jspSmartUpload组件上传下载文件时中文乱码问题(转)

    这次用jspSmartUpload做文件上传下载，该组件默认是GBK编码，当上传的文件名为中文时，我将文件名getBytes()下，将GBK改成 UTF-8。测试了下，貌似没问题，突然有一次上传一文件时，发现最后几个字乱码，一直是??。在拿些文件测试，后来知道了是当文件名为中文奇数时，会乱 码，而且还上传不了。再做测试，找原因，查看字符的长度，转成16进制看结果。觉得是jspSmartUpload组件对中文支持不足的问题。

    在网上找解决方法。下了几个jar，都说解决中文乱码，彻底解决中文乱码！！！用到我这就都不管用，而且也看到很多回复说解决不了，乱码问题还是依旧！！！

    这次自己找到jspSm的源代码，参考了网上的意见，自己稍微修改了下。发现能解决中文乱码问题，分享给和我遇到同样问题的朋友们！！！

        1：当页面上传有参数时，中文会乱码，解决页面上中文参数乱码方法：

            修改类SmartUpload()中的upload()方法         

public void upload() throws ServletException,IOException,SmartUploadException {
        int i = 0;
        //boolean flag = false;
        boolean flag1 = false;
        //boolean flag2 = false;
        long l = 0L;
        //String s = "";//new String();
        //String s2 = "";//new String();
        String s4 = ""; //new String();
        String s5 = ""; //new String();
        String s6 = ""; //new String();
        String s7 = ""; //new String();
        String s8 = ""; //new String();
        String s9 = ""; //new String();
        String s10 = ""; //new String();
        m_totalBytes = m_request.getContentLength();
        m_binArray = new byte[m_totalBytes];
        int j;
        for(;i < m_totalBytes;i += j)
        {
            try
            {
                m_request.getInputStream();
                j = m_request.getInputStream().read(m_binArray,i,m_totalBytes - i);
            }
            catch(Exception exception)
            {
                throw new SmartUploadException("Unable to upload.");
            }
        }

        for(;!flag1 && m_currentIndex < m_totalBytes;m_currentIndex++)
        {
            if(m_binArray[m_currentIndex] == 13)
            {
                flag1 = true;
            }
            else
            {
                m_boundary = m_boundary + (char)m_binArray[m_currentIndex];
            }
        }
        if(m_currentIndex == 1)
        {
            return;
        }
        for(m_currentIndex++;m_currentIndex < m_totalBytes;m_currentIndex = m_currentIndex + 2)
        {
            String s1 = getDataHeader();
            m_currentIndex = m_currentIndex + 2;
            boolean flag3 = s1.indexOf("filename") > 0;
            String s3 = getDataFieldValue(s1,"name");
            if(flag3)
            {
                s6 = getDataFieldValue(s1,"filename");
                s4 = getFileName(s6);
                s5 = getFileExt(s4);
                s7 = getContentType(s1);
                s8 = getContentDisp(s1);
                s9 = getTypeMIME(s7);
                s10 = getSubTypeMIME(s7);
            }
            getDataSection();
            if(flag3 && s4.length() > 0)
            {
                if(m_deniedFilesList.contains(s5))
                {
                    throw new SecurityException("The extension of the file is denied to be uploaded (1015).");
                }
                if(!m_allowedFilesList.isEmpty() && !m_allowedFilesList.contains(s5))
                {
                    throw new SecurityException("The extension of the file is not allowed to be uploaded (1010).");
                }
                if(m_maxFileSize > 0L && (long)((m_endData - m_startData) + 1) > m_maxFileSize)
                {
                    throw new SecurityException("Size exceeded for this file : " + s4 + " (1105).");
                }
                l += (m_endData - m_startData) + 1;
                if(m_totalMaxFileSize > 0L && l > m_totalMaxFileSize)
                {
                    throw new SecurityException("Total File Size exceeded (1110).");
                }
            }
            if(flag3)
            {
                SmartFile file = new SmartFile();
                file.setParent(this);
                file.setFieldName(s3);
                file.setFileName(s4);
                file.setFileExt(s5);
                file.setFilePathName(s6);
                file.setIsMissing(s6.length() == 0);
                file.setContentType(s7);
                file.setContentDisp(s8);
                file.setTypeMIME(s9);
                file.setSubTypeMIME(s10);
                if(s7.indexOf("application/x-macbinary") > 0)
                {
                    m_startData = m_startData + 128;
                }
                file.setSize((m_endData - m_startData) + 1);
                file.setStartData(m_startData);
                file.setEndData(m_endData);
                m_files.addFile(file);
            }
            else
            {
                /**
                 * 原来的代码，当页面上要传入中文参数时，乱码。
                 */
                //String s11 = new String(m_binArray,m_startData,(m_endData - m_startData) + 1);
         
                /**
                  * 2008-10-28 carton修改，解决页面传入中文参数乱码
                  */

                String s11 = new String(m_binArray,m_startData,(m_endData - m_startData) + 1, "utf-8");
                m_formRequest.putParameter(s3,s11);
            }
            if((char)m_binArray[m_currentIndex + 1] == '-')
            {
                break;
            }
        }
    }

    2:当上传时文件名为中文时，解决中文乱码

    修改类SmartUpload()中的getDataHeader()方法

private String getDataHeader()
    {
        //boolean flag = false;
        int i = m_currentIndex;
        int j = 0;
        for(boolean flag1 = false;!flag1;)
        {
            if(m_binArray[m_currentIndex] == 13 && m_binArray[m_currentIndex + 2] == 13)
            {
                flag1 = true;
                j = m_currentIndex - 1;
                m_currentIndex = m_currentIndex + 2;
            }
            else
            {
                m_currentIndex++;
            }
        }

        /**
         * 原代码，当上传文件名为中文时，乱码
        */

        //String s = new String(m_binArray,i,(j - i) + 1);
        //return s;

        /**
         * 2008-10-28 carton 修改，解决上传文件中文乱码问题
         */
        Stirng s = null;
        try {
             s = new String(m_binArray,i,(j - i) + 1, "utf-8");
        } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
        }
        return s;
    }