第31講 .struts2檔案下載
阿新 • • 發佈：2018-11-11
1在專案中，HeadFirstStruts2chapter08，新建fileDownLoadAction，getInputStream()方法名是固定的；this.fileName="OtherMaterials.zip";再struts.xml中會用來取值，
package com.cruise.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import org.apache.commons.io.FileUtils;
import
public class FileDownloadAction extends ActionSupport{
private String fileName;
public String getFileName() {
return fileName;
}
public
this.fileName = fileName;
}
public InputStream getInputStream()throws Exception{
File file = new
this.fileName="OtherMaterials.zip";
return new FileInputStream(file);
}
}
2配置struts.xml檔案，${fileName}這裡呼叫action中的getFileName()方法
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.multipart.maxSize" value="20000000"></constant>
<package name="manager" extends="struts-default">
<action name="fileDownLoad" class="com.cruise.action.FileDownloadAction">
<result type="stream" >
<param name="contentDisposition">attachment;filename=${fileName}</param>
</result>
</action>
</package>
</struts>
3fileDownload.jsp ,檔案，
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="fileDownLoad" >檔案下載</a>
</body>
</html>
4測試
http://localhost:8080/HeadFirstStruts2chapter08/fileDownload.jsp
5解決下載的檔名亂碼的問題，FileDownloadAction 修改getFileName()方法
package com.cruise.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import org.apache.commons.io.FileUtils;
import com.opensymphony.xwork2.ActionSupport;
public class FileDownloadAction extends ActionSupport{
private String fileName;
public String getFileName()throws Exception {
fileName= new String(fileName.getBytes(),"ISO8859-1");
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public InputStream getInputStream()throws Exception{
File file = new File("C:/Users/pengc/Desktop/材料.zip");
this.fileName="檔案.zip";
return new FileInputStream(file);
}
}
6測試
http://localhost:8080/HeadFirstStruts2chapter08/fileDownload.jsp