Springboot配置过滤器实现过程解析

Springboot配置过滤器实现过程解析

写一个继承类

启动器扫一下

此时访问一下页面就可以观察到过滤器的信息

代码

package com.example.demo.Filter;

import lombok.extern.slf4j.Slf4j;

import javax.servlet.*;

import javax.servlet.annotation.WebFilter;

@Slf4j

@WebFilter(filterName = "myFilter1", urlPatterns = "/*")

public class MyFilter1 implements Filter {

@Override

public void init(FilterConfig filterConfig) throws ServletException {

log.info(filterConfig.getFilterName() + " init,过滤器初始化成功！");

}

@Override

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) {

log.info("myFilter1 begin");

try {

log.info("业务方法执行");

chain.doFilter(request, response);

} catch (Exception e) {

log.error(http://"error!", e);

}

log.info("myFilter1 end");

}

@Override

public void destroy() {

}

}

启动器

package com.example.demo;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletComponentScan;

@SpringBootApplication(scanBasePackages = {"com.example"})

@MapperScan("com.example.demo.mapper")

@ServletComponentScan(basePackages = "com.example.demo.Filter")

public class Demo10Application {

public static void main(String[] args) {

SpringApplication.run(Demo10http://Application.class, args);

}

}

结果

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