struts实现下载篇

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下载:

java 代码

public class DownLoadAction extends Action {
// --------------------------------------------------------- Instance
// Variables
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
// --------------------------------------------------------- Methods
/**
* Method execute
*
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
String downloadPath = servlet.getInitParameter("file-upload");
String fileName = new String(request.getParameter("filename").getBytes(
"ISO-8859-1"), "GB2312");
response.reset();
response.setContentType("application/x-msdownload");
response.addHeader("Content-Disposition", "attachment; filename=/""
+ new String(fileName.getBytes("GB2312"), "ISO-8859-1") + "/"");
try {
bis = new BufferedInputStream(new FileInputStream(downloadPath
+ "/" + fileName));
bos = new BufferedOutputStream(response.getOutputStream());
byte[] buff = new byte[20480];
while ((bis.read(buff, 0, buff.length)) != -1) {
bos.write(buff, 0, buff.length);
}
bos.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
bos.close();
bis.close();
}
return mapping.findForward("downloadfile");
}
}

web.xml

xml 代码

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/conf/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>config/login</param-name>
<param-value>/WEB-INF/conf/login/struts-config-login.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>file-upload</param-name>
<param-value>E:/upload</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>com.capinfo.filter.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Set Character Encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>/page/welcome.jsp</welcome-file>
</welcome-file-list>
<taglib>
<taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-template.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-template.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-tiles.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-nested.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-nested.tld</taglib-location>
</taglib>
</web-app>

struts-config

xml 代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<form-beans>
<form-bean name="uploadForm" type="com.capinfo.form.upload.UploadForm" />
</form-beans>
<global-forwards>
<forward name="welcome" path="/Welcome.do" />
<forward name="login" contextRelative="true" path="/login/Login.do" redirect="true" />
<forward name="upload" path="/page/upload.jsp" redirect="true"/>
</global-forwards>
<action-mappings>
<action path="/Welcome" type="org.apache.struts.actions.ForwardAction" parameter="/page/Welcome.jsp"></action>
<action path="/upload" type="com.capinfo.action.upload.UploadAction" name="uploadForm" input="/page/upload.jsp" scope="request">
<forward name="success" path="/page/upload.jsp" />
</action>
<action path="/downLoad"
type="com.yourcompany.struts.action.DownLoadAction"
input="/page/upload.jsp"
scope="request"
>
<forward name="downloadfile" path="/page/upload.jsp" />
</action>
</action-mappings>
<message-resources parameter="com.yourcompany.struts.ApplicationResources" />
</struts-config>

最后更新：2007-02-12 10:15

http://xuehongliang.javaeye.com/blog/53901

http://community.csdn.net/Expert/topic/4964/4964004.xml?temp=.5579492