Question

struts2如何用注解的方式实现文件上传

Answer 1

使用jexcel生成excel，使用annotations配置下载的参数。

@Results( { @Result(name = "download", type = "stream", params = { "contentType", "application/vnd.ms-excel",
"inputName", "inputStream", "contentDisposition", "attachment;filename=\"${downloadFileName}\"", "bufferSize",
"4096" }) })
public class DownLoad2Action extends ActionSupport{
public static final String DOWNLOAD = "download";
private String fileName;// 初始的通过param指定的文件名属吵隐性

public String getFile() throws Exception{
setFileName("add的.xls");
return “download”;
}

public InputStream getInputStream() throws Exception {
WritableWorkbook workbook = Workbook.createWorkbook(new File("d:\\a.xls"));
WritableSheet sheet = workbook.createSheet("测试", 0);

Label label = new Label(0, 0, "hello world 从");
sheet.addCell(label);

workbook.write();
workbook.close();

return new FileInputStream(new File("d:\\a.xls"));
}

/** 提供转换编码后的供下载用的文件名 */
public String getDownloadFileName() {
String downFileName = fileName;
try {
downFileName = new String(downFileName.getBytes(), "ISO8859-1");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return downFileName;
}

public void setFileName(String fileName) {
this.fileName = fileName;
}

}

访问的URL：down-load2!getFile.action
params 中使用键值对进行设置：key1，value1，key2，value2.....；对应response相乎碰唯应头信岁培息