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Struts文件上傳和下載

jsp

<%@ page language="java" contentType="text/html; charset=GBK" %>

<html>

<head>

</head>

<body>

<br>

<html:form action="/datamanage.data.upload.do" method="post" enctype="multipart/form-data" target="_parent">

<tr>

文件上傳

</td>

</tr>

<tr>

<td>

文件:

</td>

<td>

<html:file property="files" styleClass="text_2003"/>

</td>

</tr>

<tr>

<td>

描述:

</td>

<td>

</td>

</tr>

<tr>

</td>

</tr>

</html:form>

</body>

</html>

DataUploadForm

package eoms.datamanage.struts.form;

import eoms.common.base.BaseForm;

import org.apache.struts.upload.FormFile;

public class DataUploadForm extends BaseForm {

private FormFile files;

private String type_id;

private String data_path;

private String data_desc;

public String getType_id() {

return type_id;

}

public void setType_id(String type_id) {

this.type_id = type_id;

}

public FormFile getFiles() {

return files;

}

public void setFiles(FormFile file) {

this.files = file;

}

public String getData_path() {

return data_path;

}

public void setData_path(String data_path) {

this.data_path = data_path;

}

public String getData_desc() {

return data_desc;

}

public void setData_desc(String data_desc) {

this.data_desc = data_desc;

}

文件下載Action

package eoms.datamanage.struts.action;

import eoms.common.base.BaseAction;

import eoms.datamanage.dao.DataTypeDAO;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.*;

import java.net.URLEncoder;

public class DataDownAction extends BaseAction {

public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

DataTypeDAO typeDao = (DataTypeDAO) this.getBean("DataTypeDAO");

String type_id = request.getParameter("type_id");

String data_name = request.getParameter("data_name");

String path=typeDao.getDataTypeById(Integer.parseInt(type_id)).getData_path()+"/"+data_name;

BufferedInputStream bis = null;

BufferedOutputStream bos = null;

OutputStream fos = null;

InputStream fis = null;

String filepath = path;

System.out.println("文件路徑" + filepath);

File uploadFile = new File(filepath);

fis = new FileInputStream(uploadFile);

bis = new BufferedInputStream(fis);

fos = response.getOutputStream();

bos = new BufferedOutputStream(fos);

//這個就就是彈出下載對話框的關鍵代碼

response.setHeader("Content-disposition",

"attachment;filename=" + URLEncoder.encode(data_name,"GBK"));

int bytesRead = 0;

//用輸入流進行先讀，然后用輸出流去寫

byte[] buffer = new byte[8192];

while ((bytesRead = bis.read(buffer, 0, 8192)) != -1) {

bos.write(buffer, 0, bytesRead);

}

bos.flush();

fis.close();

bis.close();

fos.close();

bos.close();

return null;

}

文件上傳Action

package eoms.datamanage.struts.action;

import com.metarnet.security.model.User;

import eoms.common.Constants;

import eoms.common.base.BaseAction;

import eoms.datamanage.dao.DataDAO;

import eoms.datamanage.dao.DataTypeDAO;

import eoms.datamanage.model.DataModel;

import eoms.datamanage.model.DataTypeModel;

import eoms.datamanage.struts.form.DataUploadForm;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.upload.FormFile;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.HashMap;

import java.util.Map;

public class DataUploadAction extends BaseAction {

public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

User user = (User) request.getSession().getAttribute(

Constants.SESSION_USER_KEY);

DataTypeDAO typeDao = (DataTypeDAO) this.getBean("DataTypeDAO");

DataDAO dataDao = (DataDAO) this.getBean("DataDAO");

DataUploadForm theForm = (DataUploadForm) form;

FormFile file = theForm.getFiles();//取得上傳的文件

String filePath = theForm.getData_path();//上傳到指定的文件夾中

String fileDesc = theForm.getData_desc();

String type_id = theForm.getType_id();

try {

InputStream stream = file.getInputStream();//把文件讀入

OutputStream bos = new FileOutputStream(filePath + "/" +

file.getFileName());//建立一個上傳文件的輸出流

int bytesRead = 0;

byte[] buffer = new byte[8192];

while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {

bos.write(buffer, 0, bytesRead);//將文件寫入服務器

}

bos.close();

stream.close();

DataTypeModel typeModel = typeDao.getDataTypeById(Integer.parseInt(type_id));

//判斷是否已經存在

Map map = new HashMap();

map.put("type_code", typeModel.getData_type_code());

map.put("data_name", file.getFileName());

DataModel data = dataDao.getDataByTypeAndName(map);

if (data == null) {

//將資料信息保存進數據庫

DataModel model = new DataModel();

model.setData_type_code(typeModel.getData_type_code());

model.setData_name(file.getFileName());

model.setData_type(typeModel.getData_type_name());

model.setData_desc(fileDesc);

model.setData_author(user.getUserId());

dataDao.addNewData(model);

}

} catch (Exception e) {

System.err.print(e);

}

request.setAttribute("type_id", type_id);

return mapping.findForward("success");

}

posted on 2011-03-25 16:39 Mr.lu 閱讀(199) 評論(0) 編輯收藏

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