Check the HTTP response headers with a tool.
使用工具检查HTTP响应标头。
HTTP response headers are omitted because, in many cases, they are not important to the content being displayed.
HTTP头部省略掉了，原因是在很多情况下，它们对于显示的内容并不重要。
The response object lets you set HTTP response headers and provides a writer identified with out in the JSP code.
response 对象允许您设置 HTTP 响应头并提供一个写入程序，该程序使用 JSP 代码中的 out 标识。
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