使用om-ui上传的servlet代码：
需要jar:
commons-beanutils-1.8.0.jar
commons-collections-3.1.jar
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
commons-lang-2.5.jar
commons-logging-1.1.1.jar
代码：
package org.operamasks.servlet;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class OmEditorImageUploadServlet extends HttpServlet {
// 上传文件的保存路径，相对于应用的根目录
private static final String UPLOAD_PIC_PATH = "images/";
private static final long MAX_SIZE = 10000000;// 设置上传文件最大为 1MB
byte[] imgBufTemp = new byte[102401];
private ServletContext servletContext;
private String OMEditorFuncNum;
public void init(ServletConfig config) throws ServletException {
this.servletContext = config.getServletContext();
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取客户端回调函数名
OMEditorFuncNum = request.getParameter("OMEditorFuncNum");
response.setContentType("text/html;charset=UTF-8");
defaultProcessFileUpload(request, response);
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public String getSavePath(String fileName) {
String realPath = servletContext.getRealPath("/");
return realPath + UPLOAD_PIC_PATH + fileName;
}
public String getFileUrl(String fileName){
return "../../images/" + fileName;
}
private void defaultProcessFileUpload(HttpServletRequest request, HttpServletResponse response)
throws IOException {
ServletFileUpload upload = new ServletFileUpload();
upload.setHeaderEncoding("UTF-8");
InputStream stream = null;
BufferedOutputStream bos = null;
String fileUrl = "";
try {
if (ServletFileUpload.isMultipartContent(request)) {
// 设置上传文件大小的最大限制为100KB
upload.setSizeMax(MAX_SIZE);
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
FileItemStream item = iter.next();
stream = item.openStream();
if (!item.isFormField()) {
String prefix = new java.text.SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
// 得到文件的扩展名(无扩展名时将得到全名)
String ext = item.getName().substring(item.getName().lastIndexOf(".") + 1);
String fileName = prefix + "." + ext;
String savePath = getSavePath(fileName);
fileUrl = getFileUrl(fileName);
File file=new File(savePath);
System.out.println(savePath);
System.out.println(fileUrl);
bos = new BufferedOutputStream(new FileOutputStream(file));
int length;
while ((length = stream.read(imgBufTemp)) != -1) {
bos.write(imgBufTemp, 0, length);
}
}
}
StringBuilder script = new StringBuilder();
// 执行客户端回调函数
script.append("
response.getWriter().write(script.toString());
}
} catch (FileUploadException e) {
e.printStackTrace();
StringBuilder script = new StringBuilder();
script.append("
response.getWriter().write(script.toString());
} finally {
if (stream != null) {
try {
stream.close();
} catch (Exception e) {
}
}
if (bos != null) {
try {
bos.close();
} catch (Exception e) {
}
}
}
}
}
一般servlet处理方式：
public FileUploadServlet() {
super();
}
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
final long MAX_SIZE = 3 * 1024 * 1024;// 设置上传文件最大为 3M
// 允许上传的文件格式的列表
final String[] allowedExt = new String[] { "jpg", "jpeg", "gif", "txt",
"doc", "docx", "mp3", "wma", "m4a" };
response.setContentType("text/html");
// 设置字符编码为UTF-8, 这样支持汉字显示
response.setCharacterEncoding("UTF-8");
// 实例化一个硬盘文件工厂,用来配置上传组件ServletFileUpload
DiskFileItemFactory dfif = new DiskFileItemFactory();
dfif.setSizeThreshold(4096);// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
dfif.setRepository(new File(request.getRealPath("/")
+ "ImagesUploadTemp"));// 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录
// 用以上工厂实例化上传组件
ServletFileUpload sfu = new ServletFileUpload(dfif);
// 设置最大上传尺寸
sfu.setSizeMax(MAX_SIZE);
PrintWriter out = response.getWriter();
// 从request得到 所有 上传域的列表
List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {// 处理文件尺寸过大异常
if (e instanceof SizeLimitExceededException) {
out.println("文件尺寸超过规定大小:" + MAX_SIZE + "字节");
out.println("返回");
return;
}
e.printStackTrace();
}
// 没有文件上传
if (fileList == null || fileList.size() == 0) {
out.println("请选择上传文件");
out.println("返回");
return;
}
// 得到所有上传的文件
Iterator fileItr = fileList.iterator();
// 循环处理所有文件
while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;
// 得到当前文件
fileItem = (FileItem) fileItr.next();
// 忽略简单form字段而不是上传域的文件域( 等)
if (fileItem == null || fileItem.isFormField()) {
continue;
}
// 得到文件的完整路径
path = fileItem.getName();
// 得到文件的大小
size = fileItem.getSize();
if ("".equals(path) || size == 0) {
out.println("请选择上传文件 ");
out.println("返回");
return;
}
// 得到去除路径的文件名
String t_name = path.substring(path.lastIndexOf("\") + 1);
// 得到文件的扩展名(无扩展名时将得到全名)
String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
// 拒绝接受规定文件格式之外的文件类型
int allowFlag = 0;
int allowedExtCount = allowedExt.length;
for (; allowFlag < allowedExtCount; allowFlag++) {
if (allowedExt[allowFlag].equals(t_ext))
break;
}
if (allowFlag == allowedExtCount) {
out.println("请上传以下类型的文件");
for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++)
out.println("*." + allowedExt[allowFlag]
+ " ");
out.println("返回");
return;
}
long now = System.currentTimeMillis();
// 根据系统时间生成上传后保存的文件名
String prefix = String.valueOf(now);
// 保存的最终文件完整路径,保存在web根目录下的ImagesUploaded目录下
String u_name = request.getRealPath("/") + "ImagesUploaded/"
+ prefix + "." + t_ext;
try {
// 保存文件
fileItem.write(new File(u_name));
out.println("文件上传成功. 已保存为: " + prefix + "." + t_ext
+ " 文件大小: " + size + "字节");
out.println("继续上传");
} catch (Exception e) {
e.printStackTrace();
}
}
}
public void init() throws ServletException {
// Put your code here
}