文章摘要
本文介绍了一种基于JAX-RS的过滤器实现，用于在Spring Boot应用中控制特定请求的路由逻辑。通过自定义的`MyFilter`类实现了过滤功能，可以在请求处理时根据预设条件（如请求URI和会话信息）决定是否将请求重定向到登录页面。这种实现方式能够有效提高应用的安全性和用户体验，确保只有符合特定条件的请求能够触发相应的业务逻辑。
package com.baidu.web;
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;
public class MyFilter implements Filter{
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
//对请求request进行处理
HttpServletResponse resp=(HttpServletResponse)response;
HttpServletRequest req=(HttpServletRequest) request;
String username=(String) req.getSession().getAttribute(“username”);
if(req.getRequestURI().contains(“Buy”) || req.getRequestURI().contains(“collect”)){
if(username==null || username.equals(“”)){ //满足过滤要求，进行处理
req.getRequestDispatcher(“/login.jsp”).forward(req, resp);
return;
}
}
chain.doFilter(req, resp);
//对相应response进行处理
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
//filterConfig，通过filterConfig的getServletContext() 方法可以获得 ServletContext
}
}