jsf Hssf 创建并下载 M$ Excel

jsf Hssf 创建并下载 M$ Excel

在jsf中通过FacesContext访问上下文；
Hssf通过 HSSFWorkbook 向输出流写入；
具体代码：

Bean：

public   class  TestBean  {
    public String action() {
        HSSFWorkbook wb = new HSSFWorkbook();
        FacesContext context=FacesContext.getCurrentInstance();
        HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
        response.reset();
        response.setContentType("application/ms-excel");
        try {
            response.setHeader("Content-disposition", "attachment;filename="+new String("下载Excel.xls".getBytes(),"iso-8859-1"));
            wb.write(response.getOutputStream());
        } catch (Exception e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        FacesContext.getCurrentInstance().responseComplete();
        return null;
    }
}

以上只是一个空的简单的Excel 具体怎么创建符合项目要求的参看：HSSF GUIDE！
faces-config.xml:

< managed-bean >
         < managed-bean-name > test </ managed-bean-name >
         < managed-bean-class > yds.study.web.TestBean </ managed-bean-class >
         < managed-bean-scope > session </ managed-bean-scope >
     </ managed-bean >

jsp：

< f:view >
     < h:form >
         < h:commandButton  id ="button"  value ="下载"  rendered ="true"
            action ="#{test123.action}"   />
     </ h:form >
</ f:view >

ok这样就可以了;)