Problem with enctype="multipart/form-data" and UTF-8 combination in struts

Get Started
1

We are facing an issue when we combine the both features (enctype=“multipart/form-data” and UTF-8) in one JSP page. The application is developed with MySQL database. We are executing a command “SET NAMES ‘utf8’” at MySQL end to enable UTF-8 feature.

Usage of feature enctype=“multipart/form-data”: - fileUpload
Usage of feature UTF-8: - Multi-language support

The above features are working perfectly individually, but failed when we try to combine them. Please let me know if anybody have ideas to handle this issue in a smooth way. Thanks in advance.

2

I have added the following configurable lines in MySQL’s my.ini file.

default-collation=utf8
collation_server=utf8_unicode_ci
character_set_server=utf8
default-character-set=utf8

But, JSP page is not displaying the special characters perfectly.

3

this is very interesting problem. I’m afraid I don’t have any clue on this. Perhaps, it is a known bug in JSP. Try to upgrade to latest web server you’re using and see if that works.

4

I am using Tomcat 5.0 for my application.

5

try using latest struts or tomcat

6

try using <%@ page contentType=“text/html; charset=UTF-8” %> in your JSP

7

Previously, my application is working fine with UTF-8 feature with the following settings.

<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>

and

<meta http-equiv="content-type" content="text/html; charset=UTF-8">

Newly, I have added the fileUpload feature to the same JSP pages. Now, JSP page is not displaying the content (Japanese characters) correctly.

8

I’ve implemented the filter and it works nice. We can use a request filter instead of updating the code in each and every JSP and SERVLET.

CharacterEncodingFilter.java


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.ServletException;
import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.FilterChain;

import java.io.IOException;

public class CharacterEncodingFilter implements Filter
{
	
	private FilterConfig fc;
	
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException
	{
		
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		
		response.setContentType("text/html; charset=UTF-8");
		request.setCharacterEncoding("UTF8");
		
		chain.doFilter(request, response);        //do it again, since JSPs will set it to the default
		
		response.setContentType("text/html; charset=UTF-8");
		request.setCharacterEncoding("UTF8");
	}
	
	public void init(FilterConfig filterConfig)
	{
		
		this.fc = filterConfig;
	}
	
	public void destroy()
	{
		
		this.fc = null;
	}
}

web.xml

	
<filter>
  <filter-name>CharacterEncodingFilter</filter-name>
  <filter-class>com.its.struts.action.CharacterEncodingFilter</filter-class>
</filter>

<filter-mapping>
  <filter-name>CharacterEncodingFilter</filter-name>
  <servlet-name>action</servlet-name>
</filter-mapping>

<filter-mapping>
  <filter-name>CharacterEncodingFilter</filter-name>
  <url-pattern>*.jsp</url-pattern>
</filter-mapping>

<filter-mapping>
  <filter-name>CharacterEncodingFilter</filter-name>
  <url-pattern>*.html</url-pattern>
</filter-mapping>
9