「java附件」java附件机制
今天给各位分享java附件的知识，其中也会对java附件机制进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！
本文目录一览：
- 1、java中如何实现向已有的PDF文件插入附件？
- 2、java 代码发邮件怎么添加附件
- 3、java怎么实现上传附件的功能
- 4、java 上传附件实现方法
- 5、怎么把java源代码变成附件文件
- 6、怎么用java发送带附件的邮件代码详解
java中如何实现向已有的PDF文件插入附件？
可以用Spire.Pdf for Java类库给PDF文档添加附件，下面的代码是插入Excel和Word附件给你参考：
import com.spire.pdf.annotations.*;
import com.spire.pdf.attachments.PdfAttachment;
import com.spire.pdf.graphics.*;
import java.awt.*;
import java.awt.geom.Dimension2D;
import java.awt.geom.Rectangle2D;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
public class AttachFiles {
public static void main(String[] args) throws IOException {
//创建PdfDocument对象
PdfDocument doc = new PdfDocument();
//加载PDF文档
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\sample.pdf");
//添加附件到PDF
PdfAttachment attachment = new PdfAttachment("C:\\Users\\Administrator\\Desktop\\使用说明书.docx");
doc.getAttachments().add(attachment);
//绘制标签
String label = "财务报表.xlsx";
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial Unicode MS",Font.PLAIN,12),true);
double x = 35;
double y = doc.getPages().get(0).getActualSize().getHeight() - 200;
doc.getPages().get(0).getCanvas().drawString(label, font, PdfBrushes.getOrange(), x, y);
//添加注释附件到PDF
String filePath = "C:\\Users\\Administrator\\Desktop\\财务报表.xlsx";
byte[] data = toByteArray(filePath);
Dimension2D size = font.measureString(label);
Rectangle2D bound = new Rectangle2D.Float((float) (x + size.getWidth() + 2), (float) y, 10, 15);
PdfAttachmentAnnotation annotation = new PdfAttachmentAnnotation(bound, filePath, data);
annotation.setColor(new PdfRGBColor(new Color(0, 128, 128)));
annotation.setFlags(PdfAnnotationFlags.Default);
annotation.setIcon(PdfAttachmentIcon.Graph);
annotation.setText("点击打开财务报表.xlsx");
doc.getPages().get(0).getAnnotationsWidget().add(annotation);
//保存文档
doc.saveToFile("Attachments.pdf");
}
//读取文件到byte数组
public static byte[] toByteArray(String filePath) throws IOException {
File file = new File(filePath);
long fileSize = file.length();
if (fileSize Integer.MAX_VALUE) {
System.out.println("file too big...");
return null;
}
FileInputStream fi = new FileInputStream(file);
byte[] buffer = new byte[(int) fileSize];
int offset = 0;
int numRead = 0;
while (offset buffer.length (numRead = fi.read(buffer, offset, buffer.length - offset)) = 0) {
offset += numRead;
}
if (offset != buffer.length) {
throw new IOException("Could not completely read file "
+ file.getName());
}
fi.close();
return buffer;
}
}
效果：
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));
// 网上流传的解决文件名乱码的方法，其实用MimeUtility.encodeWord就可以很方便的搞定
// 这里很重要，通过下面的Base64编码的转换可以保证你的中文附件标题名在发送时不会变成乱码
//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);//
}
}
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;
}
}
怎么把java源代码变成附件文件
通过jar命令
jar命令的用法：
下面是jar命令的帮助说明：
用法：jar {ctxui}[vfm0Me] [jar-file] [manifest-file] [entry-point] [-C dir] files ...
选项包括：
-c 创建新的归档文件
-t 列出归档目录
-x 解压缩已归档的指定(或所有)文件
-u 更新现有的归档文件
-v 在标准输出中生成详细输出
-f 指定归档文件名
-m 包含指定清单文件中的清单信息
-e 为捆绑到可执行 jar 文件的独立应用程序，指定应用程序入口点
-0 仅存储；不使用任何 ZIP 压缩
-M 不创建条目的清单文件
-i 为指定的 jar 文件生成索引信息
-C 更改为指定的目录并包含其中的文件
如果有任何目录文件，则对其进行递归处理。清单文件名、归档文件名和入口点名的指定顺序与 "m"、"f" 和 "e" 标志的指定顺序相同。
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 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("错误：" + e.getMessage());
System.exit(1);
}
}
}
java附件的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java附件机制、java附件的信息别忘了在本站进行查找喔。
发布于：2022-12-09，除非注明，否则均为原创文章，转载请注明出处。