上传的日文和中文文件名编码问题 [英] Uploaded filename encoding issue for Japanese and Chinese

问题描述

我目前正在使用 jQuery-File-Upload 。我可以上传一些带有日文或中文文件名的文件，我可以看到文件名是例如在浏览器调试模式下的お疲れ様です.txt或测试文档.txt，但是在后端（Java） ，它们变成ã Šç-²ã,,æ§~㠧㠙.txt和æμ<试æ-‡æ¡£.txt。
我曾经试过将 formAcceptCharset 设置为 UTF-8 ，但不起作用。

问题：

如何获取正确的文件名Java端解析MultipartFormData？

预先感谢。

BTW，以下是我的资料

  ----------------------------- 25382434931419 
内容-Disposition：form-data; name =file; filename =ã？Šç-²ã,,æ§~ã？§ã？™.txt
 Content-Type：text / plain 
 .... 
  
 
 
 
  添加Java代码  
 
事实上， Java侧目前，
  @POST 
 @Consumes（MediaType.MULTIPART_FORM_DATA）
 public String上传（InMultiPart inMP）{
 while（inMP.hasNext（））{
 InPart part = inMP.next（）; 
 MultivaluedMap< String，String> headers = part.getHeaders（）; 
 String fileName = null; 
 if（！headers.containsKey（Content-Disposition））{
 continue; 
} else {
 //获取文件名
 fileName = parseFileName（headers.getFirst（Content-Disposition））; 
} 
 // ..... 
} 
 // ...... 
} 
 
 private String parseFileName String disposition）{
 int fileNameIndex = disposition.indexOf（filename =）; 
 if（fileNameIndex< 0）{
 return null; 
} 
 int start = disposition.indexOf（\，fileNameIndex）+ 1; 
 int end = disposition.indexOf（\，start）; 
 return disposition.substring（start，end）; 
} 
  
 
 
解决方案
可以用来获得正确的编码。我们在JBOSS 7.1.1上遇到了这个问题，并实现了一个过滤器。 
 
 
 
在web xml 
 < filter& 
< display-name>设置字符编码< / display-name> 
< filter-name> RequestEncodingFilter< / filter-name> 
< filter-class> com.myapp.RequestEncodingFilter< / filter-class> 
< init-param> 
< param-name> encoding< / param-name> 
< param-value> UTF-8< / param-value> 
< / init-param> 
< / filter> 
< filter-mapping> 
< filter-name> RequestEncodingFilter< / filter-name> 
< url-pattern> / *< / url-pattern> 
< / filter-mapping> 
  
筛选器类别：
  public class RequestEncodingFilter implements Filter {
 
 private static final String ENCODING =encoding; 
 private String configuredEncoding; 
 
 @Override 
 public void init（FilterConfig filterConfig）throws ServletException {
 configuredEncoding = filterConfig.getInitParameter（ENCODING）; 
} 
 
 @Override 
 public void doFilter（ServletRequest servletRequest，ServletResponse servletResponse，FilterChain filterChain）throws IOException，ServletException {
 servletRequest.setCharacterEncoding（configuredEncoding）; 
 filterChain.doFilter（servletRequest，servletResponse）; 
} 
 
 @Override 
 public void destroy（）{
} 
  
} 
 
I am currently using the jQuery-File-Upload. I may upload some files with a Japanese or Chinese file name, and I can see that the file name is for example, "お疲れ様です.txt" or "测试文档.txt" in browser's debug mode, but in the backend(Java), they become "ã�Šç–²ã‚Œæ§˜ã�§ã�™.txt" and "测试文档.txt".

I once tried to set formAcceptCharset to UTF-8 but it does not work.

Question:

How to get the correct file name in Java side when parsing the MultipartFormData? 

Thanks in advance.

BTW, The following is my data  
-----------------------------25382434931419
Content-Disposition: form-data; name="file"; filename="�疲れ様��.txt"
Content-Type: text/plain
....
Add the Java codes

In fact I did nothing in Java side currently, 
@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
public String upload(InMultiPart inMP) {
    while (inMP.hasNext()) {
        InPart part = inMP.next();
        MultivaluedMap<String, String> headers = part.getHeaders();
        String fileName = null;
        if (!headers.containsKey("Content-Disposition")) {
            continue;
        } else {
            // get the file name here
            fileName = parseFileName(headers.getFirst("Content-Disposition"));
        }
        //.....
    }
    //......
}

private String parseFileName(String disposition) {
    int fileNameIndex = disposition.indexOf("filename=");
    if (fileNameIndex < 0) {
        return null;
    }
    int start = disposition.indexOf("\"", fileNameIndex) + 1;
    int end = disposition.indexOf("\"", start);
    return  disposition.substring(start, end);
}

解决方案
As Stephen C said a filter can be used to get the right encoding. We had this problem on JBOSS 7.1.1 and implemented a filter. 

In web xml
<filter>
    <display-name>set character encoding</display-name>
    <filter-name>RequestEncodingFilter</filter-name>
    <filter-class>com.myapp.RequestEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>RequestEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
Filter class:
public class RequestEncodingFilter implements Filter {

private static final String ENCODING = "encoding";
private String configuredEncoding;

@Override
public void init(FilterConfig filterConfig) throws ServletException {
    configuredEncoding = filterConfig.getInitParameter(ENCODING);
}

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    servletRequest.setCharacterEncoding(configuredEncoding);
    filterChain.doFilter(servletRequest, servletResponse);
}

@Override
public void destroy() {
}
}

                        
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