springboot 过滤器 -代码

版权声明：本文为wcuu原创文章。 https://blog.csdn.net/wcuuchina/article/details/86352988

 总的过滤器，设置过滤器顺序

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.ArrayList;
import java.util.List;

/**
 * @author wangwei
 * @version v1.0.0
 * @description 总过滤器
 * @date 2019-10-12
 */
@Configuration
public class FilterConfig {

    @Bean
    public FilterRegistrationBean buildBFilter() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setOrder(2);
        filterRegistrationBean.setFilter(new SignFilter());
        filterRegistrationBean.setName("SignFilter");
        filterRegistrationBean.addUrlPatterns("/*");
        return filterRegistrationBean;
    }

    @Bean
    public FilterRegistrationBean buildCFilter() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setOrder(3);
        filterRegistrationBean.setFilter(new LoginValidateFilter());
        filterRegistrationBean.setName("LoginValidateFilter");
        filterRegistrationBean.addUrlPatterns("/*");
        return filterRegistrationBean;
    }

}

分过滤器

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

/**
 * @author wangwei
 * @version v1.0.0
 * @description 签名过滤器, 签名不拦截open下的接口
 * @date 2019-01-12
 */
@Component
@WebFilter(filterName="SignFilter", urlPatterns="/*")
@RefreshScope
public class SignFilter implements Filter {

    @Value("${version}")
    private String version;

    @Override
    public void init(javax.servlet.FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");

        String path = request.getRequestURI();

        if(path.indexOf("/api/open/")> -1 ){
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        Map<String, String> map = SignUtil.toVerifyMap(request.getParameterMap(),false);
        String secretKey =  map.get("secretKey");
        if (StringUtils.isEmpty(secretKey) || !map.get("secretKey").equals(SignUtil.getInstance().secretkey)){
            System.out.println("secretKey is err");
            PrintWriter writer = null;
            servletResponse.setCharacterEncoding("UTF-8");
            servletResponse.setContentType("text/html; charset=utf-8");
            try {
                writer = servletResponse.getWriter();
                String userJson = "{\"code\":\" "+ ErrorCode.CODE_431.getCode() +"\", \"message\": \""+ ErrorCode.CODE_431.getMessage() +"\"}";
                writer.print(userJson);
            } catch (IOException e1) {
            } finally {
                if (writer != null)
                    writer.close();
            }
        }
        if (SignUtil.getInstance().verify(map)){
            // 签名成功
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }else {
            PrintWriter writer = null;
            servletResponse.setCharacterEncoding("UTF-8");
            servletResponse.setContentType("text/html; charset=utf-8");
            try {
                writer = servletResponse.getWriter();
                String userJson = "{\"code\":\" "+ ErrorCode.CODE_430.getCode() +"\", \"message\": \""+ ErrorCode.CODE_430.getMessage() +"\"}";
                writer.print(userJson);
            } catch (IOException e1) {
            } finally {
                if (writer != null)
                    writer.close();
            }
        }


    }

    @Override
    public void destroy() {

    }
}

分过滤器2 

import com.alibaba.druid.support.json.JSONUtils;
import io.jsonwebtoken.Claims;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;

/**
 * @author wangwei
 * @version v1.0.0
 * @description 登录验证过滤器Filter
 * @date 2019-01-10
 */
@Component
@WebFilter(filterName="LoginValidateFilter", urlPatterns="/*")
@RefreshScope
public class LoginValidateFilter implements Filter {

    @Value("${version}")
    private String version;

    @Override
    public void init(javax.servlet.FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        String token = ((HttpServletResponse) servletResponse).getHeader("token");
        if(StringUtils.isBlank(token)) {
            token = servletRequest.getParameter("token");
        }
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");

        String path = request.getRequestURI();

        if(path.indexOf("/api/open/")> -1 ){
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        if(StringUtils.isNotBlank(token)) {
            // 判断是否过期 没有过期在header更新token
            try{
                Claims claims = JWTUtils.parseJWT(token);
                ((HttpServletResponse) servletResponse).setHeader("token", JWTUtils.createJWT(claims.getId(), claims.getIssuer(), claims.getSubject(), 1000 * 60 * 30));
                filterChain.doFilter(servletRequest, servletResponse);
            } catch (Exception e) {
                PrintWriter writer = null;
                servletResponse.setCharacterEncoding("UTF-8");
                servletResponse.setContentType("text/html; charset=utf-8");
                try {
                    writer = servletResponse.getWriter();
                    String userJson = "{\"code\":\" "+ ErrorCode.UNLOGIN_ERROR.getCode() +"\", \"message\": \""+ ErrorCode.UNLOGIN_ERROR.getMessage() +"\"}";
                    writer.print(userJson);
                } catch (IOException e1) {
                } finally {
                    if (writer != null)
                        writer.close();
                }
            }
        } else {
            PrintWriter writer = null;
            servletResponse.setCharacterEncoding("UTF-8");
            servletResponse.setContentType("text/html; charset=utf-8");
            try {
                writer = servletResponse.getWriter();
                String userJson = "{\"code\":\" "+ ErrorCode.PARAMETER_CHECK_ERROR.getCode() +"\", \"message\": \""+ ErrorCode.PARAMETER_CHECK_ERROR.getMessage() +"\"}";
                writer.print(userJson);
            } catch (IOException e1) {
            } finally {
                if (writer != null)
                    writer.close();
            }
        }
    }

    @Override
    public void destroy() {
    }
}