java runtime plugin: encoding error of HttpRequest.body

[QuanMaiXiaoMianBao]

background

I create my java runtime ext-plugin-pre-req, but when i get the body from HttpRequest, the body has garbled characters.

apisix plugin config

plugin code

@RequiredArgsConstructor
@Component
public class ApiFilter implements PluginFilter {

    public static void main(String[] args) {
        System.out.println(new String("၂၀၂၄-၀၂-၂၃T၁၀:၅၅:၂၃+08:00"
                .getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1));
        // ����-��-��T��:��:��+08:00
    }

    @Override
    public void filter(HttpRequest request, HttpResponse response, PluginFilterChain chain) {
        System.out.println(request.getBody()); // ����-��-��T��:��:��+08:00
        // should be: ၂၀၂၄-၀၂-၂၃T၁၀:၅၅:၂၃+08:00

    }

    @Override
    public String name() {
        return "ApiFilter";
    }

    @Override
    public Boolean requiredBody() {
        return true;
    }
}

plugin application.yaml

Dockerfile

FROM --platform=linux/amd64 openjdk:21-jdk-slim as java
FROM apache/apisix:3.7.0-redhat
COPY --from=java /usr/local/openjdk-21 /jdk
ENV JAVA_HOME /jdk
ENV PATH ${JAVA_HOME}/bin:$PATH
COPY api-1.0.0.jar /plugins/api.jar