mybatis执行批量更新batch update 的方法（oracle,mysql两种）
Oracle和MySQL数据库的批量update在mybatis中配置不太一样：
oracle数据库：
<codeclass="hljstcl"style=""><<spanclass="hljs-keyword"style="">update</span>id=<spanclass="hljs-string"style="">"batchUpdate"</span>parameterType=<spanclass="hljs-string"style="">"java.util.List"</span>>
<<spanclass="hljs-keyword"style="">foreach</span>collection=<spanclass="hljs-string"style="">"list"</span>item=<spanclass="hljs-string"style="">"item"</span>index=<spanclass="hljs-string"style="">"index"</span><spanclass="hljs-keyword"style="">open</span>=<spanclass="hljs-string"style="">"begin"</span><spanclass="hljs-keyword"style="">close</span>=<spanclass="hljs-string"style="">"end;"</span>separator=<spanclass="hljs-string"style="">";"</span>>
<spanclass="hljs-keyword"style="">update</span>test
<<spanclass="hljs-keyword"style="">set</span>>
test=${item.test}+<spanclass="hljs-number"style="">1</span>
</<spanclass="hljs-keyword"style="">set</span>>
whereid=${item.id}
</<spanclass="hljs-keyword"style="">foreach</span>>
</<spanclass="hljs-keyword"style="">update</span>></code>
mysql数据库：
mysql数据库采用一下写法即可执行，但是数据库连接必须配置：&allowMultiQueries=true
例如：jdbc:mysql://192.168.1.236:3306/test?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true
<codeclass="hljstcl"style=""><<spanclass="hljs-keyword"style="">update</span>id=<spanclass="hljs-string"style="">"batchUpdate"</span>parameterType=<spanclass="hljs-string"style="">"java.util.List"</span>>
<<spanclass="hljs-keyword"style="">foreach</span>collection=<spanclass="hljs-string"style="">"list"</span>item=<spanclass="hljs-string"style="">"item"</span>index=<spanclass="hljs-string"style="">"index"</span><spanclass="hljs-keyword"style="">open</span>=<spanclass="hljs-string"style="">""</span><spanclass="hljs-keyword"style="">close</span>=<spanclass="hljs-string"style="">""</span>separator=<spanclass="hljs-string"style="">";"</span>>
<spanclass="hljs-keyword"style="">update</span>test
<<spanclass="hljs-keyword"style="">set</span>>
test=${item.test}+<spanclass="hljs-number"style="">1</span>
</<spanclass="hljs-keyword"style="">set</span>>
whereid=${item.id}
</<spanclass="hljs-keyword"style="">foreach</span>>
</<spanclass="hljs-keyword"style="">update</span>></code>
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