Springboot支持filter（过滤器）
2018-12-19 本文已影响0人
庙人
1:定义filter类
package com.duck.filter;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
@WebFilter(filterName = "duckFilter",urlPatterns = "/filter/*")
public class DuckFilter implements javax.servlet.Filter {
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest)request;
System.out.println(req.getRequestURL() + "------>doFilter");
chain.doFilter(request, response);
}
public void destroy() {
// TODO Auto-generated method stub
}
}
2：定义启动类 @ServletComponentScan
package com.duck.filter;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
@WebFilter(filterName = "duckFilter",urlPatterns = "/filter/*")
public class DuckFilter implements javax.servlet.Filter {
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest)request;
System.out.println(req.getRequestURL() + "------>doFilter");
chain.doFilter(request, response);
}
public void destroy() {
// TODO Auto-generated method stub
}
}
3：访问定义的urlmapping,后台就会调用到filter
此例可访问 http://localhost:8080/filter，后台打印日志
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