Filter理解

web中Filter通过<init-param>添加参数。
web。xml中的配置:
　<filter>

   <filter-name>AuthFilter</filter-name>

   <filter-class>com.interact.filter.AuthFilter</filter-class>
   <init-param>
      <param-name>ignores</param-name>
      <param-value>getWorkOrderReqRow,todayWorkOrder,login2.do,queryFeedBack.do,addFeedBack.do,validatePermit.do</param-value>
   </init-param>
</filter>
<filter-mapping>
   <filter-name>AuthFilter</filter-name>
   <url-pattern>*.do</url-pattern>
</filter-mapping>

后台代码：直接添加属性，通过get、set方法进行获取以及设置。通过"this."调用

public class AuthFilter implements Filter {
    private String ignores;

    public String getIgnores() {
        if(this.ignores == null){
            return "";
        }
        return ignores;
    }

    public void setIgnores(String ignores) {
        this.ignores = ignores;
    }

　　@Override
　　public void init(FilterConfig filterConfig) throws ServletException {
    　　this.ignores = filterConfig.getInitParameter("ignores");
　　}

    public boolean isIgnore(String uri){
        for(String s : this.getIgnores().split(",")){
            if(uri.contains(s)){
                return true;
            }
        }
        return false;
    }
}

后续继续研究......

https://blog.csdn.net/yuzhiqiang_1993/article/details/81288912

https://blog.csdn.net/liuyueyi25/article/details/79189405

https://www.jianshu.com/p/cd2b02ce9bee