ajaxFileUpload文件上传后台通用代码
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.text.SimpleDateFormat;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.fileupload.DiskFileUpload;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.log4j.Logger;
//import sun.util.logging.resources.logging;
/**
* 通用文件上传
*
* @author Wang
* @date 2013-07-20
*/
public class Upload{
/**
* 上传后，将InputStream保存到封装的map中
*/
public static int FILESTREAM=1;
/**
* 上传后，将文件转化为二进制保存
*/
public static int FILEBYTES=2;
/**
*
*/
public static int FILE=3;
private String fileName = "";
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
private static String filePath ="";
private static long maxUploadSize = 1024*512*1024;
private static String headerEncoding ="UTF-8";
Logger log = Logger.getLogger(getClass());
/**
* 默认上传最大上限
* 保存类型为FILESTREAM
* @param request
* @return
*/
public Map upload(HttpServletRequest request){
return upload(request,maxUploadSize,FILESTREAM);
}
/**
*判断filePhth路径中是否存在该文件夹，不存在则创建该文件夹
*创建成功则返回True
* @param filePhth
* @return
**/
public boolean createFile(String filePhth){
File dirFile;
boolean bFile = false;
try{
dirFile = new File(filePhth);
bFile = dirFile.exists();
if(bFile != true){
bFile = dirFile.mkdir();
}
}catch(Exception e)
{
}
return bFile;
}
static{
Properties r = PropertiesHelper.loadProperty("/upload.properties");
if(!r.isEmpty()){
try{
filePath = r.getProperty("filePath");
}catch(Exception e){
Logger.getLogger(Upload.class).error("无法读filePath参数",e);
}
try{
headerEncoding = r.getProperty("headerEncoding");
}catch(Exception e){
Logger.getLogger(Upload.class).error("无法读headerEncoding参数",e);
}
try{
maxUploadSize = Long.parseLong(String.valueOf(r.get("maxUploadSize")));
}catch(Exception e){
Logger.getLogger(Upload.class).error("无法读maxUploadSize参数",e);
}}else{
Logger.getLogger(Upload.class).error("无法读取 upload.properties");
}
}
/**
* @param request
* @param size 上传文件大小上限
* @param type 保存类型 1、保存InputStream，2保存bytes
* @return
*/
public Map upload(HttpServletRequest request,long size,int type){
Map map = new HashMap();
DiskFileUpload fileUpload = new DiskFileUpload();
fileUpload.setSizeMax(size==0?maxUploadSize:size);//最大上传大小
fileUpload.setHeaderEncoding("UTF-8");
fileUpload.setSizeThreshold(4096);
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");
FileItem fileItem=null;
String oldFileName = "";
try {
List itemList = fileUpload.parseRequest(request);
for(Iterator iterator = itemList.iterator();iterator.hasNext();){
fileItem = (FileItem)iterator.next();
System.out.println("--------maps----------"+fileItem.isFormField());
if(fileItem.isFormField()){
map.put(fileItem.getFieldName(), fileItem.getString());
}else{
if(type==FILESTREAM){
map.put(fileItem.getFieldName(), fileItem.getInputStream());
}else if(type==FILEBYTES){
InputStream in = fileItem.getInputStream();
byte[] b = new byte[in.available()];
in.read(b);
map.put(fileItem.getFieldName(), b);
}else{
String strPhthString = filePath+File.separator+ File.separator;
oldFileName = fileItem.getName();
map.put("FILE_NAME", oldFileName.substring(oldFileName.lastIndexOf(File.separator)+1, oldFileName.length()));
map.put("FILE_SIZE", new Long(fileItem.getSize()));
fileName = fileName + oldFileName.substring(oldFileName.lastIndexOf("."), oldFileName.length());//存储文件名；
map.put(fileItem.getFieldName(), fileName);//该参数为生成的文件夹和文件名连在一起
createFile(strPhthString);
map.put("FILE_PATH", fileName);
fileItem.write(new File(strPhthString + fileName));
}
}
}
log.error("upload:"+map);
return map;
}catch(SizeLimitExceededException e){
map.clear();
map.put("error","file to large. The max size is"+fileUpload.getSizeMax());
} catch (FileUploadException e) {
map.clear();
map.put("error",e.getMessage());
} catch (IOException e) {
map.clear();
map.put("error",e.getMessage());
} catch (Exception e) {
e.printStackTrace();
map.put("error",e.getMessage());
}
return map;
}
/**
* @param request
* @param size 上传文件大小上限
* @param type 保存类型 1、保存InputStream，2保存bytes
* @return
*/
public Map upload2(HttpServletRequest request,long size,int type){
Map map = new HashMap();
DiskFileUpload fileUpload = new DiskFileUpload();
fileUpload.setSizeMax(size);//最大上传大小
FileItem fileItem=null;
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");
String oldFileName = "";
try {
List itemList = fileUpload.parseRequest(request);
String strPhthString = request.getRealPath("/")+"/upimage/" + sdf.format(new Date());
for(Iterator iterator = itemList.iterator();iterator.hasNext();){
fileItem = (FileItem)iterator.next();
if(fileItem.isFormField()){
map.put(fileItem.getFieldName(), fileItem.getString());
}else{
if(type==FILESTREAM){
map.put(fileItem.getFieldName(), fileItem.getInputStream());
}else if(type==FILEBYTES){
InputStream in = fileItem.getInputStream();
byte[] b = new byte[in.available()];
in.read(b);
map.put(fileItem.getFieldName(), b);
}else{
oldFileName = fileItem.getName();
fileName = CommonUtil.getCurrentDateTime() + oldFileName.substring(oldFileName.indexOf("."), oldFileName.length());
map.put(fileItem.getFieldName(), sdf.format(new Date())+"/"+fileName);//该参数为生成的文件夹和文件名连在一起
createFile(strPhthString);
fileItem.write(new File(strPhthString + "/" + fileName));
}
}
}
log.error("upload:"+map);
return map;
}catch(SizeLimitExceededException e){
map.clear();
map.put("error","file to large. The max size is"+size);
} catch (FileUploadException e) {
map.clear();
map.put("error",e.getMessage());
} catch (IOException e) {
map.clear();
map.put("error",e.getMessage());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return map;
}
}
记得引用 commons-fileupload.jar 包，调用方式
Upload upload = new Upload();
String fjid = Identities.uuid2();// 唯一 32位编码
upload.setFileName(fjid);
int uptype = Upload.FILE;
Map map = upload.upload(getRequest() , 0, uptype); //文件删除
if (map.isEmpty()) {
setAttr("success", false);
setAttr("msg", "未知");
renderJson();
} else if (map.containsKey("error")) {
setAttr("success", false);
setAttr("msg", ""+ map.get("error") +"");
renderJson();
}
//可以将获取的文件真实名称，文件服务器名称，文件路径 ，文件大小 保存数据库
String ext = getFileExt((String) map.get("FILE_NAME"));
String wjmc= map.get("FILE_NAME").toString();
String path=map.get("FILE_PATH").toString();
String archivesfileid= getPara(0);
String size=map.get("FILE_SIZE").toString();