我想用jsp上传含中文名的文件，该怎么办？？

pilchard · 发表于 2004-12-30 11:24:36

上传到服务器以后中文显示不出来？

eTony · 发表于 2004-12-30 11:42:02

我用的 o'reilly 的上传组件没有问题

nscwf · 发表于 2004-12-30 12:06:36

我有个办法，把文件名用POST记下来，上传之后，再更名回来

hantsy · 发表于 2004-12-30 13:42:55

我用struts上传没有问题，

fangshun · 发表于 2005-1-6 08:47:51

上传的字节流转换String时需要转码！！！

fangshun · 发表于 2005-1-6 08:53:38

/**
* 文件上传进行代理服务，阻止不符合上传规范的文件进入。
* 使用单实例创建，外部调用只有通过工厂方法才可以创建唯一的代理实例。
* @author fangshun
* @see FileUploadFactroy
*/
public class FileUploadProxy implements FileUpload {
/**
   * 外部调用只有通过工厂方法才可以创建唯一的代理实例。
   */
protected FileUploadProxy()  {}

/**
   * 上传方法<tt>upload</tt>的代理验证，阻止不符合规范的上传方式，
   * 实现接口的方法。
   * @param request 需要得到从上传页面传来的request对象。
   *
   * @param pathName 服务器存放上传文件的绝对路径，
   * 这可能来自你自己的指定，或者来自你要解析的某个已经配置好的配置文件
   * 例如WEB-INF下的某个目录的xml配置文件
   *
   * @param sizeMax 需要上传的文件总体的容量，这里使用long类型，以满足
   * 能支持大容量的文件上传，请注意：上传参数sizeMax的最小单位为'K'
   *
   * @throws Exception
   * @see FileUpload
   */
public void upload(HttpServletRequest request, String pathName, long sizeMax)
      throws Exception {
      // TODO Auto-generated method stub
      if ((request == null) || (pathName == null)) {
         throw new NullPointerException("parameter");
      }

      if (sizeMax < 0) {
         throw new FileSizeException("File Require Size ");
      } else {
         //从request中获取上下文内容尺度
         int requestSize = request.getContentLength();

         //为传来的最大容量乘以1024，获得符合以'K'为单位的尺度
         long sizeMax_K = sizeMax << 10;

         //String pathNameCN = new String(pathName.getBytes("utf-8"), "gb2312");
         //如果传来的尺度大于上传的最大限度
         if (requestSize > sizeMax_K) {
            throw new SizeLimitExceededException(
                  "the request was rejected because " +
                  "it's size exceeds allowed range");
         }
         String contentType = request.getContentType();
         //如果传来的条件符合代理类的要求，执行上传操作！！！
         JetStepFileUpload upload = JetStepFileUpload.getInstance();

         upload.processUpload(request, pathName, sizeMax_K);
      }
}

/**
   * 上传实现细节
   * 内隐类实现
   * @author fangshun
   */
private static class JetStepFileUpload {
private static JetStepFileUpload upload;

/**
   * 外界对象不能进行实例化，私有创建对象。
   */
private JetStepFileUpload() { }

private static JetStepFileUpload getInstance() {
if(upload == null) {
upload = new JetStepFileUpload();
}
return upload;
}

      /**
      * 上传实现
   * @param request 需要得到从上传页面传来的request对象。
   *
   * @param pathName 服务器存放上传文件的绝对路径，
   * 这可能来自你自己的指定，或者来自你要解析的某个已经配置好的配置文件
   * 例如WEB-INF下的某个目录的xml配置文件
   *
   * @param sizeMax 需要上传的文件总体的容量，这里使用long类型，以满足
   * 能支持大容量的文件上传，参数sizeMax的最小单位为'K'
   * @throws Exception
      */
      private void processUpload(HttpServletRequest request, String filePath, long sizeMax)
         throws Exception {
        DiskFileUpload fu = new DiskFileUpload();
         String encoding = request.getCharacterEncoding();
         fu.setHeaderEncoding(encoding);
         // If file size exceeds, a FileUploadException will be thrown
         fu.setSizeMax(sizeMax);

         List fileItems = fu.parseRequest(request);
         Iterator itr = fileItems.iterator();

         while (itr.hasNext()) {
            FileItem fi = (FileItem) itr.next();
            String fileName = fi.getName();
            if(fileName == null || fileName.equals("")) {
            continue;
            }
            System.out.println("no convert" + fileName);
            //fileName = new String(fileName.getBytes(), "utf-8");
            // fileName = new String(fileName.getBytes(), "gb2312");
            System.out.println("fileName" + fileName);
            //Check if not form field so as to only handle the file inputs
            //else condition handles the submit button input
            if (!fi.isFormField()) {
                  File file = new File(fileName);
                  File fNew = new File(filePath, file.getName());

                    fi.write(fNew);

            } else {
                  System.out.println("Field =" + fi.getFieldName());
            }
         }
      }

