集成iBATIS3和bonecp
bonecp是一款开源的、高效的数据库连接池组件，它号称是现在最快的连接池组件，官网上称是dbcp的25倍，但是iBATIS3并没有为它开发类厂，iBATIS3只支持3中类型的类厂，分别是UNPOOLED，POOLED和JNDI，要想集成只能自己开发了，自己开发也不难，只要实现DataSourceFactory接口就可以了，代码很简单：
package com.ibatis.factory;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.ibatis.datasource.DataSourceFactory;
import org.apache.ibatis.reflection.MetaObject;
import com.jolbox.bonecp.BoneCPDataSource;
public class BoneCPFactory implements DataSourceFactory {
private DataSource dataSource;
public BoneCPFactory()
{
// 创建bonecp datasource
dataSource = new BoneCPDataSource();
}
public DataSource getDataSource() {
// TODO Auto-generated method stub
return dataSource;
}
/**
* 配置属性
*/
public void setProperties(Properties properties) {
// TODO Auto-generated method stub
Properties driverProperties = new Properties();
MetaObject metaDataSource = MetaObject.forObject(dataSource);
for (Object key : properties.keySet()) {
String propertyName = (String) key;
// 处理driver.xxx属性,e.g driver.encoding=UTF8
if (propertyName.startsWith(DRIVER_PROPERTY_PREFIX)) {
String value = properties.getProperty(propertyName);
driverProperties.setProperty(propertyName.substring(DRIVER_PROPERTY_PREFIX_LENGTH), value);
}
else
{
// 利用反射技术,初始化datasource属性的值
if (metaDataSource.hasSetter(propertyName)) {
String value = (String) properties.get(propertyName);
Object convertedValue = convertValue(metaDataSource, propertyName, value);
metaDataSource.setValue(propertyName, convertedValue);
}
}
}
// 如果配置driver.xxx属性,初始化
if (driverProperties.size() > 0) {
metaDataSource.setValue("driverProperties", driverProperties);
}
}
/**
* 转换数字和Boolean型
* @param metaDataSource
* @param propertyName
* @param value
* @return
*/
@SuppressWarnings("unchecked")
private Object convertValue(MetaObject metaDataSource, String propertyName,
String value) {
Object convertedValue = value;
Class targetType = metaDataSource.getSetterType(propertyName);
if (targetType == Integer.class || targetType == int.class) {
convertedValue = Integer.valueOf(value);
} else if (targetType == Long.class || targetType == long.class) {
convertedValue = Long.valueOf(value);
} else if (targetType == Boolean.class || targetType == boolean.class) {
convertedValue = Boolean.valueOf(value);
}
return convertedValue;
}
private static final String DRIVER_PROPERTY_PREFIX = "driver.";
private static final int DRIVER_PROPERTY_PREFIX_LENGTH = DRIVER_PROPERTY_PREFIX.length();
}
然后在Configuration.xml配置就可以了，首先配置类厂别名：
<typeAliases>
<typeAlias type="com.ibatis.factory.BoneCPFactory" alias="BONECP" />
</typeAliases>
接着配置environmen：
<environments default="defaultEV">
<environment id="defaultEV">
<transactionManager type="JDBC"></transactionManager>
<dataSource type="BONECP">
<property name="driverClass" value="${driver}" />
<property name="username" value="${user}" />
<property name="password" value="${password}" />
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/bone" />
<property name="idleMaxAge" value="10" />
<property name="partitionCount" value="1" />
<property name="maxConnectionsPerPartition" value="5" />
<property name="minConnectionsPerPartition" value="1" />
<property name="driver.encoding" value="UTF8" />
</dataSource>
</environment>
</environments>
需要配置的属性很简单，就是BoneCPDataSource类的属性。如此就大功告成了。