在springboot中如何使用filter(过滤器)，其实这个现实可以用aop来实现。
代码语言：javascript复制1.定义LogFilter.javapackage com.niugang.filter;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import ... 大家好，我是架构君，一个会写代码吟诗的架构师。今天说一说10.Spring-Boot中如何使用filter(过滤器),希望能够帮助大家进步!!!
在springboot中如何使用filter(过滤器)，其实这个现实可以用aop来实现。
1.定义LogFilter.java
代码语言：javascript复制package com.niugang.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.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 记录日志的filter
* @author niugang
*
*/
public class LogFilter implements Filter {
private static Logger logger = LoggerFactory.getLogger(LogFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
logger.info("初始化filter");
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest req =(HttpServletRequest)request;
HttpServletResponse resp =(HttpServletResponse)response;
logger.info("执行filter................");
chain.doFilter(req, resp);
}
@Override
public void destroy() {
logger.info("filter被销毁");
}
}
package com.niugang.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.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 记录日志的filter
* @author niugang
*
*/
public class LogFilter implements Filter {
private static Logger logger = LoggerFactory.getLogger(LogFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
logger.info("初始化filter");
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest req =(HttpServletRequest)request;
HttpServletResponse resp =(HttpServletResponse)response;
logger.info("执行filter................");
chain.doFilter(req, resp);
}
@Override
public void destroy() {
logger.info("filter被销毁");
}
}2.配置filter
FilterConfig.java
代码语言：javascript复制此代码由Java架构师必看网-架构君整理
package com.niugang;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.niugang.filter.LogFilter;
/**
* 过滤器配置文件
* @author niugang
*springboot启动类虎自动扫描过滤器配置文件
*/
@Configuration
public class FilterConfig {
/**
* z自定义过滤器
* @return
*/
@Bean
public LogFilter logFilter() {
return new LogFilter();
}
/**
* 注册过滤器
* @return
*/
@Bean
public FilterRegistrationBean testFilterRegistration() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(logFilter());
registration.addUrlPatterns("/*");
registration.setOrder(1);
return registration;
}
}
