Java 使用过滤器重定向跳转_过滤器重定向到首页

实现Filter接口，重写doFilter方法

public class AuthorVerifyFilter implements Filter {

    private FilterConfig config;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        this.config = filterConfig;
    }
    
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;
        HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
        //跳转至首页
        if(true){
            httpResponse.sendRedirect(httpRequest.getContextPath()+ "/index.action");
            return;
        }
        filterChain.doFilter(httpRequest,httpResponse);
    }

    @Override
    public void destroy() {
        this.config = null;
    }
}

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在web.xml中配置filter

<filter>
	<filter-name>AuthorVerifyFilter</filter-name>
	<filter-class>com.module.filter.AuthorVerifyFilter</filter-class>
	<init-param>
		<param-name>loginPage</param-name>
		<param-value>/login.action</param-value>
	</init-param>
</filter>
<filter-mapping>
	<filter-name>AuthorVerifyFilter</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>
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