struts2输出并下载excel文件

Action文件：

[c-sharp] view
plaincopy

package com.credit.stats.model;  

import com.opensymphony.xwork2.ActionSupport;  

import org.apache.poi.hssf.usermodel.HSSFCell;  

import org.apache.poi.hssf.usermodel.HSSFRow;  

import org.apache.poi.hssf.usermodel.HSSFSheet;  

import org.apache.poi.hssf.usermodel.HSSFWorkbook;  

import org.apache.struts2.interceptor.ServletRequestAware;  

import org.apache.struts2.interceptor.ServletResponseAware;  

import javax.servlet.http.HttpServletRequest;  

import javax.servlet.http.HttpServletResponse;  

import java.io.ByteArrayInputStream;  

import java.io.ByteArrayOutputStream;  

import java.io.InputStream;  

import java.util.ArrayList;  

import java.util.List;  

/** 

 * Created by IntelliJ IDEA. 

 * User: 晃同 

 * Date: 2010-10-14 

 * Time: 15:31:38 

 * To change this template use File | Settings | File Templates. 

 */  

public class OutputExcelAction extends ActionSupport implements ServletRequestAware, ServletResponseAware{  

    protected HttpServletRequest request = null;  

    protected HttpServletResponse response = null;  

    public void setServletRequest(HttpServletRequest arg0) {  

        this.request = arg0;  

    }  

    public void setServletResponse(HttpServletResponse arg0) {  

        this.response = arg0;  

    }  

    //获取输出流  

    public InputStream getInputExcel()  

    {  

        return (InputStream)request.getAttribute("excelStream");  

    }  

    @Override  

    public String execute() throws Exception {  

            List<String> list = new ArrayList<String>();  

            list.add("张三");  

            list.add("李四三");  

            if(list != null){  

                 int rows=0;  

                 HSSFWorkbook wk = new HSSFWorkbook();  

                 HSSFSheet sheet = wk.createSheet("FollowAgentStats");  

                 HSSFRow row = sheet.createRow(rows++);  

                 int column=0;  

                 HSSFCell cell = row.createCell(column++,HSSFCell.CELL_TYPE_STRING);  

                 cell.setCellValue("序号");  

                 cell = row.createCell(column++,HSSFCell.CELL_TYPE_STRING);  

                 cell.setCellValue("姓名");  

                 for(String ls:list){  

                     row = sheet.createRow(rows++);  

                     column=0;  

                     cell = row.createCell(column++,HSSFCell.CELL_TYPE_NUMERIC);  

                     cell.setCellValue(rows - 1);  

                     cell = row.createCell(column++,HSSFCell.CELL_TYPE_STRING);  

                     cell.setCellValue(ls);  

                 }  

                 try{  

                     ByteArrayOutputStream out=new ByteArrayOutputStream();  

                     wk.write(out);  

                     request.setAttribute("excelStream",new ByteArrayInputStream(out.toByteArray()));  

                     request.setAttribute("filename", "myexcel");//设置文件名  

                     return SUCCESS;  

                 }catch(Throwable th){  

                     th.printStackTrace();  

                     System.out.println("无法输出Excel文件");  

                     return ERROR;  

                 }  

            }else{  

                System.out.println("统计数据不存在");  

                return ERROR;  

            }  

    }  

}  

 

struts文件:

[xhtml] view
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<action name="download" class="OutputExcelAction">              

    <result name="success" type="stream">  

        <param name="contentType">application/vnd.ms-excel</param>  

        <param name="inputName">inputExcel</param>  

        <param name="contentDisposition">attachment;filename="${#request['filename']}"</param>  

        <param name="bufferSize">8192</param>  

    </result>  

</action>