本文目錄一覽：
java怎麼實現上傳附件的功能
上傳附件，實際上就是將文件存儲到遠程服務器，進行臨時存儲。舉例：
**
* 上傳文件
*
* @param fileName
* @param plainFilePath 文件路徑路徑
* @param filepath
* @return
* @throws Exception
*/
public static String fileUploadByFtp(String plainFilePath, String fileName, String filepath) throws Exception {
FileInputStream fis = null;
ByteArrayOutputStream bos = null;
FTPClient ftpClient = new FTPClient();
String bl = “false”;
try {
fis = new FileInputStream(plainFilePath);
bos = new ByteArrayOutputStream(fis.available());
byte[] buffer = new byte[1024];
int count = 0;
while ((count = fis.read(buffer)) != -1) {
bos.write(buffer, 0, count);
}
bos.flush();
Log.info(“加密上傳文件開始”);
Log.info(“連接遠程上傳服務器”+CCFCCBUtil.CCFCCBHOSTNAME+”:”+22);
ftpClient.connect(CCFCCBUtil.CCFCCBHOSTNAME, 22);
ftpClient.login(CCFCCBUtil.CCFCCBLOGINNAME, CCFCCBUtil.CCFCCBLOGINPASSWORD);
FTPFile[] fs;
fs = ftpClient.listFiles();
for (FTPFile ff : fs) {
if (ff.getName().equals(filepath)) {
bl=”true”;
ftpClient.changeWorkingDirectory(“/”+filepath+””);
}
}
Log.info(“檢查文件路徑是否存在：/”+filepath);
if(“false”.equals(bl)){
ViewUtil.dataSEErrorPerformedCommon( “查詢文件路徑不存在：”+”/”+filepath);
return bl;
}
ftpClient.setBufferSize(1024);
ftpClient.setControlEncoding(“GBK”);
// 設置文件類型（二進制）
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpClient.storeFile(fileName, fis);
Log.info(“上傳文件成功：”+fileName+”。文件保存路徑：”+”/”+filepath+”/”);
return bl;
} catch (Exception e) {
throw e;
} finally {
if (fis != null) {
try {
fis.close();
} catch (Exception e) {
Log.info(e.getLocalizedMessage(), e);
}
}
if (bos != null) {
try {
bos.close();
} catch (Exception e) {
Log.info(e.getLocalizedMessage(), e);
}
}
}
}
備註：只需要修改上傳的服務器地址、用戶名、密碼即可進行服務器訪問上傳。根據實際需要修改即可。
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;
}
}
怎麼用java發送帶附件的郵件代碼詳解
package email;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.Socket;
import java.nio.charset.Charset;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import sun.misc.BASE64Encoder;
public class Mail {
private static final String LINE_END = “\r\n”;
private boolean isDebug = true;
private boolean isAllowReadSocketInfo = true;
private String host;
private String from;
private ListString to;
private ListString cc;
private ListString bcc;
private String subject;
private String user;
private String password;
private String contentType;
private String boundary;
private String boundaryNextPart;
private String contentTransferEncoding;
private String charset;
private String contentDisposition;
private String content;
private String simpleDatePattern;
private String defaultAttachmentContentType;
private ListMailPart partSet;
private static MapString, String contentTypeMap;
static {
// MIME Media Types
contentTypeMap = new HashMapString, String();
contentTypeMap.put(“xls”, “application/vnd.ms-excel”);
contentTypeMap.put(“xlsx”, “application/vnd.ms-excel”);
contentTypeMap.put(“xlsm”, “application/vnd.ms-excel”);
contentTypeMap.put(“xlsb”, “application/vnd.ms-excel”);
contentTypeMap.put(“doc”, “application/msword”);
contentTypeMap.put(“dot”, “application/msword”);
contentTypeMap.put(“docx”, “application/msword”);
contentTypeMap.put(“docm”, “application/msword”);
contentTypeMap.put(“dotm”, “application/msword”);
}
private class MailPart extends Mail {
public MailPart() {
}
}
public Mail() {
defaultAttachmentContentType = “application/octet-stream”;
simpleDatePattern = “yyyy-MM-dd HH:mm:ss”;
boundary = “–=_NextPart_zlz_3907_” + System.currentTimeMillis();
boundaryNextPart = “–” + boundary;
contentTransferEncoding = “base64”;
contentType = “multipart/alternative”;
charset = Charset.defaultCharset().name();
partSet = new ArrayListMailPart();
to = new ArrayListString();
cc = new ArrayListString();
bcc = new ArrayListString();
}
private String getPartContentType(String fileName) {
String ret = null;
if (null != fileName) {
int flag = fileName.lastIndexOf(“.”);
if (0 = flag flag fileName.length() – 1) {
fileName = fileName.substring(flag + 1);
}
ret = contentTypeMap.get(fileName);
}
if (null == ret) {
ret = defaultAttachmentContentType;
}
return ret;
}
private String toBase64(String str, String charset) {
if (null != str) {
try {
return toBase64(str.getBytes(charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
return “”;
}
private String toBase64(byte[] bs) {
return new BASE64Encoder().encode(bs);
}
private String toBase64(String str) {
return toBase64(str, Charset.defaultCharset().name());
}
private String getAllParts() {
int partCount = partSet.size();
StringBuilder sbd = new StringBuilder(LINE_END);
for (int i = partCount – 1; i = 0; i–) {
Mail attachment = partSet.get(i);
String attachmentContent = attachment.getContent();
if (null != attachmentContent 0 attachmentContent.length()) {
sbd.append(getBoundaryNextPart()).append(LINE_END);
sbd.append(“Content-Type: “);
sbd.append(attachment.getContentType());
sbd.append(LINE_END);
sbd.append(“Content-Transfer-Encoding: “);
