializationRedisSerializer();

//        RedisSerializer stringRedisSerializer = new StringRedisSerializer();

//        //定义RedisTemplate，并设置连接工程[修改为：工厂]

//        RedisTemplate redisTemplate = new RedisTemplate();

//        redisTemplate.setConnectionFactory(connectionFactory);

//        //设置序列化器

//        redisTemplate.setDefaultSerializer(stringRedisSerializer);

//        redisTemplate.setKeySerializer(stringRedisSerializer);

//        redisTemplate.setValueSerializer(stringRedisSerializer);

//        redisTemplate.setHashKeySerializer(stringRedisSerializer);

//        redisTemplate.setHashValueSerializer(stringRedisSerializer);

//        return redisTemplate;

//    }

}