几种JSP上传文件代码

JSP上传文件类
package com.vogoal.util;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Hashtable;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
/*
* vogoalAPI 1.0
* Auther SinNeR@
* by vogoal.com
* mail: [email protected]
*/
/**
* JSP上传文件类
*
* @author SinNeR
* @version 1.0
*/
public class JspFileUpload {
    /** request对象 */
    private HttpServletRequest request = null;
    /** 上传文件的路径 */
    private String uploadPath = null;
    /** 每次读取得字节的大小 */
    private static int BUFSIZE = 1024 * 8;
    /** 存储参数的Hashtable */
    private Hashtable paramHt = new Hasp教程table();
    /** 存储上传的文件的文件名的ArrayList */
    private ArrayList updFileArr = new ArrayList();
    /**
     * 设定request对象。
     *
     * @param request
     *            HttpServletRequest request对象
     */
    public void setRequest(HttpServletRequest request) {
        this.request = request;
    }
    /**
     * 设定文件上传路径。
     *
     * @param path
     *            用户指定的文件的上传路径。
     */
    public void setUploadPath(String path) {
        this.uploadPath = path;
    }
    /**
     * 文件上传处理主程序。�������B
     *
     * @return int 操作结果 0 文件操作成功；1 request对象不存在。 2 没有设定文件保存路径或者文件保存路径不正确；3
     *         没有设定正确的enctype；4 文件操作异常。
     */
    public int process() {
        int status = 0;
        // 文件上传前，对request对象，上传路径以及enctype进行check。
        status = preCheck();
        // 出错的时候返回错误代码。
        if (status != 0)
            return status;
        try {
            // ��参数或者文件名�u��
            String name = null;
            // 参数的value
            String value = null;
            // 读取的流是否为文件的标志位
            boolean fileFlag = false;
            // 要存储的文件。
            File tmpFile = null;
            // 上传的文件的名字
            String fName = null;
            FileOutputStream baos = null;
            BufferedOutputStream bos = null;
            // ��存储参数的Hashtable
            paramHt = new Hashtable();
            updFileArr = new ArrayList();
            int rtnPos = 0;
            byte[] buffs = new byte[BUFSIZE * 8];
            // �取得ContentType
            String contentType = request.getContentType();
            int index = contentType.indexOf("boundary=");
            String boundary = "--" + contentType.substring(index + 9);
            String endBoundary = boundary + "--";
            // �从request对象中取得流。
            ServletInputStream sis = request.getInputStream();
            // 读取1行
            while ((rtnPos = sis.readLine(buffs, 0, buffs.length)) != -1) {
                String strBuff = new String(buffs, 0, rtnPos);
                // 读取1行数据�n��
                if (strBuff.startsWith(boundary)) {
                    if (name != null && name.trim().length() > 0) {
                        if (fileFlag) {
                            bos.flush();
                            baos.close();
                            bos.close();
                            baos = null;
                            bos = null;
                            updFileArr.add(fName);
                        } else {
                            Object obj = paramHt.get(name);
                            ArrayList al = new ArrayList();
                            if (obj != null) {
                                al = (ArrayList) obj;
                            }
                            al.add(value);
                            System.out.println(value);
                            paramHt.put(name, al);
                        }
                    }
                    name = new String();
                    value = new String();
                    fileFlag = false;
                    fName = new String();
                    rtnPos = sis.readLine(buffs, 0, buffs.length);
                    if (rtnPos != -1) {
                        strBuff = new String(buffs, 0, rtnPos);
                        if (strBuff.toLowerCase().startsWith(
                                "content-disposition: form-data; ")) {
                            int nIndex = strBuff.toLowerCase().indexOf(
                                    "name="");
                            int nLastIndex = strBuff.toLowerCase().indexOf(
                                    """, nIndex + 6);
                            name = strBuff.substring(nIndex + 6, nLastIndex);
                        }

                        int fIndex = strBuff.toLowerCase().indexOf(
                                "filename="");
                        if (fIndex != -1) {
                            fileFlag = true;
                            int fLastIndex = strBuff.toLowerCase().indexOf(
                                    """, fIndex + 10);
                            fName = strBuff.substring(fIndex + 10, fLastIndex);
                            fName = getFileName(fName);
                            if (fName == null || fName.trim().length() == 0) {
                                fileFlag = false;
                                sis.readLine(buffs, 0, buffs.length);
                                sis.readLine(buffs, 0, buffs.length);
                                sis.readLine(buffs, 0, buffs.length);
                                continue;
                            }else{
                                fName = getFileNameByTime(fName);
                                sis.readLine(buffs, 0, buffs.length);
                                sis.readLine(buffs, 0, buffs.length);
                            }
                        }
                    }
                } else if (strBuff.startsWith(endBoundary)) {
                    if (name != null && name.trim().length() > 0) {
                        if (fileFlag) {
                            bos.flush();
                            baos.close();
                            bos.close();
                            baos = null;
                            bos = null;
                            updFileArr.add(fName);
                        } else {
                            Object obj = paramHt.get(name);
                            ArrayList al = new ArrayList();
                            if (obj != null) {
                                al = (ArrayList) obj;
                            }
                            al.add(value);
                            paramHt.put(name, al);
                        }
                    }
                } else {
                    if (fileFlag) {
                        if (baos == null && bos == null) {
                            tmpFile = new File(uploadPath + fName);
                            baos = new FileOutputStream(tmpFile);
                            bos = new BufferedOutputStream(baos);
                        }
                        bos.write(buffs, 0, rtnPos);
                        baos.flush();
                    } else {
                        System.out.println("test :" + value + "--" + strBuff);
                        value = value + strBuff;
                    }
                }
            }
        } catch (IOException e) {
            status = 4;
        }
        return status;
    }
    private int preCheck() {
        int errCode = 0;
        if ( request == null )
            return 1;
        if ( uploadPath == null || uploadPath.trim().length() == 0 )
            return 2;
        else{
            File tmpF = new File(uploadPath);
            if (!tmpF.exists())
                return 2;
        }
        String contentType = request.getContentType();
        if ( contentType.indexOf("multipart/form-data") == -1 )
            return 3;
        return errCode;
    }
    public String getParameter(String name){
        String value = "";
        if ( name == null || name.trim().length() == 0 )
            return value;
        value = (paramHt.get(name) == null)?"":(String)((ArrayList)paramHt.get(name)).get(0);
        return value;
    }
    public String[] getParameters(String name){
        if ( name == null || name.trim().length() == 0 )
            return null;
        if ( paramHt.get(name) == null )
            return null;
        ArrayList al = (ArrayList)paramHt.get(name);
        String[] strArr = new String[al.size()];
        for ( int i=0;i             strArr[i] = (String)al.get(i);
        return strArr;
    }
   
