I am struggling with encoding of jspf files. When I insert a german umlaut (e.g. "ä") in the jspf the output in the browser is broken (some unreadable character).

I start Spring Boot from within eclipse, the jspf file itself is encoded as UTF-8.

Note that this issue only applies to jspf files. With jsp files everything is working fine as they contain the page directive <%@ page contentType="text/html;charset=UTF-8"%>.

This is what I tried so far (none of them worked):

• Insert spring.http.encoding.charset=UTF-8, spring.http.encoding.enabled=true, spring.http.encoding.force=true in application.properties
• Insert server.servlet.encoding.charset=UTF-8, server.servlet.encoding.enabled=true, server.servlet.encoding.force=true in application.properties
• Use -Dfile.encoding=UTF-8 as JVM arg
• Use a CharacterEncodingFilter

The only working option is to insert page directive in the jspf file:

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

But this has to be inserted in every jspf file. I'm looking for some global option.

CodePudding user response：

By default the JSPF Encoding its ISO-8859-1, the solution you found is the correct to change the encoding, and as you say could be a pain modify every single file. The ways I know for change that in the easiest way is adding this to your web.xml

<jsp-config>
<jsp-property-group>
    <url-pattern>/*</url-pattern>
    <page-encoding>UTF-8</page-encoding>
</jsp-property-group>

Or change the context of your application server, idk if you are using Tomcat or another one.

CodePudding user response：

The solution provided cannot be applied directly to Spring Boot as it doesn't "have" a web.xml.

Instead you have to configure the property group programmatically:

@Component
public class JspContextCustomizer implements TomcatContextCustomizer {
  @Override
  public void customize(Context context) {
    JspPropertyGroup group = new JspPropertyGroup();
    group.addUrlPattern("/*");
    group.setPageEncoding("UTF-8");
    context.setJspConfigDescriptor(new JspConfigDescriptorImpl(
      Collections.singletonList(new JspPropertyGroupDescriptorImpl(group)),
      Collections.emptyList()));
  } 
}

This works!