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修改tomcat目录下的webapps/ROOT/index.jsp文件
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<script>
window.location.href='http://localhost:8080/项目名/';
</script>
</body>
</html>