sbd.append(attachment.getContentTransferEncoding());
sbd.append(LINE_END);
if (i != partCount – 1) {
sbd.append(“Content-Disposition: “);
sbd.append(attachment.getContentDisposition());
sbd.append(LINE_END);
}
sbd.append(LINE_END);
sbd.append(attachment.getContent());
sbd.append(LINE_END);
}
}
sbd.append(LINE_END);
sbd.append(LINE_END);
partSet.clear();
return sbd.toString();
}
private void addContent() {
if (null != content) {
MailPart part = new MailPart();
part.setContent(toBase64(content));
part.setContentType(“text/plain;charset=\”” + charset + “\””);
partSet.add(part);
}
}
private String listToMailString(ListString mailAddressList) {
StringBuilder sbd = new StringBuilder();
if (null != mailAddressList) {
int listSize = mailAddressList.size();
for (int i = 0; i listSize; i++) {
if (0 != i) {
sbd.append(“;”);
}
sbd.append(“”).append(mailAddressList.get(i)).append(“”);
}
}
return sbd.toString();
}
private ListString getrecipient() {
ListString list = new ArrayListString();
list.addAll(to);
list.addAll(cc);
list.addAll(bcc);
return list;
}
public void addAttachment(String filePath) {
addAttachment(filePath, null);
}
public void addTo(String mailAddress) {
this.to.add(mailAddress);
}
public void addCc(String mailAddress) {
this.cc.add(mailAddress);
}
public void addBcc(String mailAddress) {
this.bcc.add(mailAddress);
}
public void addAttachment(String filePath, String charset) {
if (null != filePath filePath.length() 0) {
File file = new File(filePath);
try {
addAttachment(file.getName(), new FileInputStream(file),
charset);
} catch (FileNotFoundException e) {
System.out.println(“錯誤：” + e.getMessage());
System.exit(1);
}
}
}
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 代碼發郵件怎麼添加附件
實現java發送郵件的過程大體有以下幾步：
準備一個properties文件，該文件中存放SMTP服務器地址等參數。
利用properties創建一個Session對象
利用Session創建Message對象，然後設置郵件主題和正文
利用Transport對象發送郵件
需要的jar有2個：activation.jar和mail.jar發送附件，需要用到Multipart對象。
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
public class JavaMailWithAttachment {
private MimeMessage message;
private Session session;
private Transport transport;
private String mailHost = “”;
private String sender_username = “”;
private String sender_password = “”;
private Properties properties = new Properties();
/*
* 初始化方法
*/
public JavaMailWithAttachment(boolean debug) {
InputStream in = JavaMailWithAttachment.class.getResourceAsStream(“MailServer.properties”);
try {
properties.load(in);
this.mailHost = properties.getProperty(“mail.smtp.host”);
this.sender_username = properties.getProperty(“mail.sender.username”);
this.sender_password = properties.getProperty(“mail.sender.password”);
} catch (IOException e) {
e.printStackTrace();
}
session = Session.getInstance(properties);
session.setDebug(debug);// 開啟後有調試信息
message = new MimeMessage(session);
}
/**
* 發送郵件
*
* @param subject
* 郵件主題
* @param sendHtml
* 郵件內容
* @param receiveUser
* 收件人地址
* @param attachment
* 附件
*/
public void doSendHtmlEmail(String subject, String sendHtml, String receiveUser, File attachment) {
try {
// 發件人
InternetAddress from = new InternetAddress(sender_username);
message.setFrom(from);
// 收件人
InternetAddress to = new InternetAddress(receiveUser);
message.setRecipient(Message.RecipientType.TO, to);
// 郵件主題
message.setSubject(subject);
// 向multipart對象中添加郵件的各個部分內容，包括文本內容和附件
Multipart multipart = new MimeMultipart();
// 添加郵件正文
BodyPart contentPart = new MimeBodyPart();
contentPart.setContent(sendHtml, “text/html;charset=UTF-8”);
multipart.addBodyPart(contentPart);
// 添加附件的內容
if (attachment != null) {
BodyPart attachmentBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(attachment);
attachmentBodyPart.setDataHandler(new DataHandler(source));
// 網上流傳的解決文件名亂碼的方法，其實用MimeUtility.encodeWord就可以很方便的搞定
// 這裡很重要，通過下面的Base64編碼的轉換可以保證你的中文附件標題名在發送時不會變成亂碼
//sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
//messageBodyPart.setFileName(“=?GBK?B?” + enc.encode(attachment.getName().getBytes()) + “?=”);
//MimeUtility.encodeWord可以避免文件名亂碼
attachmentBodyPart.setFileName(MimeUtility.encodeWord(attachment.getName()));
multipart.addBodyPart(attachmentBodyPart);
}
// 將multipart對象放到message中
message.setContent(multipart);
// 保存郵件
message.saveChanges();
transport = session.getTransport(“smtp”);
// smtp驗證，就是你用來發郵件的郵箱用戶名密碼
transport.connect(mailHost, sender_username, sender_password);
// 發送
transport.sendMessage(message, message.getAllRecipients());
System.out.println(“send success!”);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (transport != null) {
try {
transport.close();
} catch (MessagingException e) {
e.printStackTrace();
}
}
}
}
public static void main(String[] args) {
JavaMailWithAttachment se = new JavaMailWithAttachment(true);
File affix = new File(“c:\\測試-test.txt”);
se.doSendHtmlEmail(“郵件主題”, “郵件內容”, “xxx@XXX.com”, affix);//
}
}
原創文章，作者：小藍，如若轉載，請註明出處：https://www.506064.com/zh-hk/n/272425.html
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