    public int getUpdFileSize(){
        return updFileArr.size();
    }
   
    public String[] getUpdFileNames(){
        String[] strArr = new String[updFileArr.size()];
        for ( int i=0;i             strArr[i] = (String)updFileArr.get(i);
        return strArr;
    }
    private String getFileName(String input){
        int fIndex = input.lastIndexOf("");
        if (fIndex == -1) {
            fIndex = input.lastIndexOf("/");
            if (fIndex == -1) {
                return input;
            }
        }
        input = input.substring(fIndex + 1);
        return input;
    }
    private String getFileNameByTime(String input){
        int index = input.indexOf(".");
        Date dt = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        return input.substring(0,index) + sdf.format(dt) + input.substring(index);
    }
}
%>

 

在jsp教程页面中引用这个类
<%@page import="com.vogoal.util.JspFileUpload"%>

<%
    //初始化
    JspFileUpload jfu = new JspFileUpload();
    //设定request对象
    jfu.setRequest(request);
    //设定上传的文件路径
    jfu.setUploadPath("C:");
    //上传处理
    int rtn = jfu.process();
    //取得form中其他input控件参数的值
    String username = jfu.getParameter("username");
    //如果对应同一个参数有多个input控件，返回数组
    String[] usernameArr = jfu.getParameters("username");
    //取得上传的文件的名字
    String[] fileArr = jfu.getUpdFileNames();
    //取得上传文件的个数，这个方法有点鸡肋
    int fileNumber = jfu.getUpdFileSize();
//下面的是测试输出的代码。
//       out.println("parameter:" + username);
//       out.println("parameter size:" + usernameArr.length);
//       out.println("fileArr size:" + fileArr.length);
//       if (fileArr.length > 0)
//              out.println("fileArr 0:" + fileArr[0]);
%>

文件上传代码二

//实例化上载bean
  SmartUpload mySmartUpload=new SmartUpload();
  //初始化
  mySmartUpload.initialize(pageContext); 
  //设置上载的最大值,注意:如果这里设置过大会出现问题!
  mySmartUpload.setMaxFileSize(500 * 1024*1024);
  //上载文件
  mySmartUpload.upload();
  //循环取得所有上载的文件
  for (int i=0;i   //取得上载的文件
  com.jsps教程mart.upload.File myFile = mySmartUpload.getFiles().getFile(i);
  if (!myFile.isMissing())
  {
  //取得上载的文件的文件名
  String myFileName=myFile.getFileName();
  //取得不带后缀的文件名
  String suffix=myFileName.substring(0,myFileName.lastIndexOf('.'));
  //取得后缀名
  String ext= mySmartUpload.getFiles().getFile(0).getFileExt();  
  //取得文件的大小  
  int fileSize=myFile.getSize();
  //保存路径
  String aa=getServletContext().getRealPath("/")+"jsp";
  String trace=aa+myFileName;
  //取得别的参数
  String explain=(String)mySmartUpload.getRequest().getParameter("text");
  String send=(String)mySmartUpload.getRequest().getParameter("send");
  //将文件保存在服务器端 
  myFile.saveAs(trace,mySmartUpload.SAVE_PHYSICAL);

 

文件上传代码三

公司:

选择要上载的文件

注意，

标记有一个enctype属性，属性值是"MULTIPART/FORM-DATA"。还有个type为file的输入框是用来选择上传文件的。

表单的action属性值是upjsp.jsp，这是将请求发送给upjsp.jsp文件。upjsp.jsp调用了名为UpBean的JavaBean。

程序如下：

<%

TheBean.doUpload(request);

%>

 

　　下面是UpBean的实现代码：

import java.io.*;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.ServletInputStream;

 

public class UpBean {

 

public void doUpload(HttpServletRequest request) throws

IOException {

PrintWriter pw = new PrintWriter(

new BufferedWriter(new FileWriter("test.txt")));

ServletInputStream in = request.getInputStream();

 

int i = in.read();

while (i != -1) {

pw.print((char) i);

i = in.read();

}

pw.close();

}

}

这个JavaBean把HttpServletRequest对象的表单原始数据写入test.txt文件.