JSP開發(fā)之Struts2實現下載功能的實例
1、Action 類
package com.favccxx.strutsdemo;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import com.opensymphony.xwork2.ActionSupport;
public class DownloadAction extends ActionSupport {
private static final long serialVersionUID = -7758584364932001138L;
private InputStream inputStream;
@Override
public String execute() throws Exception {
inputStream = new FileInputStream(new File("D:\\芒果豆.jpg"));
return SUCCESS;
}
public InputStream getInputStream() {
return inputStream;
}
public void setInputStream(InputStream inputStream) {
this.inputStream = inputStream;
}
}
2、struts.xml
?xml version="1.0" encoding="UTF-8" ?>
!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
struts>
constant name="struts.enable.DynamicMethodInvocation" value="false" />
constant name="struts.devMode" value="true" />
package name="default" namespace="/" extends="struts-default">
default-action-ref name="index" />
global-results>
result name="error">/error.jsp/result>
/global-results>
global-exception-mappings>
exception-mapping exception="java.lang.Exception" result="error"/>
/global-exception-mappings>
action name="index">
result type="redirectAction">
param name="actionName">HelloWorld/param>
param name="namespace">/example/param>
/result>
/action>
action name="download" class="com.favccxx.strutsdemo.DownloadAction">
result name="success" type="stream">
param name="contentType">application/octet-stream/param>
param name="inputName">inputStream/param>
param name="contentDisposition">attachment;filename="mongo.jpg"/param>
param name="bufferSize">1024/param>
/result>
/action>
/package>
/struts>
3、web.xml
?xml version="1.0" encoding="UTF-8"?>
web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
display-name>Struts Blank/display-name>
filter>
filter-name>struts2/filter-name>
filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter/filter-class>
/filter>
filter-mapping>
filter-name>struts2/filter-name>
url-pattern>/*/url-pattern>
/filter-mapping>
welcome-file-list>
welcome-file>index.html/welcome-file>
/welcome-file-list>
/web-app>
4、JSP
a href="/download" rel="external nofollow" >無注解下載/a>
以上就是JSP實現下載功能的實例代碼，如有疑問請留言或者到本站社區(qū)交流討論，感謝閱讀，希望能幫助到大家，謝謝大家對本站的支持！
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