web上传下载
提示存储地址的下载
public ActionForward exportExcel(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {
String path;
//创建临时文件夹
path=request.getContextPath()+"\\shopCart";
new File(path).mkdirs();
//创建临时文件,存放需要下载的内容
path=path+"\\"+new Date().getTime()+".xls";
File file = new File(path);
//设置头信息，声明文件类型，文件默认名称
response.setContentType("application/msexcel");
response.setHeader("content-disposition", "attachment; filename=order_"+new Date().getTime()+".xls");
//读取临时文件内容，将内容写到客户端
OutputStream os;
try {
os = response.getOutputStream();
java.io.BufferedInputStream bis = new java.io.BufferedInputStream(new java.io.FileInputStream(file));
byte[] readdata = new byte[1024];
while (bis.read(readdata) != -1) {
os.write(readdata);
}
os.flush();
os.close();
bis.close();
//将临时文件删除
file.delete();
response.sendRedirect("/ecman/searchMerchandise.jsp");
} catch (IOException e1) {
e1.printStackTrace();
}
return null;
基于struts 上传操作
首先請確定commons-fileupload.jar有在WEB-INF/lib目錄下。
FormBean:
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.*;
public class UploadForm extends ActionForm {
private FormFile file;
public void setFile(FormFile file) {
this.file = file;
}
public FormFile getFile() {
return file;
}
public void reset(ActionMapping mapping, HttpServletRequest req) {
file = null;
}
}
使用struts及html标签
<html:form action= "/cart.do" method= "post" enctype= "multipart/form-data">
<html:hidden property="status" value="importExcel"/> 文件路径： <html:file property= "excelFile"/> <input type="submit" value="上传"/> </html:form> <form action="/cart.do" method="post" enctype="multipart/form-data" name="excelForm"> <input type="hidden" name="status" value="importExcel"/> 文件路径：<input name="excelFile" type="file" id="excelFile"/> <input type="submit" name="Submit" value="提交"/> </form>
ction:
import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.*;
public class UploadAction extends Action {
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
UploadForm fileForm = (UploadForm) form;
FormFile file = fileForm.getFile();
FileOutputStream fileOutput = new FileOutputStream( "/home/caterpillar/files/ " + file.getFileName());
fileOutput.write(file.getFileData());
fileOutput.flush();
fileOutput.close();
return mapping.findForward( "success ");
}
}