filter过滤器获取init-param参数_filter init-param

    <filter-name>**Filter</filter-name>
    <filter-class>*Filter</filter-class>
    <init-param>
        <param-name>URL</param-name>
        <param-value>http://localhost:7005</param-value>
    </init-param>
</filter>`
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获取 init-param结点的值

@Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("init()...............");
        this.URL = filterConfig.getInitParameter("URL");
        System.out.println("URL:" + URL);


    }
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