本文目录一览：
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 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附件上传功能，上传的附件要根据时间来重命名，上传的路径保存在服务器指定目录根据年月来分的目录里
如果使用框架的话，比如 struts ，就比较简单了
获取上传的时间：
Calendar cal = Calendar.getInstance();
String year = String.valueOf(cal.get(Calendar.YEAR));
String month = String.valueOf(cal.get(Calendar.MONTH));
获取路径：
String path = ServletActionContext.getServletContext().getRealPath("/"+year+"/"+month);
直接保存在 path 这个目录里面就可以
如果没有使用 框架，可以使用 FileUpload 这个 jar 包来上传文件
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;
}
}
