如何在Spring中修改响应的ReadOnlyHttpHeaders？

Question

RestTemplate.exchange返回带有ReadOnlyHttpHeaders的ResponseEntity。我想添加/修改这些标题，但是由于它是只读的，我该怎么做？

Answer 1

如果上述答案对您不起作用，请尝试以下

HttpHeaders httpHeaders = HttpHeaders.writableHttpHeaders(httpEntity.getHeaders());

Answer 2

HttpHeaders实现MultiValueMap，您可以创建一个新的可变HttpHeaders，其中包括ReadOnlyHttpHeaders并进行以下修改：

        HttpHeaders readOnlyHttpHeaders = ...

        HttpHeaders mutableHttpHeaders = new HttpHeaders(readOnlyHttpHeaders);
        mutableHttpHeaders.put("foo", List.of("bar"));

Answer 3

for(i=0;i<point.Count;i++){
   x1 += point[i].X1;
   x2 += point[i].X2;
}
meanx1 = x1 / point.Count;
meanx2 = x2 / point.Count;
for(i=0;i<point.Count;i++){
   totalX1 += Math.Pow(point[i].X1 - meanx1, 2);
   totalX2 += Math.Pow(point[i].X2 - meanx2, 2);
}
normX1 = totalX1 / (point.Count - 1);
normX2 = totalX2 / (point.Count - 1);

normX1 = normX1 / 100;
normX2 = normX2 / 100;

并且mutatedExchange将具有带有新键：值对的标头。