springboot 过滤器 -代码

川长思鸟来 2022-03-26 21:09 212阅读 0赞

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() {
        }
    }