[转]java struts2+jxl生成并导出Excel

1.所需jar包

struts2需要jar包：commons-logging.jar、freemarker-2.3.8.jar、ognl-2.6.11.jar、struts2-core-2.0.11.1.jar、xwork-2.0.4.jar

excel导出：jxl.jar

2.配置
web.xml

.....            
             <filter>  
    <filter-name>struts2</filter-name>  
    <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>  
</filter>  
<filter-mapping>  
    <filter-name>struts2</filter-name>  
    <url-pattern>/*</url-pattern>  
</filter-mapping>  
 ......

struts.xml

<?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="platform-default" extends="struts-default">  
        <action name="excel" class="action.ExcelAction">  
            <result name="excel" type="stream">  
                <param name="contentType">  
                    application/vnd.ms-excel  
                </param>  
                <param name="inputName">excelStream</param>  
                <param name="contentDisposition">  
                    filename="export.xls"  
                </param>  
                <param name="bufferSize">1024</param>  
            </result>  
        </action>  
    </package>  
</struts>

Action

package action;  

import java.io.InputStream;  
import service.IExcelService;  
import service.impl.ExcelServiceImpl;  
public class ExcelAction {  

    InputStream excelStream;  

    public String execute(){  
        IExcelService es = new ExcelServiceImpl();  
        excelStream = es.getExcelInputStream();  
        return "excel";  
    }  
    //get set...  
}

Service

package service;  
import java.io.InputStream;  
public interface IExcelService {  
    InputStream getExcelInputStream();  
}

实现类

package service.impl;  

import java.io.ByteArrayInputStream;  
import java.io.ByteArrayOutputStream;  
import java.io.InputStream;  
import java.io.OutputStream;  

import jxl.Workbook;  
import jxl.write.WritableSheet;  
import jxl.write.WritableWorkbook;  
import service.IExcelService;  

public class ExcelServiceImpl implements IExcelService {  

    @Override  
    public InputStream getExcelInputStream() {  
        //将OutputStream转化为InputStream  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        putDataOnOutputStream(out);  
        return new ByteArrayInputStream(out.toByteArray());  
    }  

    private void putDataOnOutputStream(OutputStream os) {  
        jxl.write.Label label;  
        WritableWorkbook workbook;  
        try {  
            workbook = Workbook.createWorkbook(os);  
            WritableSheet sheet = workbook.createSheet("Sheet1", 0);  

            label = new jxl.write.Label(0, 0, "struts2导出excel");  
            sheet.addCell(label);  

            workbook.write();  
            workbook.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
}

访问：http://127.0.0.1:8080/JXL_excel/excel.action 就可以导出excel

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