js 获取tomcat根路径

@WebServlet("/getRootPath")
public class GetRootPathServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String rootPath = request.getContextPath();
        response.setContentType("text/plain");
        response.getWriter().write(rootPath);
    }
}

fetch('/getRootPath')
    .then(response => response.text())
    .then(rootPath => {
        console.log('Tomcat Root Path:', rootPath);
    })
    .catch(error => console.error('Error:', error));

<script type="text/javascript">
    var rootPath = '<%= request.getContextPath() %>';
</script>

console.log('Tomcat Root Path:', rootPath);

response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
response.setHeader("Access-Control-Allow-Headers", "Content-Type");