struts2 下载文件

作者：ThirdteenDevil

qq : 181907667

 

struts2配置文件 struts.xml

<action name="download" class="fileDownloadAction">  
        <result name="success" type="stream">  
               
            <!-- 下载文件类型 -->  
            <param name="contentType">${contentType}</param>  
                   
            <!-- 文件名 -->  
            <param name="contentDisposition">filename="${fileName}"</param>  
               
            <param name="inputName">downloadFile</param>  
  
        </result>  
</action>  

 fileDownloadAction是spring配置文件application.xml中配置的bean
${contentType}是下载的文件类型,在fileDownloadAction中配置getter方法来设置
${fileName}是下载文件弹出框显示的文件名,在fileDownloadAction中配置getter方法来设置
downloadFile是用来翻转找到getDownloadFile方法来获取字节流

 

Spring框架配置文件 application.xml

在spring中集成struts2

<bean name="fileDownloadAction" class="com.thd.action.download.FileDownLoadAction" scope="prototype">
	<property name="ds">
		<ref bean="downloadServiceImpl"/>
	</property>
</bean>

 

struts的action代码

package com.thd.action.download;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;
import com.thd.pojo.download.Download;
import com.thd.service.download.DownloadService;
import com.thd.util.ReadPro;

public class FileDownLoadAction extends ActionSupport {
	
	private DownloadService ds;
	private String fileName;
	private String contentType;
	
	
	public String getContentType() {
		String id = ServletActionContext.getRequest().getParameter("id");
		Download dl = this.getDs().queryById(id);
		System.out.println(dl.getType());
		return dl.getType();
	}

	public String getFileName() throws Exception{
		String id = ServletActionContext.getRequest().getParameter("id");
		Download dl = this.getDs().queryById(id);
		fileName = dl.getFileName();
		fileName = new String(fileName.getBytes(), "ISO-8859-1");
		return fileName;
	}

	
	public InputStream getDownloadFile()
	{
		String id = ServletActionContext.getRequest().getParameter("id");
		Download dl = this.getDs().queryById(id);
		ReadPro rp = new ReadPro();
		String path = rp.read("uploadPath") + dl.getPath() + File.separator + id + dl.getFix();
		
		
		int BUFFER_SIZE = 16 * 1024;
		InputStream in = null;
		try{
			in = new BufferedInputStream(new FileInputStream(new File(path)), BUFFER_SIZE);
		}catch(Exception e){
			e.printStackTrace();
		}
		System.out.println(in);
		return in;
	}

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

	public DownloadService getDs() {
		return ds;
	}
	public void setDs(DownloadService ds) {
		this.ds = ds;
	}
}	

 页面 

<a target="_blank" href="download.action?id=<s:property value="id"/>">  
    <s:property value="path"/>\<s:property value="id"/><s:property value="fix"/>                             
</a>