Feign Page对象解析

ibizlab-boot-starter/src/main/java/cn/ibizlab/util/client/FeignPageDecoder.java

+package cn.ibizlab.util.client;
+
+import com.alibaba.fastjson.util.ParameterizedTypeImpl;
+import com.google.common.collect.Lists;
+import feign.FeignException;
+import feign.Response;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.ObjectFactory;
+import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
+import org.springframework.cloud.openfeign.support.SpringDecoder;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageImpl;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.List;
+
+@Slf4j
+@Component
+public class FeignPageDecoder extends SpringDecoder {
+
+    public FeignPageDecoder(ObjectFactory<HttpMessageConverters> messageConverters) {
+        super(messageConverters);
+    }
+
+    @Override
+    public Object decode(final Response response, Type type)
+            throws IOException, FeignException {
+        if (type instanceof ParameterizedType && ((ParameterizedType) type).getRawType() == Page.class) {
+            try {
+                ((ParameterizedType) type).getActualTypeArguments()[0].getClass();
+                ParameterizedTypeImpl ss = new ParameterizedTypeImpl(((ParameterizedType) type).getActualTypeArguments(), null, List.class);
+                Object ret = super.decode(response, ss);
+                return new PageImpl((List) ret,
+                        PageRequest.of(
+                                Integer.parseInt(response.headers().get("x-page").toArray()[0].toString()),
+                                Integer.parseInt(response.headers().get("x-per-page").toArray()[0].toString()))
+                        , Long.parseLong(response.headers().get("x-total").toArray()[0].toString()));
+            } catch (Exception e) {
+                log.error("FeignDecode转换Page发生错误：" + e.getMessage());
+                return new PageImpl(Lists.newArrayList(), PageRequest.of(0, 0), 0);
+            }
+        }
+        return super.decode(response, type);
+    }
+}
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