Get Parameter Encoding

Question

I have a problem using spring mvc and special chars in a GET request. Consider the following method:

@RequestMapping("/update")
public Object testMethod(@RequestParam String name) throws IOException {
    }

to which I send a GET request with name containing an "ä" (german umlaut), for instance. It results in spring receiving "Ã¤" because the browser maps "ä" to %C3%A4.

So, how can I get the correct encoded string my controller?

Thanks for your help!

How is the URL encoded? There's only one standard encoding here: utf-8, %-encoded as needed. — bmargulies, Mar 26 '11 at 23:13
do you want to return a utf8 in controller. if yes you have to re_encode url. — Amir, Aug 09 '20 at 18:02

score 44 · Answer 1 · answered Mar 31 '11 at 15:00

44

You're having this problem, because the request differentiates between body encoding and URI encoding. A CharacterEncodingFilter sets the body encoding, but not the URI encoding.

You need to set URIEncoding="UTF-8" as an attribute in all your connectors in your Tomcat server.xml. See here: http://tomcat.apache.org/tomcat-6.0-doc/config/ajp.html

Or, alternatively, you can set useBodyEncodingForURI="True".

If you're using the maven tomcat plugin, just add this parameter:

mvn -Dmaven.tomcat.uriEncoding=UTF-8 tomcat:run

answered Mar 31 '11 at 15:00

vicox

541
3
4

2

I am using Tomcat directly without a connector. Can the solution you described still work? – Erik Apr 04 '11 at 08:22
I didn't now I would need it on the connector tag as well. Just had it on the context tag before. Thanks alot! – nilsi Mar 25 '14 at 12:45
1

Why don§t they have default as UTF-8? – Hurda May 05 '14 at 13:01
To all the people using [webapp-runner](https://github.com/jsimone/webapp-runner) this can be achieved by adding `--uri-encoding UTF-8` parameter – Jagger Jan 23 '15 at 12:20
1

in server.xml files set – Silvio Troia Jun 03 '15 at 15:16

score 7 · Accepted Answer · answered Mar 27 '11 at 00:53

What about this? Could it help?

In your web.xml:

    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>com.example.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>

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

com.example.CharacterEncodingFilter:

public class CharacterEncodingFilter implements Filter {

    protected String encoding;

    public void init(FilterConfig filterConfig) throws ServletException {
        encoding = filterConfig.getInitParameter("encoding");
    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
            FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        request.setCharacterEncoding(encoding);

        filterChain.doFilter(servletRequest, servletResponse);
    }

    public void destroy() {
        encoding = null;
    }

}

I have already tried the filter org.springframework.web.filter.CharacterEncodingFilter which comes with spring and does what you describe. Unfortunately without a result. — Erik, Mar 27 '11 at 11:11
Perhaps the data coming from the browser *is not utf-8* because the form page *is not utf-8*. — bmargulies, Mar 28 '11 at 15:01
For later readers: I tried this but it works only with POST not with GET. — stacker, May 13 '13 at 08:54

Get Parameter Encoding

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