java_web总结（一）

1、struts1ajax返回值

	public ActionForward preChangeAccountPwd(ActionMapping mapping,
			ActionForm form, HttpServletRequest request,
			HttpServletResponse response) throws Exception {
               // 向页面返回添加帐号结果
		response.setCharacterEncoding("UTF-8");
		response.setContentType("text/html; charset=UTF-8");
		PrintWriter  pw = response.getWriter();
		pw.write(result);
		pw.close();
                return null;
}

2、excle

response.setHeader("Content-disposition","attachment;filename=temp.xls");
response.setContentType("application/octet-stream");
ServletOutputStream os = response.getOutputStream();
NetWorkForm uf = (NetWorkForm)form;
FormFile ff = uf.getNetFile();
InputStream in = ff.getInputStream();
HSSFWorkbook wb = new HSSFWorkbook(in);
HSSFSheet sheet = wb.getSheetAt(0);
int rowNum = sheet.getLastRowNum();
×
×
workbook.write(os);
os.close();
in.close();
return null;
========================
OutputStream os = response.getOutputStream();
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition", "attachment; filename="+ fileName+ ".xls");
// 第一步，创建一个webbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
×
×
wb.write(os);
os.close();
response.setContentType("text/xml;charset=utf-8");
return null;