}

}

L0veyou · 发表于 2005-1-7 20:36:29

这是一个用Bean的文件上传JSP,可以识别各种编码.
uploadfile.jsp:
[PHP]

<%@ page language="java"%>
<%@ page contentType="text/HTML;charset=GB2312"%>
<jsp:useBean id="fub" scope="page" class="mybean.FileUploadBean" />

<%
String Dir = "D:\\WWW\\testing\\test"; //保存文件的路径，请确保目录存在，或改到其他目录
//通过调用JavaBeans的方法完成上传操作
fub.setUploadDirectory(Dir);
fub.uploadFile(request);
out.print("<center><font color=red>文件上载成功!</font></center>");
%>

[/PHP]

FileUploadBean.java

[PHP]
package mybean;

import java.io.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletException;

public class FileUploadBean{
private static String newline = "\r\n";       //设定换行符
private String uploadDirectory = ".";       //默认的保存位置
private String ContentType = "";          //文件类型
private String CharacterEncoding = "";    //编码格式

//设定文件要保存在服务器中的位置
public void setUploadDirectory(String s){
uploadDirectory = s;
}
//提取文件名，本方法是把用户上传的文件按照原名保存
private String getFileName(String s){
int i = s.lastIndexOf("\\");
if(i < 0 || i >= s.length() - 1){
i = s.lastIndexOf("/");
if(i < 0 || i >= s.length() - 1)
return s;
}
return s.substring(i + 1);
}

//得到content-type
public void setContentType(String s){
ContentType = s;
int j;
if((j = ContentType.indexOf("boundary=")) != -1){
ContentType = ContentType.substring(j + 9);
ContentType = "--" + ContentType;
}
}
//得到文件编码格式
public void setCharacterEncoding(String s){
CharacterEncoding = s;
}

public void uploadFile( HttpServletRequest req) throws ServletException, IOException{
setCharacterEncoding(req.getCharacterEncoding());
setContentType(req.getContentType());
uploadFile(req.getInputStream());
}

public void uploadFile( ServletInputStream servletinputstream) throws ServletException, IOException{

String s5 = null;
String filename = null;
byte Linebyte[] = new byte[4096];
byte outLinebyte[] = new byte[4096];
int ai[] = new int[1];
int ai1[] = new int[1];

String line;
//得到文件名
while((line = readLine(Linebyte, ai, servletinputstream, CharacterEncoding)) != null){
int i = line.indexOf("filename=");
if(i >= 0){
line = line.substring(i + 10);
if((i = line.indexOf("\"")) > 0)
line = line.substring(0, i);
break;
}
}

filename = line;

if(filename != null && !filename.equals("\"")){
filename = getFileName(filename);

String sContentType = readLine(Linebyte, ai, servletinputstream, CharacterEncoding);
if(sContentType.indexOf("Content-Type") >= 0)
readLine(Linebyte, ai, servletinputstream, CharacterEncoding);

//建立新文件的文件句柄
File file = new File(uploadDirectory, filename);

//建立生成新文件的输出流
FileOutputStream fileoutputstream = new FileOutputStream(file);

while((sContentType = readLine(Linebyte, ai, servletinputstream, CharacterEncoding)) != null){
if(sContentType.indexOf(ContentType) == 0 && Linebyte[0] == 45)
break;

if(s5 != null){
//写入新文件
fileoutputstream.write(outLinebyte, 0, ai1[0]);
fileoutputstream.flush();
}
s5 = readLine(outLinebyte, ai1, servletinputstream, CharacterEncoding);
if(s5 == null || s5.indexOf(ContentType) == 0 && outLinebyte[0] == 45)
break;
fileoutputstream.write(Linebyte, 0, ai[0]);
fileoutputstream.flush();
}

byte byte0;
if(newline.length() == 1)
byte0 = 2;
else
byte0 = 1;
if(s5 != null && outLinebyte[0] != 45 && ai1[0] > newline.length() * byte0)
fileoutputstream.write(outLinebyte, 0, ai1[0] - newline.length() * byte0);
if(sContentType != null && Linebyte[0] != 45 && ai[0] > newline.length() * byte0)
fileoutputstream.write(Linebyte, 0, ai[0] - newline.length() * byte0);
fileoutputstream.close();
}
}

//readLine函数把表单提交上来的数据按行读取
private String readLine(byte Linebyte[], int ai[],ServletInputStream servletinputstream,String CharacterEncoding){
try{ //读取一行
ai[0] = servletinputstream.readLine(Linebyte, 0, Linebyte.length);
if(ai[0] == -1)
return null;
}catch(IOException ex){
return null;
}
try{
if(CharacterEncoding == null){
//用默认的编码方式把给定的byte数组转换为字符串
return new String(Linebyte, 0, ai[0]);
}else{
//用给定的编码方式把给定的byte数组转换为字符串
return new String(Linebyte, 0, ai[0], CharacterEncoding);
}
}catch(Exception ex){
return null;
}
}
}

[/PHP]

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