在MyBatis中,可以通過(guò)配置文件或者代碼來(lái)實(shí)現(xiàn)ExecutorType的動(dòng)態(tài)切換。以下是兩種常用的方法:
在MyBatis的配置文件(通常是mybatis-config.xml)中配置多個(gè)不同的Environment,并指定不同的ExecutorType。然后在創(chuàng)建SqlSessionFactory對(duì)象時(shí),根據(jù)不同的條件選擇對(duì)應(yīng)的Environment。示例如下:
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<!-- configuration for datasource -->
</dataSource>
</environment>
<environment id="production">
<transactionManager type="JDBC"/>
<dataSource type="UNPOOLED">
<!-- configuration for datasource -->
</dataSource>
</environment>
</environments>
<build>
<environments default="production">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<!-- configuration for datasource -->
</dataSource>
</environment>
<environment id="production">
<transactionManager type="JDBC"/>
<dataSource type="UNPOOLED">
<!-- configuration for datasource -->
</dataSource>
</environment>
</environments>
</build>
通過(guò)編寫(xiě)代碼在創(chuàng)建SqlSessionFactory對(duì)象時(shí),動(dòng)態(tài)設(shè)置ExecutorType。示例如下:
String environment = "development"; // or "production"
DataSource dataSource = getDataSource(environment);
TransactionFactory transactionFactory = new JdbcTransactionFactory();
Environment env = new Environment(environment, transactionFactory, dataSource);
Configuration config = new Configuration(env);
config.setDefaultExecutorType(ExecutorType.SIMPLE); // or ExecutorType.REUSE, ExecutorType.BATCH
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(config);
以上就是在MyBatis中實(shí)現(xiàn)ExecutorType的動(dòng)態(tài)切換的兩種方法,可以根據(jù)具體需求選擇適合的方式進(jìn)行實(shí)現(xiàn)。