freemarker遍历list拼接成字符串（逗号分隔）

freemarker遍历list拼接成字符串（逗号分隔）

<#assign index = 0>
 	<#if dispatch.copySend?exists>
        <#list dispatch.copySend as copySend>
			<#if index != 0>,
			${copySend?trim}
    		<#assign index = index+1>
        

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