本文目录一览：
java怎么实现上传附件的功能
上传附件，实际上就是将文件存储到远程服务器，进行临时存储。举例：
/**
* 上传文件
*
* @param fileName
* @param plainFilePath 文件路径路径
* @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("加密上传文件开始");
Log.info("连接远程上传服务器" + 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("检查文件路径是否存在：/" + filepath);
if ("false".equals(bl)) {
ViewUtil.dataSEErrorPerformedCommon("查询文件路径不存在：" + "/" + filepath);
return bl;
}
ftpClient.setBufferSize(1024);
ftpClient.setControlEncoding("GBK");
// 设置文件类型（二进制）
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpClient.storeFile(fileName, fis);
Log.info("上传文件成功：" + fileName + "。文件保存路径：" + "/" + 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);
}
}
}
}
备注：只需要修改上传的服务器地址、用户名、密码即可进行服务器访问上传。根据实际需要修改即可。
java 上传附件实现方法
第一，jsp上传页面内容:
<%@ 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>
第二，一个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) {
}
}
第三，一个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;
//获取上传文件
FormFile f = fileInfo.getThisFile();
InputStream is = f.getInputStream();
//将文件存入服务器上
String filename = request.getSession().getServletContext().getRealPath("/shangchuan/" + f.getFileName());
OutputStream os = new FileOutputStream(filename);
int x = 0;
//优化流处理过程
byte[] buffer = new byte[8192];
while ((x = is.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, x);
}
os.close();
response.sendRedirect("jsp1.jsp");//根据实际情况跳转
return null;
}
}
怎么用java发送带附件的邮件代码详解
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 List<String> to;
private List<String> cc;
private List<String> 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 List<MailPart> partSet;
private static Map<String, String> contentTypeMap;
static {
// MIME Media Types
contentTypeMap = new HashMap<String, 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 ArrayList<MailPart>();
to = new ArrayList<String>();
cc = new ArrayList<String>();
bcc = new ArrayList<String>();
}
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 && attachmentContent.length() > 0) {
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(List<String> 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 List<String> getrecipient() {
List<String> list = new ArrayList<String>();
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("错误：" + e.getMessage());
System.exit(1);
}
}
}
}
上传附件 java 代码
SmartUpload上传图片 记得下载jar包啊 别忘了把名改成smartUpload.jar Utility类：
package com.tidyinfo.utils;
import java.util.Calendar;
public class Utility {
//生成形如:\2006\08\18的路径
private String path;
//生成形如: 20060818125012的唯一id号
private String id;
//生成形如：/2006/08/18的路径
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 i < 10 ? ("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：（根据不同情况要更改相关代码）
User userForm = new User();
String result = new String();
SmartUpload su = new SmartUpload();
//文件名
String filename = new String();
//文件扩展名
String fileext = new String();
//文件上传后存储的路径
String path = request.getRealPath(request.getContextPath());
path = path.substring(0, path.lastIndexOf("\\"));
path += "\\images";
//图片的url
String url = new String();
//创建文件夹
java.io.File file = new java.io.File(path);
file.mkdirs();
try {
// 上传初始化
su.initialize(this.servlet.getServletConfig(), request, response);
//设定上传限制
//1.限制每个上传照片的最大长度。
su.setMaxFileSize(5000000);
//2.限制总上传数据的长度。
su.setTotalMaxFileSize(10000000);
//3.设定允许上传的照片（通过扩展名限制）。
su.setAllowedFilesList("jpg,gif,GIF,JPG");
//上传照片
su.upload();
//获得请求的表单数据
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);
//将上传照片全部保存到指定目录
if (!su.getFiles().getFile(0).isMissing()) {
su.save(path, su.SAVE_PHYSICAL);
//文件名
filename = su.getFiles().getFile(0).getFileName();
//得到扩展名
fileext = su.getFiles().getFile(0).getFileExt();
//给图片改名，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);
//上传图片的url
url = request.getContextPath() + "/images/" + newName;
if (oldFile != null) {
oldFile.renameTo(newFile);
} else {
result += "命名出错！";
}
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出错信息：";
result += e.getMessage();
System.out.println(result);
}
java 代码发邮件怎么添加附件
实现java发送邮件的过程大体有以下几步：
- 准备一个properties文件，该文件中存放SMTP服务器地址等参数。
- 利用properties创建一个Session对象
- 利用Session创建Message对象，然后设置邮件主题和正文
- 利用Transport对象发送邮件 需要的jar有2个：activation.jar和mail.jar发送附件，需要用到Multipart对象。
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); // 开启后有调试信息
message = new MimeMessage(session);
}
/**
* 发送邮件
*
* @param subject
* 邮件主题
* @param sendHtml
* 邮件内容
* @param receiveUser
* 收件人地址
* @param attachment
* 附件
*/
public void doSendHtmlEmail(String subject, String sendHtml, String receiveUser, File attachment) {
try {
// 发件人
InternetAddress from = new InternetAddress(sender_username);
message.setFrom(from);
// 收件人
InternetAddress to = new InternetAddress(receiveUser);
message.setRecipient(Message.RecipientType.TO, to);
// 邮件主题
message.setSubject(subject);
// 向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
Multipart multipart = new MimeMultipart();
// 添加邮件正文
BodyPart contentPart = new MimeBodyPart();
contentPart.setContent(sendHtml, "text/html;charset=UTF-8");
multipart.addBodyPart(contentPart);
// 添加附件的内容
if (attachment != null) {
BodyPart attachmentBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(attachment);
attachmentBodyPart.setDataHandler(new DataHandler(source));
// MimeUtility.encodeWord可以避免文件名乱码
attachmentBodyPart.setFileName(MimeUtility.encodeWord(attachment.getName()));
multipart.addBodyPart(attachmentBodyPart);
}
// 将multipart对象放到message中
message.setContent(multipart);
// 保存邮件
message.saveChanges();
transport = session.getTransport("smtp");
// smtp验证，就是你用来发邮件的邮箱用户名密码
transport.connect(mailHost, sender_username, sender_password);
// 发送
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:\\测试-test.txt");
se.doSendHtmlEmail("邮件主题", "邮件内容", "xxx@XXX.com", affix);
}
}
