发布于 2016-08-16 09:48:26 | 204 次阅读 | 评论: 0 | 来源: 网友投递
Spring Framework 开源j2ee框架
Spring是什么呢?首先它是一个开源的项目,而且目前非常活跃;它是一个基于IOC和AOP的构架多层j2ee系统的框架,但它不强迫你必须在每一层 中必须使用Spring,因为它模块化的很好,允许你根据自己的需要选择使用它的某一个模块;它实现了很优雅的MVC,对不同的数据访问技术提供了统一的接口,采用IOC使得可以很容易的实现bean的装配,提供了简洁的AOP并据此实现Transcation Managment,等等
public interface JdbcTemplate extends JdbcOperations {
public abstract void beginTranstaion();
public abstract void commit();
public abstract void rollback();
}
public class JdbcTemplateImpl extends org.springframework.jdbc.core.JdbcTemplate implements JdbcTemplate {
private PlatformTransactionManager platformTransactionManager;
private DefaultTransactionDefinition transactionDefinition;
private ThreadLocal<TransactionStatus> transcationStatus = new ThreadLocal<TransactionStatus>();
public void beginTranstaion() {
TransactionStatus tmp = platformTransactionManager.getTransaction(transactionDefinition);
transcationStatus.set(tmp);
}
public void commit() {
TransactionStatus tmp = transcationStatus.get();
if (tmp == null) {
throw new RMSRuntimeException("no transcation");
}
platformTransactionManager.commit(tmp);
transcationStatus.remove();
}
public void rollback() {
TransactionStatus tmp = transcationStatus.get();
if (tmp == null) {
throw new RMSRuntimeException("no transcation");
}
platformTransactionManager.rollback(tmp);
transcationStatus.remove();
}
@Override
public void afterPropertiesSet() {
super.afterPropertiesSet();
transactionDefinition = new DefaultTransactionDefinition();
transactionDefinition.setIsolationLevel(TransactionDefinition.ISOLATION_READ_COMMITTED);
transactionDefinition.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
platformTransactionManager = new DataSourceTransactionManager(getDataSource());
}
public PlatformTransactionManager getPlatformTransactionManager() {
return platformTransactionManager;
}
public DefaultTransactionDefinition getTransactionDefinition() {
return transactionDefinition;
}
public ThreadLocal<TransactionStatus> getTranscationStatus() {
return transcationStatus;
}
}