java附件上傳,如何以附件的形式上傳

本文目錄一覽：

• 1、上傳附件 java 代碼
• 2、java附件上傳功能，上傳的附件要根據時間來重命名，上傳的路徑保存在服務器指定目錄根據年月來分的目錄里
• 3、java 上傳附件實現方法

上傳附件 java 代碼

SmartUpload上傳圖片

記得下載jar包啊

別忘了把名改成smartUpload.jar

Utility類：

package com.tidyinfo.utils;

import java.util.Calendar;

public class Utility {

//生成形如:\2006\08\18的路徑

private String path;

//生成形如: 20060818125012的唯一id號

private String id;

//生成形如：/2006/08/18的路徑

private String url;

private String hour;

private String year;

private String month;

private String day;

private String minate;

private String second;

/** Creates a new instance of Utility */

public Utility() {

this.year =new Integer(Calendar.getInstance().get(Calendar.YEAR)).toString();

this.month = parseToString(Calendar.getInstance().get(Calendar.MONTH)+1);

this.day = parseToString(Calendar.getInstance().get(Calendar.DAY_OF_MONTH));

this.hour = parseToString(Calendar.getInstance().get(Calendar.HOUR_OF_DAY));

this.minate = parseToString(Calendar.getInstance().get(Calendar.MINUTE));

this.second = parseToString(Calendar.getInstance().get(Calendar.SECOND));

this.setId();

this.setPath();

this.setUrl();

}

protected String parseToString(int i){

return i10?(“0″+i):new Integer(i).toString();

}

public String getId(){

return this.id;

}

public String getPath(){

return this.path;

}

public String getUrl(){

return this.url;

}

protected void setId(){

this.id = this.year+this.month+this.day+this.hour+this.minate+this.second;

}

protected void setPath(){

this.path = “\\”+this.year + “\\” + this.month + “\\” +

this.day ;

}

protected void setUrl(){

this.url = this.path.replace(‘\\’,’/’);

}

}

Action：（根據不同情況要更改相關代碼）

User userForm = new User();

String result = new String();

SmartUpload su = new SmartUpload();

//文件名

String filename = new String();

//文件擴展名

String fileext = new String();

//文件上傳後存儲的路徑

String path = request.getRealPath(request.getContextPath());

path = path.substring(0,path.lastIndexOf(“\\”));

path += “\\images”;

//圖片的url

String url = new String();

//創建文件夾

java.io.File file = new java.io.File(path);

file.mkdirs();

try{

// 上傳初始化

su.initialize(this.servlet.getServletConfig(),request,response);

//設定上傳限制

//1.限制每個上傳照片的最大長度。

su.setMaxFileSize(5000000);

//2.限制總上傳數據的長度。

su.setTotalMaxFileSize(10000000);

//3.設定允許上傳的照片（通過擴展名限制）。

su.setAllowedFilesList(“jpg,gif,GIF,JPG”);

//上傳照片

su.upload();

//獲得請求的表單數據

String username = su.getRequest().getParameter(“username”);//username

String password = su.getRequest().getParameter(“password”);//password

String sex = su.getRequest().getParameter(“sex”);//sex

String email =su.getRequest().getParameter(“email”);//email

String apwd =su.getRequest().getParameter(“apwd”);//question of password

String rpwd =su.getRequest().getParameter(“rpwd”);//anser of password

userForm.setUsername(username);

userForm.setPassword(password);

userForm.setSex(sex);

userForm.setEmail(email);

userForm.setApwd(apwd);

userForm.setRpwd(rpwd);

//將上傳照片全部保存到指定目錄

if(!su.getFiles().getFile(0).isMissing()){

su.save(path,su.SAVE_PHYSICAL);

//文件名

filename = su.getFiles().getFile(0).getFileName();

//得到擴展名

fileext = su.getFiles().getFile(0).getFileExt();

//給圖片改名，命名形如：20060814135411.gif

Utility u = new Utility();

String newName = u.getId()+”.”+fileext;

java.io.File oldFile = new java.io.File(path+”\\”+filename);

java.io.File newFile = new java.io.File( path + “\\”+newName);

//上傳圖片的url

url = request.getContextPath()+”/images/”+newName;

if(oldFile!=null){

oldFile.renameTo(newFile);

}else{

result+=”命名出錯！”;

}

System.out.println(“0000000000000000000″+filename);

System.out.println(“0000000000000000000″+path+”\\”+newName);

System.out.println(“0000000000000000000″+url);

System.out.println(result);

}

}catch(com.jspsmart.upload.SmartUploadException e){

result += “file出錯信息：”;

result += e.getMessage();

System.out.println(result);

}

java附件上傳功能，上傳的附件要根據時間來重命名，上傳的路徑保存在服務器指定目錄根據年月來分的目錄里

如果使用框架的話，比如 struts ，就比較簡單了

獲取上傳的時間：

Calendar cal = Calendar.getInstance();

String year = String.valueOf(cal.get(Calendar.YEAR));

String month = String.valueOf(cal.get(Calendar.MONTH));

獲取路徑：

String path = ServletActionContext.getServletContext().getRealPath(“/”+year+”/”+month);

直接保存在 path 這個目錄裡面就可以

如果沒有使用 框架，可以使用 FileUpload 這個 jar 包來上傳文件

java 上傳附件實現方法

第一,jsp上傳頁面內容:

%@ page contentType=”text/html; charset=GBK” %

%@ taglib uri=”/WEB-INF/struts-html.tld” prefix=”html” %

html

head

title

jsp1

/title

/head

body bgcolor=”#ffffff”

html:form action=”myupload.do” method=”post” enctype=”multipart/form-data”

html:file property=”thisFile”/br

html:file property=”thisFile”/br

html:submit/

/html:form

/body

/html

第二,一個javabean

package upload;

import org.apache.struts.action.ActionForm;

import org.apache.struts.upload.FormFile;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionMapping;

import javax.servlet.http.HttpServletRequest;

public class FileInfo extends ActionForm {

private FormFile thisFile;

public FormFile getThisFile() {

return thisFile;

}

public void setThisFile(FormFile thisFile) {

this.thisFile = thisFile;

}

public ActionErrors validate(ActionMapping actionMapping,

HttpServletRequest httpServletRequest) {

/** @todo: finish this method, this is just the skeleton.*/

return null;

}

public void reset(ActionMapping actionMapping,

HttpServletRequest servletRequest) {

}

}

第三,一個action

package upload;

import java.io.*;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.action.ActionForm;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.Action;

import org.apache.struts.upload.FormFile;

public class myupload extends Action {

public ActionForward execute(ActionMapping actionMapping,

ActionForm actionForm,

HttpServletRequest request,

HttpServletResponse response) throws

FileNotFoundException, IOException {

FileInfo fileInfo = (FileInfo) actionForm;

//獲取上傳文件

FormFile f=fileInfo.getThisFile();

InputStream is=f.getInputStream();

//將文件存入服務器上

String filename=request.getSession().getServletContext().getRealPath(“/shangchuan/”+f.getFileName());

OutputStream os=new FileOutputStream(filename);

int x=0;

//優化流處理過程

byte[] buffer = new byte[8192];

while((x=is.read(buffer, 0, 8192))!=-1)

{

os.write(buffer,0,x);

}

os.close();

response.sendRedirect(“jsp1.jsp”);//根據實際情況跳轉

return null;

}

}