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1.通过注解的方式实现filter注册
1.1 编写filter
package com.cloudtech.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
@WebFilter(filterName="HelloFilter",urlPatterns="/do")
public class HelloFilter implements Filter{
public void init(FilterConfig filterConfig) throws ServletException {
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
System.out.println("进入了HelloFilter");
chain.doFilter(request, response);
System.out.println("离开了HelloFilter");
}
public void destroy() {
}
}
package com.cloudtech.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 测试spring boot注解方式整合HelloServlet
* @ClassName: HelloServlet
* @Description:
* @author wude
* @date 2018年12月7日
*
*/
@WebServlet(name="helloServlet",urlPatterns="/do")
public class HelloServlet extends HttpServlet{
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("helloServlet.....");
//super.doGet(req, resp);
}
}
注意，urlPatterns都是/do
1.2 编写启动类
package com.cloudtech;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
/**
* springboot启动类
* @ClassName: App
* @Description:
* @author wude
* @date 2018年12月6日
*
*/
@SpringBootApplication
@ServletComponentScan //在spring boot启动时，会扫描@webServlet,并将该类实例化
public class App2 {
public static void main(String[] args) {
SpringApplication.run(App2.class, args);
}
}
1.3 观察控制台输出
perfect ！！！