一、问题出现场景

项目从http升级到https后，jsp页面存在发送http请求的情况下就会出现该异常。因为HTTPS 是 HTTP over Secure Socket Layer，以安全为目标的 HTTP 通道，所以在 HTTPS 承载的页面上不允许出现 http 请求。

二、解决办法

在jsp页面中，添加下面的meta头就可以了

<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests" />

<%@ page language="java" contentType="text/html; charset=UTF-8"

         pageEncoding="UTF-8" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

    <meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">

</head>

<body>

<script type="text/javascript">

</script>

</body>

</html>

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