Java – special character encoding of errors using resteasy

I am using JBoss EAP 6.3 to develop a web application using resteasy rest framework. There is a bad coding problem with the special characters I pass in formparam in post resources, such as:

@POST
@Path("/post")
public Response createTask(@FormParam("param") String param) {
    LOGGER.info("HELLO POST XML. "+param);

    return Response.ok(param).build();

}

If I pass something like ABC è è è, I will get something like "ABC ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ195

What should I do?

thank you

Solution

Resteasy solution

Since resteasy uses servlets to interpret the request to you, it is best to use servlet filters to set the request character encoding:

public class CharacterEncodingFilter implements javax.servlet.Filter {

  // ...

  @Override
  public void doFilter(ServletRequest request,ServletResponse response,FilterChain filterChain) throws IOException,ServletException {
    request.setCharacterEncoding("UTF-8");
    filterChain.doFilter(request,response);
  }
}

How to set charset for my web application?

JBoss solution

To ensure that the application server receives the request parameters in the correct encoding from the client request, you must configure the connector For JBoss as (before version 7), change:

<jboss_install>/server/deploy/jbossweb.sar/server.xml

Or in other JBoss as versions:

<jboss_install>/server/(default)/deploy/jboss-web.deployer/server.xml

Set connector uriencoding:

<Connector port="8080" URIEncoding="UTF-8" />

Refer to JBoss seam documentation: 16.1 internationalizing your app

By changing the standalone. In JBoss as 7 and later XML (such as this answer (also answered in JBoss Developer Forum)) to complete this configuration

Server independent solution

Since the above solutions are dependent on JBoss, my answer will not be complete without providing a server independent solution

The most basic is to use the context parameter to indicate the character encoding selection of all forms in the application Set context parameters in WEB-INF / Web XML file

<context-param>
  <param-name>PARAMETER_ENCODING</param-name>
  <param-value>UTF-8</param-value>
</context-param>

Your application can then read context parameters and set the request character encoding before reading any request parameters You can set the request encoding using java servlet or JSP syntax:

<%
  String paramEncoding = application.getInitParameter("PARAMETER_ENCODING");
  request.setCharacterEncoding(paramEncoding);
  String name = request.getParameter("NAME");
%>

Refer to character conversions from browser to database

Database participation

You may still need to set the character encoding of the database, otherwise you may lose information, as shown in the following figure:

Refer to character conversions from browser to database

miscellaneous

For other information, see character encoding JSP - displayed wrong in JSP but not in URL. Tomcat is HttpServletRequest – SetCharacterEncoding seems to do nothing

You can also set the default encoding for the JVM

In resteasy version 2.3 7 fixed the error titled "text responses should default to charset UTF-8"