SpringBoot整合SpringMVC之Servlet,Filter,Listener
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目录
概 述
应用场景：在使用的第三方类库，更多的提供的是java.servlet中的组件，不用与SpringMVC 耦合
eg:eg：shiro权限认证：需要配置shiro提供的ShiroFilterFactoryBean
总的实现过程：
配置：
bean的方式: 在mvc的配置类中，添加三大组件的配置，
ServletRegistrationBean --> Servlet
FilterRegistrationBean --> Filter
ServletListenerRegistrationBean -->Listener
注册的方式
Servlet -->extend HttpServlet @WebServlet(urlPatterns = “/test/02”)
Filter -->implements Filter @WebFilter("/test/*")
Listener --> implements ServletContextListener @WenListener
相关工具如下：
```java
@Bean
public ServletRegistrationBean testServlet01() {
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean<>(new HttpServlet() {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
logger.info("[doGet][uri: {}]",req.getRequestURI());
}
});
servletRegistrationBean.setUrlMappings(Collections.singleton("/test/01"));
return servletRegistrationBean;
}
@Bean
public FilterRegistrationBean testFilter01() {
FilterRegistrationBean<Filter> filterFilterRegistrationBean = new FilterRegistrationBean<>(new Filter() {
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
logger.info("[doFilter]");
filterChain.doFilter(servletRequest,servletResponse);
}
});
filterFilterRegistrationBean.setUrlPatterns(Collections.singleton("/test/*"));
return filterFilterRegistrationBean;
}
@Bean
public ServletListenerRegistrationBean testListener01() {
return new ServletListenerRegistrationBean<>(new ServletContextListener() {
@Override
public void contextInitialized(ServletContextEvent sce) {
logger.info("[contextInitialized]");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
}
});
}
### 注解：
```java
@WebServlet(urlPatterns = "/test/02")
public class TestServlet02 extends HttpServlet {
private Logger logger = LoggerFactory.getLogger(getClass());
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
logger.info("[doGet][uri: {}]", req.getRequestURI());
}
}
Testiter 02 的方法
@WebFilter("/test/*")
public class TestFilter02 implements Filter {
private Logger logger = LoggerFactory.getLogger(getClass());
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
logger.info("[doFilter]");
filterChain.doFilter(servletRequest, servletResponse);
}
@WebListener
public class TestServletContextListener02 implements ServletContextListener {
private Logger logger = LoggerFactory.getLogger(getClass());
@Override
public void contextInitialized(ServletContextEvent sce) {
logger.info("[contextInitialized]");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
}
}
Spring BootCommonreultApplcaition
@SpringBootApplication
@ServletComponentScan
public class SpringbootSpringmvcCommonresultApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootSpringmvcCommonresultApplication.class, args);
}
分析：
小结：
参考资料和推荐阅读
1.链接: link.