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死磕了关于MyBatis10种超好用的写法-程序员麦冬
source link: https://blog.51cto.com/14849432/2514473
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用来循环容器的标签forEach,查看例子foreach元素的属性主要有item，index，collection，open，separator，close。item：集合中元素迭代时的别名index：集合中元素迭代时的索引open：常用语where语句中，表示以什么开始，比如以'('开始separator：表示在每次进行迭代时的分隔符close 常用语where语句中，表示以什么结束在使用for
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