Question

我采用了一种出口xls文档的方法。这种方法是正确的,但在被迫害后,我就得了。

面对: 在做出回应后无法取得进展

Here is the method:

public String exportXls() {
    OutputStream out = null;
    try {
        FacesContext cxt = FacesContext.getCurrentInstance();
        ExternalContext context = cxt.getExternalContext();
        HttpServletResponse response = (HttpServletResponse) context.getResponse();
        response.setContentType("application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment; filename=name.xls");
        out = response.getOutputStream();

        WritableWorkbook workbook = createWorkbook(response);

        // All sheets and cells added. Now write out the workbook
        workbook.write();
        workbook.close(); 
        System.out.println("XLS written!");
    } catch(Exception ex) {
        logger.error("ERROR OCCURRED WITH exportXls" + ex.toString());
    } finally {
        try {
            if (out != null) out.close();
        } catch(IOException e) {
            logger.error(e);
            e.printStackTrace();
        }
    }
    return "page";
}

页: 1 你们认为什么是问题?

Answer 1

你们需要告诉共同基金,你已经通过电话

public void exportXls() {
    // ...

    FacesContext.getCurrentInstance().responseComplete();
}

<>与具体问题无关>,我强烈建议删除<>。 http://www.un.org/Depts/DGACM/index_chinese.htm 该代码可以投下IOException。你们应该把这一例外推到墙上,但让集装箱处理。这还允许通过<代码>Filter进行更集中的例外记录。

Answer 2

You cannot forward (or redirect) once there s been content output to the client.

你重新尝试做些什么,相当于为单一申请获得两项回复,或翻一番,但不是两页。

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