struts2 实现文件上传下载 (下载支持中文文件名)代码

struts2 实现文件上传：

Action 代码：

package com.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class FileUploadAction extends BaseAction{

	/**
	 *
	 */
	private static final long serialVersionUID = 1L;

	/**
	 * 上传后存放在临时文件夹里的文件
	 */
	private File <span style="color:#ff0000;">file;</span>

	/**
	 * 文件名称
	 */
	private String <span style="color:#ff0000;">fileFileName</span>;

	/**
	 * 文件的MIME类型
	 */
	private String<span style="color:#ff0000;"> fileContentType</span>;

	/**
	 * 保存的路径
	 */
	private String savePath;

	public String getSavePath() {
		return savePath;
	}

	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}

	public File getFile() {
		return file;
	}

	public void setFile(File file) {
		this.file = file;
	}

	public String getFileFileName() {
		return fileFileName;
	}

	public void setFileFileName(String fileFileName) {
		this.fileFileName = fileFileName;
	}

	public String getFileContentType() {
		return fileContentType;
	}

	public void setFileContentType(String fileContentType) {
		this.fileContentType = fileContentType;
	}

	public String execute() throws Exception
	{

		 String root = ServletActionContext.getServletContext().getRealPath(savePath);

	        InputStream is = new FileInputStream(file);

	        OutputStream os = new FileOutputStream(new File(root, fileFileName));

	        byte[] buffer = new byte[500];
	        @SuppressWarnings("unused")
			int length = 0;

	        while(-1 != (length = is.read(buffer, 0, buffer.length)))
	        {
	            os.write(buffer);
	        }

	        os.close();
	        is.close();

	        return SUCCESS;

	}

}

struts2.xml配置信息：

<?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>

	<package name="fileUpload" extends="struts-default" namespace="/">

		<action name="fileUpload_*" class="com.action.FileUploadAction" method="{1}">

          <param name="savePath">/upload</param> //注意在当前工程里建一个 upload文件夹

		<result>
			/login.jsp
		</result>

		 </action>

	</package>
</struts>

文件上传的 jsp 页面：

	<form action="fileUpload.action" method="post" enctype="multipart/form-data">
        file: <input type="file" name="file"/><br>
        <input type="submit" value="submit"/>
    </form>

struts2实现文件下载源码：支持中文文件名

注意：下载文件的大小设置问题，默认是2M. 可以在struts.properties 设置  struts.multipart.maxSize=10485760 （10M 大小根据自己情况）

action 的代码：

package com.action;

import java.io.IOException;
import java.io.InputStream;
import org.apache.struts2.ServletActionContext;

public class FileDownloadAction extends BaseAction{

	/**
	 *
	 */
	private static final long serialVersionUID = 1L;
	/**
	 * 文件名称
	 */
	private String fileName;

	public String getFileName() throws IOException {

		<span style="color:#ff0000;">return  new String(fileName.getBytes(), "ISO8859-1"); //转码 使其支持中文，不然无法显示文件名的中文字符</span>
	}

		public void setFileName(String fileName) {

				this.fileName = fileName;;

		}

		 public InputStream getInputStream() throws Exception{

			 return ServletActionContext.getServletContext().getResourceAsStream( fileName);

			   }

			    public String execute()throws Exception{
					return SUCCESS;
				}
}

下载的 struts2.xml配置信息：

<action name="download" class="com.action.FileDownloadAction">

			<result type="stream" name="success">
				<param name="contentDisposition">attachment;fileName="${fileName}"</param>
				<param name="contentType">application/octet-stream;charset=ISO8859-1</param>
				<param name="inputName"><span style="color:#ff0000;">InputStream</span></param> //InputStream 是有Action中的<span style="font-family: Arial; font-size: 14px; line-height: 26px;">getInputStream()方法 去掉get而定的，要一致</span>
				<param name="bufferSize">10485760</param>//文件大小（10M）
			</result>

	</action>

jsp页面：

<a href="download.action?fileName=upload/铭记11er.mp3">点击下载</a>