不要再说用<a>标签下载了,这个会把文件打开而不是下载
例如:
<a href="E:\MyDesktop\37fecd65330184de67d419a8d02e7081.jpg">下载</a>
如果我这样写,浏览器就会把图片直接打开,除非是一个浏览器打不开的文件
所以我们还是要用到java本身的文件读写来进行文件的下载
<a href="downloadFile?filename=<s:property value='document_filename'/>">下载</a>
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package com.cpsec.tang.chemical.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.List;
import java.util.Random;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import org.springframework.stereotype.Controller;
import com.cpsec.tang.chemical.biz.DocumentBiz;
import com.cpsec.tang.chemical.entity.Document;
import com.cpsec.tang.chemical.util.Pager;
import com.opensymphony.xwork2.ActionSupport;
@Controller ( "documentAction" )
public class DocumentAction extends ActionSupport{ private String filename;
public String downloadFile(){
System.out.println(filename);
try {
HttpServletResponse response=ServletActionContext.getResponse();
//设置文件MIME类型
response.setContentType(ServletActionContext.getServletContext().getMimeType(filename));
//设置Content-Disposition
response.setHeader( "Content-Disposition" , "attachment;filename=" +filename);
//获取目标文件的绝对路径
String fullFileName = ServletActionContext.getServletContext().getRealPath( "/files/" + filename);
//System.out.println(fullFileName);
//读取文件
InputStream in = new FileInputStream(fullFileName);
//读取目标文件,通过response将目标文件写到客户端
OutputStream out = response.getOutputStream();
//写文件
int b;
while ((b=in.read())!= - 1 )
{
out.write(b);
}
in.close();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
return SUCCESS;
}
}
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感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
原文链接:http://www.cnblogs.com/bunuo/p/download.html