整合方式一：通过注解扫描完成 Filter 组件的注册
1、编写filter
package com.bjsxt.filter;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;
/**
* Created by Administrator on 2019/2/4.
*/
@WebFilter(filterName = "FirstFilter",urlPatterns = {"/first"}) //filter名字和拦截的路径
public class FirstFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
System.out.println("进入FirstFilter.......");
filterChain.doFilter(servletRequest,servletResponse);
System.out.println("离开FirstFilter.......");
}
@Override
public void destroy() {
}
}
2、编写启动类
package com.bjsxt;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
/**
* Created by Administrator on 2019/2/4.
*/
@SpringBootApplication
@ServletComponentScan //在springboot启动时，会扫描@WebServlet、@WebFilter等，并将该类实例化
public class App {
public static void main(String[] args){
SpringApplication.run(App.class,args);
}
}
整合方式二：通过方法完成 Filter 组件的注册
1、编写filter
package com.bjsxt.filter;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;
/**
* Created by Administrator on 2019/2/4.
*/
public class SecondFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
System.out.println("进入SecondFilter.......");
filterChain.doFilter(servletRequest,servletResponse);
System.out.println("离开SecondFilter.......");
}
@Override
public void destroy() {
}
}
2、编写启动类
package com.bjsxt;
import com.bjsxt.filter.SecondFilter;
import com.bjsxt.servlet.SecondServlet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
/**
* Created by Administrator on 2019/2/4.
*/
@SpringBootApplication
public class App2 {
public static void main(String[] args){
SpringApplication.run(App2.class,args);
}
/**
* 注册Servlet
* @return
*/
@Bean
public ServletRegistrationBean getServletRegistrationBean(){
ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet());
bean.addUrlMappings("/second");
return bean;
}
/**
* 注册Filter
* @return
*/
@Bean
public FilterRegistrationBean getFilterRegistrationBean(){
FilterRegistrationBean bean = new FilterRegistrationBean(new SecondFilter());
bean.addUrlPatterns(new String[]{"/second"});
return bean;
}
}
