JDBC学习（三）事务的隔离级别总结

<p><span style=""><span style="font-size: 9pt;">对于事务隔离级别总结一下就是：</span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US"></span></span></p>
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<p style=""><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US"><span style="">1，<span style='font: 7pt "Times New Roman";'> </span></span></span><span style="font-size: 9pt;"><span style="">读未提交（</span></span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US">read uncommitted</span><span style=""><span style="font-size: 9pt;">），读的时候，允许其他事物写</span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US"></span></span></p>
<p style=""><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US"><span style="">2，<span style='font: 7pt "Times New Roman";'> </span></span></span><span style="font-size: 9pt;"><span style="">授权读取（</span></span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US">Read Committed</span><span style=""><span style="font-size: 9pt;">），读的时候，不允许其他事务写，但可以读</span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US"></span></span></p>
<p style=""><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US"><span style="">3，<span style='font: 7pt "Times New Roman";'> </span></span></span><span style="font-size: 9pt;"><span style="">可重复读取（</span></span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US">Repeatable Read</span><span style=""><span style="font-size: 9pt;">），读的时候，其他事务可以读，写得时候，其他事务不能读。有可能会出现幻读，比如在读取过程中，有另外的数据插入</span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US"></span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span lang="EN-US"><span style="font-family: Times New Roman;">4</span></span><span style="">，</span></span><span style="">序列化（</span><span style="font-size: 9pt; font-family: Verdana;" lang="EN-US">Serializable</span><span style="">）：所有事物串行执行。</span></p>