req.getParameter returns values wrong character encoding

I'm trying to get values from a JSP using getParameter which includes ü,é,à etc. But get wrong values in servlet. I've checked the content type with firebug and found that

Content-Type    text/html;charset=UTF-8

checked the POST section with firebug and found the correct value there, when I try to access it in servlet it is wrong. Gives ö instead of ö

req.getCharacterEncoding(); 

returns null.

Tried with setting 开发者_JAVA技巧

 req.setCharacterEncoding("UTF-8");

at the beginning of servlet but didn't help.

edited:

req.getParameter("myValue").getBytes("8859_1"), "utf-8")

above line gives correct value.

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From http://wiki.apache.org/tomcat/FAQ/CharacterEncoding

The character set for HTTP query strings (that's the technical term for 'GET parameters') can be found in sections 2 and 2.1 the "URI Syntax" specification. The character set is defined to be US-ASCII. Any character that does not map to US-ASCII must be encoded in some way. Section 2.1 of the URI Syntax specification says that characters outside of US-ASCII must be encoded using % escape sequences: each character is encoded as a literal % followed by the two hexadecimal codes which indicate its character code. Thus, a (US-ASCII character code 97 = 0x61) is equivalent to %61. There is no default encoding for URIs specified anywhere, which is why there is a lot of confusion when it comes to decoding these values.

The page does mention 2 possible ways to influence this behavior when running on a Tomcat servlet running:

• Set the URIEncoding attribute on the element in server.xml to something specific (e.g. URIEncoding="UTF-8").
• Set the useBodyEncodingForURI attribute on the element in server.xml to true. This will cause the Connector to use the request body's encoding for GET parameters.

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adding the following to web.xml fixed the issue...

<filter>
    <filter-name>charsetFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
</filter>

<filter-mapping>
    <filter-name>charsetFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>