📄 在struts 2中实现文件上传 - max on java - blogjava.htm
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style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">finally</SPAN> <SPAN
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ExpandedSubBlockStart.gif"
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ContractedSubBlock.gif"
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style="COLOR: #0000ff">if</SPAN> <SPAN style="COLOR: #000000">(</SPAN> <SPAN
style="COLOR: #0000ff">null</SPAN> <SPAN style="COLOR: #000000"></SPAN><SPAN
style="COLOR: #000000">!=</SPAN> <SPAN style="COLOR: #000000">in) </SPAN><SPAN
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/dot.gif"> </SPAN><SPAN
id=Codehighlighter1_1506_1529_Open_Text><SPAN style="COLOR: #000000">{<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
in.close();<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ExpandedSubBlockEnd.gif"
align=top> }</SPAN>
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ExpandedSubBlockStart.gif"
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ContractedSubBlock.gif"
align=top> </SPAN> <SPAN
style="COLOR: #0000ff">if</SPAN> <SPAN style="COLOR: #000000">(</SPAN> <SPAN
style="COLOR: #0000ff">null</SPAN> <SPAN style="COLOR: #000000"></SPAN><SPAN
style="COLOR: #000000">!=</SPAN> <SPAN style="COLOR: #000000">out) </SPAN><SPAN
id=Codehighlighter1_1551_1575_Closed_Text
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/dot.gif"> </SPAN><SPAN
id=Codehighlighter1_1551_1575_Open_Text><SPAN style="COLOR: #000000">{<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
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style="COLOR: #000000"><BR><IMG id=Codehighlighter1_1604_1632_Open_Image
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align=top> }</SPAN> </SPAN><SPAN
style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">catch</SPAN> <SPAN
style="COLOR: #000000">(Exception e)</SPAN> <SPAN
id=Codehighlighter1_1604_1632_Closed_Text
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/dot.gif"> </SPAN><SPAN
id=Codehighlighter1_1604_1632_Open_Text><SPAN style="COLOR: #000000">{<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
e.printStackTrace();<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ExpandedSubBlockEnd.gif"
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align=top> }</SPAN> </SPAN><SPAN style="COLOR: #000000"><BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
<BR><IMG id=Codehighlighter1_1692_1768_Open_Image
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ContractedSubBlock.gif"
align=top> </SPAN> <SPAN style="COLOR: #0000ff">private</SPAN>
<SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">static</SPAN>
<SPAN style="COLOR: #000000">String getExtention(String fileName) </SPAN><SPAN
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/dot.gif"> </SPAN><SPAN
id=Codehighlighter1_1692_1768_Open_Text><SPAN style="COLOR: #000000">{<BR><IMG
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</SPAN> <SPAN style="COLOR: #0000ff">int</SPAN> <SPAN
style="COLOR: #000000">pos </SPAN><SPAN style="COLOR: #000000">=</SPAN> <SPAN
style="COLOR: #000000">fileName.lastIndexOf(</SPAN> <SPAN
style="COLOR: #000000">"</SPAN> <SPAN style="COLOR: #000000">.</SPAN> <SPAN
style="COLOR: #000000">"</SPAN> <SPAN style="COLOR: #000000">);<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
</SPAN> <SPAN style="COLOR: #0000ff">return</SPAN>
<SPAN style="COLOR: #000000">fileName.substring(pos);<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ExpandedSubBlockEnd.gif"
align=top> }</SPAN> </SPAN><SPAN style="COLOR: #000000"><BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
<BR><IMG src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif"
align=top> @Override<BR><IMG
