Java Struts2 实现导出Excel文件

 第一篇技术文章，多多支持

现在开始

html代码：

<form action="userAction!exportExcel">
<input type="submit">导出</input>
</form>

struts.xml配置：

<package name="" namespace="/" extends="json-default">
        <action name="userAction" class="com.truth99.action.UserAction">
            <result name="excel" type="stream">
                <param name="encode">true</param>
                <param name="contentType">application/vnd.ms-excel;charset=GBK</param>
                <param name="inputName">excelStream</param>
                <param name="contentDisposition">attachment;filename=${fileName}</param>
                <param name="bufferSize">20480</param>
            </result>
        </action>
    </package>

<param name="encode">true</param> 允许编码

<param name="contentType">application/vnd.ms-excel;charset=GBK</param> 内容类型：就是excel，后面的charset是编码格式

<param name="inputName">excelStream</param> 输入流的名字定义，随便定义

<param name="contentDisposition">attachment;filename=${fileName}</param>输出时的文件名

java代码：

package com.truth99.action;

import java.io.ByteArrayInputStream;
import java.io.InputStream;

public class UserAction{

private InputStream excelStream;
private String fileName = "golf.xls";//导出excel

public String exportExcel(){
        try{
            StringBuffer sb = new StringBuffer();
            sb.append("title1").append("\t").append("title2").append("\n");
//\t表示下一列，\n表示下一行
//导入的数据进行迭代，拼成字符串
            for(;;){
                sb.append("content1").append("\t").append("content2").append("\n");
            }
//将字符串放入流中
            excelStream = new ByteArrayInputStream(sb.toString().getBytes("GBK"), 0, sb.toString().getBytes("GBK").length);
        }catch(Exception e){
        }
        return "excel";
    }
    public InputStream getExcelStream() {
        return excelStream;
    }
    public void setExcelStream(InputStream excelStream) {
        this.excelStream = excelStream;
    }
    public String getFileName() {
        return fileName;
    }
    public void setFileName(String fileName) {
        this.fileName = fileName;
    }
}

这样就完事儿了，挺简单的。