java xheditor 上传图片_xheditor-文件上传-java-支持html5-application/octet-stream

package

com.XXX.xheditor.servlet;

import

java.io.BufferedOutputStream;

import

java.io.File;

import

java.io.FileOutputStream;

import

java.io.IOException;

import

java.io.OutputStream;

import

java.io.PrintWriter;

import

java.io.Serializable;

import

java.text.SimpleDateFormat;

import

java.util.Date;

import

java.util.HashMap;

import

java.util.Iterator;

import

java.util.List;

import

java.util.Map;

import

java.util.UUID;

import

javax.servlet.ServletException;

import

javax.servlet.http.HttpServlet;

import

javax.servlet.http.HttpServletRequest;

import

javax.servlet.http.HttpServletResponse;

import

org.apache.commons.fileupload.DiskFileUpload;

import

org.apache.commons.fileupload.FileItem;

import

org.apache.commons.lang.StringUtils;

//

xhEditor文件上传的Java - Servlet实现.

//  @

author WeiMiao

//  @

refer to easinchu

//  @

version 2

//  @

description 增加html5上传功能的支持

public class

UploadFileServlet extends HttpServlet {

private static final long serialVersionUID =

1541334866883495283L;

private static String baseDir =

"/UploadFile/"; // 上传文件存储目录

private static String fileExt =

"jpg,jpeg,bmp,gif,png";

private static Long maxSize = 0l;

private static String dirType = "1";

// 0:不建目录

1:按天存入目录 2:按月存入目录 3:按扩展名存目录 建议使用按天存

public void init() throws ServletException

{

baseDir =

this.getInitParameter("baseDir"); //获取web.xml中servlet的配置文件目录参数

if

(StringUtils.isEmpty(baseDir)) baseDir = "/UploadFile/";

//获取文件上传存储的相当路径

String realBaseDir =

this.getServletConfig().getServletContext().getRealPath(baseDir);

File baseFile = new File(realBaseDir);

if (!baseFile.exists()) {

baseFile.mkdir();

}

fileExt =

this.getInitParameter("fileExt"); //获取文件类型参数

if (StringUtils.isEmpty(fileExt)) fileExt =

"jpg,jpeg,gif,bmp,png";

String maxSize_str =

this.getInitParameter("maxSize"); //获取文件大小参数

if (StringUtils.isNotEmpty(maxSize_str))

{

maxSize = new Long(maxSize_str);

} else {

maxSize =

Long.valueOf("5242880"); //5M

}

dirType =

this.getInitParameter("dirType"); //获取文件目录类型参数

if (StringUtils.isEmpty(dirType)) dirType =

"1";

if (",0,1,2,3,".indexOf("," + dirType + ",")

< 0) dirType = "1";

}

// 上传文件数据处理过程

@SuppressWarnings( { "unchecked" })

public void doPost(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html;

charset=UTF-8");

response.setHeader("Cache-Control",

"no-cache");

String err = "";

String newFileName = "";

if

("application/octet-stream".equals(request.getContentType()))

{ //HTML 5

上传

try {

String dispoString =

request.getHeader("Content-Disposition");

int iFindStart =

dispoString.indexOf("name=\"")+6;

int iFindEnd = dispoString.indexOf("\"",

iFindStart);

iFindStart =

dispoString.indexOf("filename=\"")+10;

iFindEnd = dispoString.indexOf("\"",

iFindStart);

String sFileName =

dispoString.substring(iFindStart, iFindEnd);

int i = request.getContentLength();

byte buffer[] = new byte[i];

int j = 0;

while(j

< i) { //获取表单的上传文件

int k = request.getInputStream().read(buffer, j,

i-j);

j += k;

}

if (buffer.length == 0)

{ //文件是否为空

printInfo(response, "上传文件不能为空", "");

return;

}

if (maxSize

> 0 && buffer.length

> maxSize) { //检查文件大小

printInfo(response, "上传文件的大小超出限制",

"");

return;