id=Codehighlighter1_1807_2044_Open_Image
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ContractedSubBlock.gif"
align=top> </SPAN> <SPAN style="COLOR: #0000ff">public</SPAN> <SPAN
style="COLOR: #000000">String execute() </SPAN> <SPAN
id=Codehighlighter1_1807_2044_Closed_Text
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src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/dot.gif"> </SPAN><SPAN
id=Codehighlighter1_1807_2044_Open_Text><SPAN style="COLOR: #000000">{
<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
imageFileName </SPAN><SPAN
style="COLOR: #000000">=</SPAN> <SPAN style="COLOR: #000000"></SPAN><SPAN
style="COLOR: #0000ff">new</SPAN> <SPAN style="COLOR: #000000">Date().getTime()
</SPAN><SPAN style="COLOR: #000000">+</SPAN> <SPAN
style="COLOR: #000000">getExtention(fileName);<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
File imageFile </SPAN><SPAN
style="COLOR: #000000">=</SPAN> <SPAN style="COLOR: #000000"></SPAN><SPAN
style="COLOR: #0000ff">new</SPAN> <SPAN
style="COLOR: #000000">File(ServletActionContext.getServletContext().getRealPath(</SPAN>
<SPAN style="COLOR: #000000">"</SPAN> <SPAN
style="COLOR: #000000">/UploadImages</SPAN> <SPAN
style="COLOR: #000000">"</SPAN> <SPAN style="COLOR: #000000">) </SPAN><SPAN
style="COLOR: #000000">+</SPAN> <SPAN style="COLOR: #000000"></SPAN><SPAN
style="COLOR: #000000">"</SPAN> <SPAN style="COLOR: #000000">/</SPAN> <SPAN
style="COLOR: #000000">"</SPAN> <SPAN style="COLOR: #000000"></SPAN><SPAN
style="COLOR: #000000">+</SPAN> <SPAN
style="COLOR: #000000">imageFileName);<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
copy(myFile, imageFile);<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
</SPAN> <SPAN style="COLOR: #0000ff">return</SPAN>
<SPAN style="COLOR: #000000">SUCCESS;<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ExpandedSubBlockEnd.gif"
align=top> }</SPAN> </SPAN><SPAN style="COLOR: #000000"><BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/InBlock.gif" align=top>
<BR><IMG
src="在Struts 2中实现文件上传 - Max On Java - BlogJava.files/ExpandedBlockEnd.gif"
align=top>}</SPAN> </SPAN></DIV><SPAN
style="FONT-SIZE: smaller; FONT-STYLE: italic">清单3
tutorial/FileUploadAction.java</SPAN>
<P>在FileUploadAction中我分别写了setMyFileContentType、setMyFileFileName、setMyFile和setCaption四个Setter方法，后两者很容易明白，分别对应FileUpload.jsp中的<s:file/>和<s:textfield/>标志。但是前两者并没有显式地与任何的页面标志绑定，那么它们的值又是从何而来的呢？其实，<s:file/>标志不仅仅是绑定到myFile，还有myFileContentType（上传文件的MIME类型）和myFileFileName（上传文件的文件名，该文件名不包括文件的路径）。因此，<s:file
name="xxx" />对应Action类里面的xxx、xxxContentType和xxxFileName三个属性。</P>
<P>FileUploadAction作用是将浏览器上传的文件拷贝到WEB应用程序的UploadImages文件夹下，新文件的名称是由系统时间与上传文件的后缀组成，该名称将被赋给imageFileName属性，以便上传成功的跳转页面使用。</P>
<P>下面我们就来看看上传成功的页面：</P>
<DIV
style="BORDER-RIGHT: #cccccc 1px solid; PADDING-RIGHT: 5px; BORDER-TOP: #cccccc 1px solid; PADDING-LEFT: 4px; FONT-SIZE: 13px; PADDING-BOTTOM: 4px; BORDER-LEFT: #cccccc 1px solid; WIDTH: 98%; WORD-BREAK: break-all; PADDING-TOP: 4px; BORDER-BOTTOM: #cccccc 1px solid; BACKGROUND-COLOR: #eeeeee"><SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #ffff00"><%</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">@ page language</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">=</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">"</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">java</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">"</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">contentType</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">=</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">"</SPAN> <SPAN
style="COLOR: #000000; BACKGROUND-COLOR: #f5f5f5">text/html;
charset=utf-8</SPAN> <SPAN
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