闲来无事做的一个小例子:

java 代码

public class TestOpenExcel extends HttpServlet {
private static final String url = "D:/test.xls";
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
/**
* setContentType设置MIME类型，Acrobat
* PDF文件为"application/pdf"，WORD文件为："application/msword"，
* EXCEL文件为："application/vnd.ms-excel"。
*/
response.setContentType("application/vnd.ms-excel");
/**
* setHeader设置打开方式，具体为：inline为在浏览器中打开，attachment单独打开。
*/
response.setHeader("Content-disposition", "inline;filename="" + "test.xls"+ "";");
ServletOutputStream sos = response.getOutputStream();
FileInputStream fis = new FileInputStream(url);
BufferedOutputStream bos = new BufferedOutputStream(sos);
byte[] bytes = new byte[8192];
bos.write(bytes, 0, fis.read(bytes));
fis.close();
sos.close();
bos.close();
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}

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用java在IE中打开Excel