价格趋势

 package com.yohoufo.product.model;
 
+import com.alibaba.fastjson.JSONObject;
+
 import java.math.BigDecimal;
+import java.util.Objects;
+import java.util.Optional;
 
 /**
  * Created by li.ma on 2019/1/8.
@@ -93,6 +97,19 @@ public class PriceTrendResp {
         return null != this.endTime && this.endTime.equals(resp.getEndTime());
     }
 
+    @Override
+    public int hashCode() {
+        if (Objects.isNull(this.endTime)) {
+            return super.hashCode();
+        }
+        return this.endTime.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        return JSONObject.toJSONString(this);
+    }
+
     public static class Builder {
         private Integer id;
 

@@ -53,6 +53,10 @@ public class ProductPriceService implements ApplicationContextAware{
 
         LOG.info("priceTrendModels result is {}", priceTrendModels.size());
 
+        if (priceTrendModels.size() <= 1) {
+            return Lists.newArrayList();
+        }
+
         List<PriceTrendResp> result = Lists.newArrayList();
         priceTrendModels.stream().forEach(item ->
             result.add(new PriceTrendResp.Builder().setProductId(item.getProductId())

+package com.yohoufo.order;
+
+import com.google.common.collect.Lists;
+import com.yohoufo.product.model.PriceTrendResp;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * Created by li.ma on 2019/1/17.
+ */
+public class Test11 {
+    public static void main(String[] args) {
+        List<PriceTrendResp> result = Lists.newArrayList();
+
+        PriceTrendResp resp =new PriceTrendResp();
+        resp.setEndTime("2019-01-09 00:00:00");
+        resp.setProductId(1002512);
+        result.add(resp);
+
+        PriceTrendResp resp1 =new PriceTrendResp();
+        resp1.setEndTime("2019-01-09 00:00:00");
+        resp1.setProductId(46346346);
+        result.add(resp1);
+
+        List<PriceTrendResp> collect = result.stream().distinct().collect(Collectors.toList());
+
+        System.out.println(collect);
+    }
+}