在用jspsmartupload组件进行文件上传下载的时候,如果用户选择的是含有中文名字的文件名或是文件路径含有中文,则会出现乱码.经过一段时间的调试,本人已经初步解决了这个问题.现将解决的代码贴出来.
一、上传
在SmartUpload.java文件中,增加一个属性private String charset用于进行字符编码转换,相应的有两个方法:
public void setCharset(String charset)
{
this.charset = charset;
}
public String getCharset()
{
return this.charset;
}
另外改动二个地方:
在upload()方法中,将String s11 = new String(m_binArray,m_startData,(m_endData - m_startData) + 1);改为
String s11 = new String(m_binArray,m_startData,(m_endData - m_startData) + 1,this.getCharset());
这个时候我们应该在进行处理上传的jsp中进行设置
SmartUpload su = new SmartUpload();
su.setCharset("UTF-8");
就可以了.
在getDataHeader()方法中,将String s = new String(m_binArray, i, (j - i) + 1);改为
String s;
try
{
s = new String(m_binArray, i, (j - i) + 1,this.getCharset());
}
catch(Exception e)
{
s = "";
}
在SmartFile.java文件中,增加一个属性private String charset用于进行字符编码转换,相应的有两个方法:
public void setCharset(String charset)
{
this.charset = charset;
}
public String getCharset()
{
return this.charset;
}
另外需要改动一个地方
在getContentString()方法中,将String s = new String(m_parent.m_binArray,m_startData,m_size);改为
String s;
try
{
s = new String(m_parent.m_binArray,m_startData,m_size,this.getCharset());
}
catch(Exception e)
{
s = "";
}
对于SmartFile.java文件中,本人认为可改可不改,不会对上传有什么影响.
经过如此改动源代码后,对于中文乱码问题有很好的解决能力.
二、下载
在SmartUpload.java文件中,将downloadFile(String s, String s1, String s2, int i)方法改为
public void downloadFile(String s, String s1, String s2, int i)
throws ServletException, IOException, SmartUploadException
{
if(s == null)
throw new IllegalArgumentException("File '" + s +
"' not found (1040).");
if(s.equals(""))
throw new IllegalArgumentException("File '" + s +
"' not found (1040).");
if(!isVirtual(s) && m_denyPhysicalPath)
throw new SecurityException("Physical path is
denied (1035).");
if(isVirtual(s))
s = m_application.getRealPath(s);
java.io.File file = new java.io.File(s);
FileInputStream fileinputstream = new FileInputStream(file);
long l = file.length();
boolean flag = false;
int k = 0;
byte abyte0[] = new byte[i];
if(s1 == null)
m_response.setContentType("application/x-msdownload");
else if(s1.length() == 0)
m_response.setContentType("application/x-msdownload");
else
m_response.setContentType(s1);
m_response.setContentLength((int)l);
m_contentDisposition = m_contentDisposition != null ? m_contentDisposition : "attachment;";
if(s2 == null)
m_response.setHeader("Content-Disposition", m_contentDisposition + " filename=" + toUtf8String(getFileName(s)));
else
if(s2.length() == 0)
m_response.setHeader("Content-Disposition", m_contentDisposition);
else
m_response.setHeader("Content-Disposition", m_contentDisposition + " filename=" + toUtf8String(s2));
while((long)k < l)
{
int j = fileinputstream.read(abyte0, 0, i);
k += j;
m_response.getOutputStream().write(abyte0, 0, j);
}
fileinputstream.close();
}
另外需要增加一个获得汉字字符的UTF-8编码的方法
/**
* 将文件名中的汉字转为UTF8编码的串,以便下载时能正确显示另存的文件名.
* 雨亦奇2003.08.01
* @param s 原文件名
* @return 重新编码后的文件名
*/
public static String toUtf8String(String s) {
StringBuffer sb = new StringBuffer();
for (int i=0;i<s.length();i++) {
char c = s.charAt(i);
if (c >= 0 && c <= 255) {
sb.append(c);
} else {
byte[] b;
try {
b = Character.toString(c).getBytes("utf-8");
} catch (Exception ex) {
System.out.println(ex);
b = new byte[0];
}
for (int j = 0; j < b.length; j++) {
int k = b[j];
if (k < 0) k += 256;
sb.append("%" + Integer.toHexString(k).toUpperCase());
}
}
}
return sb.toString();
}