正文
java上传附件代码 java 上传附件
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
怎么用Java代码实现上传下载附件
int id = (Integer) request.getSession().getAttribute("id");
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload sfu = new ServletFileUpload(factory);
sfu.setFileSizeMax(1024 * 1024);//1M
ListFileItem items = sfu.parseRequest(request);
for (int i = 0; i items.size(); i++) {
FileItem item = items.get(i);
if (!item.isFormField()) {
ServletContext sctx = getServletContext();
String picurl = sctx.getRealPath("upload");
String fileName = item.getName();
fileName = fileName.substring(fileName
.lastIndexOf("\\") + 1);
PicDao picDao = new PicDaoImpl();
System.err.println(id);
picDao.savePic(id, fileName);
File file = new File(picurl + "/pic_"
+ StringUtils.leftPad(id + "", 5, '0') + "/"
+ fileName);
item.write(file);
}
}
response.sendRedirect("userDetail.do?id=" + id);
相关问答
Q1: 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);
}
}
}
Q2: java 文件上传的代码，尽量详细一点。。。
// 这是我写的一个方法，里面只需要传两个参数就OK了，在任何地方调用此方法都可以文件上传
/**
* 上传文件
* @param file待上传的文件
* @param storePath待存储的路径(该路径还包括文件名)
*/
public void uploadFormFile(FormFile file,String storePath)throws Exception{
// 开始上传
InputStream is =null;
OutputStream os =null;
try {
is = file.getInputStream();
os = new FileOutputStream(storePath);
int bytes = 0;
byte[] buffer = new byte[8192];
while ((bytes = is.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytes);
}
os.close();
is.close();
} catch (Exception e) {
throw e;
}
finally{
if(os!=null){
try{
os.close();
os=null;
}catch(Exception e1){
;
}
}
if(is!=null){
try{
is.close();
is=null;
}catch(Exception e1){
;
}
}
}
}
Q3: 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。
Q4: Java中fileupload上传文件的代码
private static DiskFileItemFactory factory; //获得磁盘文件条目工厂
private static ServletFileUpload upload; //文件上传处理类
factory = new DiskFileItemFactory(); //获得磁盘文件条目工厂
factory.setRepository(new File(config.getCache())); //创建缓存工厂
factory.setSizeThreshold(1024*1024*2) ; //设置缓存区java上传附件代码的大小
upload = new ServletFileUpload(factory); //高水平java上传附件代码的API文件上传处理
upload.setSizeMax(10 * 1024 * 1024); //设置文件上传的最大值
upload.setFileSizeMax(2* 1024 * 1024); //设置文件上传的最大值
ListFileItem list = upload.parseRequest(request);
for(FileItem item : list){
String fieldName = item.getFieldName(); //获取表单的属性名字
String fileName = item.getName() ; //获取文件名
if(item.isFormField()){ //如果获取的 表单信息是普通的 文本 信息
}else{
File file = new File("d://test.txt");
item.write(file);
}
}
java上传附件代码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 上传附件、java上传附件代码的信息别忘了在本站进行查找喔。
