速動畫教程第二十二集 使用Struts上傳文件
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制作環(huán)境：
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Eclipse3.1.1? 、 MyEclipse4.1? 、 Tomcat5.5.x
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步驟：
??? 新建工程 upload
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??? 添加 Struts 框架，使用 Struts1.2 版本
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??? 新建 一個 jsp + action 這里將使用動態(tài)的 ActionForm
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??? 在新建表單對像時使用一個文件名和一個文件對像進(jìn)行提交
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??? 修改動態(tài) From 的類型為
org.apache.struts.upload.FormFile
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???
<
form-bean
name
=
"upfileForm"
type
=
"org.apache.struts.action.DynaActionForm"
>
?????
<
form-property
name
=
"filename"
type
=
"java.lang.String"
/>
?????
<
form-property
name
=
"filedata"
type
=
"java.lang.String"
/>
???
</
form-bean
>
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???
改為
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???
<
form-bean
name
=
"upfileForm"
type
=
"org.apache.struts.action.DynaActionForm"
>
?????
<
form-property
name
=
"filename"
type
=
"java.lang.String"
/>
?????
<
form-property
name
=
"filedata"
type
=
"
org.apache.struts.upload.FormFile
"
/>
???
</
form-bean
>
?
???
修改 upfile.jsp 文件，在<Form> 中加入
enctype
=
"multipart/form-data"
，這樣才可以提交二進(jìn)制類型的文件
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??? 修改文件第一行代碼
??????
<%@
page
language
=
"java"
%>
??????
改為
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<%@
page
contentType
=
"text/html;charset=UTF-8"
language
=
"java"
%>
??????
這里將使用 UTF-8 的編碼格式
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??? 修改
upfileAction.java
文件，修改后的內(nèi)容如下：
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package com.test.struts.action;
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import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
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import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.upload.FormFile;
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/**
?* MyEclipse Struts
?* Creation date: 07-05-2006
?*
?* XDoclet definition:
?* @struts.action path="/upfile" name="upfileForm" input="/upfile.jsp" scope="request" validate="true"
?*/
public class UpfileAction extends Action {
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??? // --------------------------------------------------------- Instance Variables
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??? // --------------------------------------------------------- Methods
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??? /**
???
?* Method execute
???
?* @param mapping
???
?* @param form
???
?* @param request
???
?* @param response
???
?* @return ActionForward
???
?*/
??? public ActionForward execute(
?????? ActionMapping mapping,
?????? ActionForm form,
?????? HttpServletRequest request,
?????? HttpServletResponse response) {
?????? DynaActionForm upfileForm = (DynaActionForm) form;
?????? //
聲明并獲取對像
??????????????????
String filename = upfileForm.getString("filename");
??????? // 輸出文件名
??????????????????
System.out.println(filename);
??????? FormFile filedata = (FormFile) upfileForm.get("filedata");
??????? // 取當(dāng)前系統(tǒng)路徑
??????????????????
String filePath = request.getRealPath("/");
??????? try {
??????????? // 轉(zhuǎn)換文件為數(shù)據(jù)流
???????????????????????????
InputStream stream = filedata.getInputStream();
??????????? // 建立輸出流
???????????????????????????
OutputStream bos = new FileOutputStream(filePath + "/" +
??????????????????? filedata.getFileName());
??????????? // 將文件寫入網(wǎng)站根目錄下
???????????????????????????
int bytesRead = 0;
???
??????? byte[] buffer = new byte[8192];
???
??????? while ( (bytesRead = stream.read(buffer, 0, 8192)) != -1) {
???
???????
bos.write(buffer, 0, bytesRead);
???
??????? }
???
??????? bos.close();
???
??????? stream.close();
??????? } catch (FileNotFoundException e) {
??????????? // TODO Auto-generated catch block
??????????? e.printStackTrace();
??????? } catch (IOException e) {
??????????? // TODO Auto-generated catch block
??????????? e.printStackTrace();
??????? }
??????? // 返回到提交頁面
??????????????????
return mapping.getInputForward();
??? }
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}
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???
現(xiàn)在可以進(jìn)行測試了
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??? 這時將會發(fā)現(xiàn)，提交的文件及文件名稱都是亂碼！下面將解決亂碼
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??? 增加一個過濾器，過濾器的代碼請查看包中的具體文件
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??? 在
web.xml
文件中加入以下配置內(nèi)容，過濾器的編碼設(shè)置為
UTF-8
??????
<
filter
>
??????
<
filter-name
>
Set Character Encoding
</
filter-name
>
??????
<
filter-class
>
com.test.SetCharacterEncodingFilter
</
filter-class
>
??????
<
init-param
>
??????????
<
param-name
>
encoding
</
param-name
>
??????????
<
param-value
>
UTF-8
</
param-value
>
??????
</
init-param
>
???
</
filter
>
???
<
filter-mapping
>
??????
<
filter-name
>
Set Character Encoding
</
filter-name
>
??????
<
url-pattern
>
/*
</
url-pattern
>
???
</
filter-mapping
>
???
<
filter-mapping
>
??????
<
filter-name
>
Set Character Encoding
</
filter-name
>
??????
<
servlet-name
>
action
</
servlet-name
>
???
</
filter-mapping
>
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??? 配置 Tomcat 的 server.xml 文件，文件在 Tomcat_Home/conf 中
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??? 在端口配置的前面加入 URIEncoding="UTF-8" 如果使用了和IIS集成的話需要在 8009 的端口前也加入此配置內(nèi)容，關(guān)于詳細(xì)的和IIS集成方法和亂碼解決請查看第二十一集的錄像
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??? 現(xiàn)在重新啟動服務(wù)，測試
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??? 一切正常！
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??? 本集教程到些結(jié)束！！！