用bean上传文件***************************************************
fileuploadBean.jsp****************************
<jsp:useBean id="TheBean" scope="page" class="bean.FileUploadBean" />
 <%TheBean.setSavePath("d:\\");TheBean.doUpload(request);
out.println("Filename:" + TheBean.getFilename());
out.println("<BR>内容类型:" + TheBean.getContentType());
out.println("<BR>作者:" + TheBean.getFieldValue("Author"));
out.println("<BR>公司:" + TheBean.getFieldValue("Company"));
out.println("<BR>说明:" + TheBean.getFieldValue("Comment"));%>
.FileUploadBean.java****************************
package bean;import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletInputStream;import java.util.Dictionary;
import java.util.Hashtable;import java.io.PrintWriter;import java.io.BufferedWriter;
import java.io.FileWriter;import java.io.IOException;import java.io.*;
public class FileUploadBean {
private String savePath, filepath, filename, contentType;private byte[] b;
byte t;private Dictionary fields;public String getFilename() {return filename;}
public String getFilepath() {return filepath;}public void setSavePath(String savePath) {
this.savePath = savePath;}public String getContentType() {
return contentType;}public String getFieldValue(String fieldName) {
if (fields == null || fieldName == null)return null;return (String) fields.get(fieldName);
}private void setFilename(String s) {if (s==null)return;int pos = s.indexOf("filename=\"");
if (pos != -1) {filepath = s.substring(pos+10, s.length()-1);
// Windows浏览器发送完整的文件路径和名字// 但Linux/Unix和Mac浏览器只发送文件名字
pos = filepath.lastIndexOf("\\");if (pos != -1)filename = filepath.substring(pos + 1);
else filename = filepath;}}private void setContentType(String s) {if (s==null)
return;int pos = s.indexOf(": ");if (pos != -1)contentType = s.substring(pos+2, s.length());}
public void getByte(HttpServletRequest request) {DataInputStream is;
int i=0;try{is=new DataInputStream(request.getInputStream());
b=new byte[request.getContentLength()];while (true)
{try{t=is.readByte();b[i]=t;i++;}catch(EOFException e) { break;} }is.close();}
catch(IOException e) {}}public void doUpload1(HttpServletRequest request) throws
IOException { byte[] line=new byte[128];
FileOutputStream os=new FileOutputStream("c:\\Demo.out");
ServletInputStream in = request.getInputStream(); getByte(request);
String temp=""; temp=new String(b,"ISO8859_1"); byte[] img=temp.getBytes("ISO8859_1");
for (int i=0;i<img.length;i++) { os.write(img[i]); } os.close(); }
public void doUpload(HttpServletRequest request) throws IOException {
request.setCharacterEncoding("GB2312");
ServletInputStream in = request.getInputStream();byte[] line = new byte[1280];
int i = in.readLine(line, 0, 1280);if (i < 3)return;int boundaryLength = i - 2;
String boundary = new String(line, 0, boundaryLength); //-2丢弃换行字符
fields = new Hashtable();while (i != -1) {String newLine = new String(line, 0, i);
if (newLine.startsWith("Content-Disposition: form-data; name=\"")) {
if (newLine.indexOf("filename=\"") != -1) {
setFilename(new String(line, 0, i-2));if (filename==null)return;
i = in.readLine(line, 0, 1280);setContentType(new String(line, 0, i-2));
i = in.readLine(line, 0, 1280);i = in.readLine(line, 0, 1280); //空行
newLine = new String(line, 0, i,"ISO8859_1");
FileOutputStream pw=new FileOutputStream((savePath==null? "" : savePath) + filename);
//PrintWriter pw = new PrintWriter(new BufferedWriter(new
//FileWriter((savePath==null? "" : savePath) + filename)));
while (i != -1 && !newLine.startsWith(boundary)) {
// 文件内容的最后一行包含换行字符// 因此我们必须检查当前行是否是最
i = in.readLine(line, 0, 1280); // 后一行
if ((i==boundaryLength+2 || i==boundaryLength+4)&& (new String(line, 0, i).startsWith(boundary)))
pw.write(newLine.substring(0, newLine.length()-2).getBytes("ISO8859_1"));
else pw.write(newLine.getBytes("ISO8859_1"));
newLine = new String(line, 0, i,"ISO8859_1");}pw.close();}else {// 普通表单输入元素
int pos = newLine.indexOf("name=\"");// 获取输入元素名字
String fieldName = newLine.substring(pos+6, newLine.length()-3);
i = in.readLine(line, 0, 1280);i = in.readLine(line, 0, 1280);
newLine = new String(line, 0, i);StringBuffer fieldValue = new StringBuffer(1280);
while (i != -1 && !newLine.startsWith(boundary)) {// 最后一行包含换行字符
i = in.readLine(line, 0, 1280); // 因此我们必须检查当前行是否是最后一行
if ((i==boundaryLength+2 || i==boundaryLength+4) && (new String(line, 0, i).startsWith(boundary)))
fieldValue.append(newLine.substring(0, newLine.length()-2));else fieldValue.append(newLine);
newLine = new String(line, 0, i);}fields.put(fieldName, fieldValue.toString());
}}i = in.readLine(line, 0, 1280);}}}