}

String filepathString =

getSaveFilePath(sFileName, response);

if

("不允许上传此类型的文件".equals(filepathString)) return; //检查文件类型

OutputStream out=new

BufferedOutputStream(new FileOutputStream(this.getServletConfig().getServletContext().getRealPath("")

+ filepathString,true));

out.write(buffer);

out.close();

newFileName = request.getContextPath() +

filepathString;

} catch (Exception ex) {

System.out.println(ex.getMessage());

newFileName = "";

err = "错误: " + ex.getMessage();

}

} else {

DiskFileUpload upload = new

DiskFileUpload();

try {

List

items = upload.parseRequest(request);

Map

Serializable> fields = new

HashMap

Serializable>();

Iterator

iter = items.iterator();

while (iter.hasNext()) {

FileItem item = (FileItem)

iter.next();

if (item.isFormField())

fields.put(item.getFieldName(),

item.getString());

else

fields.put(item.getFieldName(), item);

}

FileItem uploadFile =

(FileItem) fields.get("filedata"); //获取表单的上传文件

String fileNameLong =

uploadFile.getName(); //获取文件上传路径名称

if

(uploadFile.getSize() == 0) { //文件是否为空

printInfo(response, "上传文件不能为空", "");

return;

}

if (maxSize

> 0 &&

uploadFile.getSize() > maxSize) { //检查文件大小

printInfo(response, "上传文件的大小超出限制",

"");

return;

}

String filepathString =

getSaveFilePath(fileNameLong, response);

if

("不允许上传此类型的文件".equals(filepathString)) return; //检查文件类型

File savefile = new

File(this.getServletConfig().getServletContext().getRealPath("") +

filepathString);

uploadFile.write(savefile);

//存储上传文件

newFileName = request.getContextPath() +

filepathString;

} catch (Exception ex) {

System.out.println(ex.getMessage());

newFileName = "";

err = "错误: " + ex.getMessage();

}

}

printInfo(response, err, newFileName);

}

public String getSaveFilePath(String sFileName,

HttpServletResponse response) throws IOException {

String extensionName =

sFileName.substring(sFileName.lastIndexOf(".") + 1);

//获取文件扩展名

if (("," +

fileExt.toLowerCase() + ",").indexOf("," +

extensionName.toLowerCase() + ",") < 0) {

//检查文件类型

printInfo(response, "不允许上传此类型的文件",

"");

return "不允许上传此类型的文件";

}

String fileFolder =

""; // 0:不建目录, 1:按天存入目录,

2:按月存入目录, 3:按扩展名存目录.建议使用按天存。

if (dirType.equalsIgnoreCase("1")) fileFolder =

new SimpleDateFormat("yyyyMMdd").format(new Date());

if (dirType.equalsIgnoreCase("2")) fileFolder =

new SimpleDateFormat("yyyyMM").format(new Date());

if (dirType.equalsIgnoreCase("3")) fileFolder =

extensionName.toLowerCase();

String saveDirPath =

baseDir + fileFolder + "/"; //文件存储的相对路径

String saveFilePath =

this.getServletConfig().getServletContext().getRealPath("") +

saveDirPath; //文件存储在容器中的绝对路径

File fileDir = new

File(saveFilePath); //构建文件目录以及目录文件

if (!fileDir.exists()) {

fileDir.mkdirs();

}

String filename =

UUID.randomUUID().toString(); //重命名文件

return saveDirPath + filename + "." +

extensionName;

}

// 使用I/O流输出 json格式的数据

public void printInfo(HttpServletResponse

response, String err, String newFileName) throws IOException

{

response.setContentType("text/plain");

response.setCharacterEncoding("UTF-8");

PrintWriter out =

response.getWriter();

out.println("{\"err\":\"" + err + "\",\"msg\":\""

+ newFileName + "\"}");

out.flush();

out.close();

}

}