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配置方式
过滤器
(1)自定义过滤器TestFilter
public class TestFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)throws IOException, ServletException {
chain.doFilter(request, response);
}
@Override
public void destroy() {
}
}
(2)配置
@Bean
public FilterRegistrationBean testFilterRegistration() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new TestFilter());
registration.addUrlPatterns(”/*”);
registration.addInitParameter(”paramName”, “paramValue”);
registration.setName(”testFilter”);
registration.setOrder(1);
return registration;
}
Servlet
(1)自定义
public class TestServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
this.doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//...
}
}
(2)配置
@Bean
public ServletRegistrationBean test2ServletRegistrationBean(){
ServletRegistrationBean registration = new ServletRegistrationBean(new TestServlet());
registration.setEnabled(true);
registration.addUrlMappings("/servlet/test");
return registration;
}
监听器
(1)自定义
public class TestListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
}
}
(2)配置
@Bean
public ServletListenerRegistrationBean servletListenerRegistrationBean(){
ServletListenerRegistrationBean servletListenerRegistrationBean = new ServletListenerRegistrationBean();
servletListenerRegistrationBean.setListener(new TestListener());
return servletListenerRegistrationBean;
}
注解方式
入口类添加注解扫描:@ServletComponentScan
过滤器
@WebFilter(urlPatterns = "/*", filterName = "testFilter")
public class TestFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
filterChain.doFilter(servletRequest,servletResponse);
}
@Override
public void destroy() {
}
}
监听器
@WebListener
public class TestListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
}
@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {
}
}
Servlet
@WebServlet(name = "testServlet",urlPatterns = "/test")
public class TestServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
this.doGet(req, resp);
}
}