文档中所有出现的文件类型必须在这里定义过的
主要的类型:
Text = text/plain
HTML = text/html
WordprocessingML =application/vnd.openxmlformats-officedocument.wordprocessingml.document
XHTML = application/xhtml+xml

<?xml version="1.0" encoding="UTF-8"?>
<!--用来定义文件类型,当前文档中出现的所有类型必须是在这里定义过的-->
<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">
	<!--
		Default:默认配置 
			Extension:扩展名 ContentType:对应的实际类型
	-->
	<Default Extension="bin" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.printerSettings"/>
	<Default Extension="png" ContentType="image/png"/>
	<!--
		Override:遇到PartName则覆盖默认配置 
			PartName:文件path ContentType:对应的实际类型
		如:
		扩展名xml默认是application/xm类型
		但/xl/theme/theme1.xml例外,因为在Override中重新设置了新类型
	-->
	<Override PartName="/xl/theme/theme1.xml" ContentType="application/vnd.openxmlformats-officedocument.theme+xml"/>
	<Override PartName="/xl/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml"/>
	<Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/>
	<Default Extension="xml" ContentType="application/xml"/>
	<Override PartName="/xl/workbook.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"/>
	<Override PartName="/docProps/app.xml" ContentType="application/vnd.openxmlformats-officedocument.extended-properties+xml"/>
	<Override PartName="/xl/worksheets/sheet2.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/>
	<Override PartName="/xl/worksheets/sheet3.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/>
	<Override PartName="/xl/drawings/drawing1.xml" ContentType="application/vnd.openxmlformats-officedocument.drawing+xml"/>
	<Override PartName="/xl/worksheets/sheet1.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/>
	<Override PartName="/xl/calcChain.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.calcChain+xml"/>
	<Override PartName="/xl/sharedStrings.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml"/>
	<Override PartName="/docProps/core.xml" ContentType="application/vnd.openxmlformats-package.core-properties+xml"/>
</Types>