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Struts2的上傳

Posted on 2012-02-28 11:24 viery 閱讀(251) 評論(0) 編輯收藏所屬分類: Struts2

Struts2自帶上傳下載的實現：
1.編寫輸入頁面和結果頁面
input.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP 'index.jsp' starting page</title>

<!--

-->

function addComponent()

{

var td=document.getElementById("files");

var br=document.createElement("<br>");

var input=document.createElement("input");

var button=document.createElement("input");

input.name="uploads";

input.type="file";

button.type="button";

button.value="刪除";

button.onclick=function(){

td.removeChild(br);

td.removeChild(input);

td.removeChild(button);

}

td.appendChild(br);

td.appendChild(input);

td.appendChild(button);

}

</script>

</head>

<body>

<br />

<form onsubmit="return true;" action="upload"

method="post" enctype="multipart/form-data">

<table>

<tr>

</td>

</tr>

</table>

</form>

<s:fielderror/>

</body>

</html>

js用于自動生成和控制刪除上傳控件的數量。
result.jsp

<body>
This a struts page. <br>
</body>

2.配置struts.xml

<?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">

<result>/result.jsp</result>

<result name="input">/upload.jsp</result>

<interceptor-ref name="fileUpload">

<param name="allowedTypes">application/vnd.ms-powerpoint</param>

</interceptor-ref>

<interceptor-ref name="defaultStack"></interceptor-ref>

</action>

</package>

</struts>

3實現action

package org.vle.action;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Iterator;

import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.Action;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {

private List<File> uploads;

private List<String> uploadsFileName;

private List<String> uploadsContentType;

public List<String> getUploadsContentType() {

return uploadsContentType;

}

public void setUploadsContentType(List<String> uploadsContentType) {

this.uploadsContentType = uploadsContentType;

}

public List<File> getUploads() {

return uploads;

}

public void setUploads(List<File> uploads) {

this.uploads = uploads;

}

public List<String> getUploadsFileName() {

return uploadsFileName;

}

public void setUploadsFileName(List<String> uploadsFileName) {

this.uploadsFileName = uploadsFileName;

}

@Override

public String execute() throws Exception {

for(int i=0;i<uploads.size();i++){

InputStream is=new FileInputStream(uploads.get(i));

String name=uploadsFileName.get(i);

String type=uploadsContentType.get(i);

System.out.println(type);

String path=ServletActionContext.getRequest().getRealPath("/temp");

File f=new File(path,name);

File temp=new File(path);

if(!temp.exists()){

temp.mkdirs();

}

OutputStream os=new FileOutputStream(f);

byte[] b=new byte[1024];

int len;

while((len=is.read(b))>0){

os.write(b, 0, len);

}

os.close();

is.close();

}

return Action.SUCCESS;

}

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