Servlet案例-代码优化
Servlet案例-代码优化
创建SqlSessionFactory代码优化
问题:
- 代码重复
- SqlSessionFactory工厂只创建一次,不要重复创建:静态代码块
public class SqlSessionFactoryUtils {
private static SqlSessionFactory sqlSessionFactory;
static {
// 静态代码块随着类的加载而自动执行,且只执行一次
try {
String resource = "mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
public static SqlSessionFactory getSqlSessionFactory() {
return sqlSessionFactory;
}
}