【开发CV】常用收藏

这里写目录标题

SpringBoot整合Redis

配置

一、依赖二、配置类redis配置(默认没有密码) SpringBoot整合JWT

工具

一、依赖二、Utils 微服务整合Sentinel

配置

一、依赖二、配置阿里短信整合

配置

一、依赖二、Util HttpClient[前后端请求用]

配置

一、依赖二、Util 开启Mapper扫包

配置

一、Maven二、application 开启XML扫包

配置

一、Maven二、application Mybatis-Plus生成器（逆向工程）日期工具类

配置

一、Util 微服务网关

配置

一、依赖二、filter/AuthGlobalFilter三、config/CorsConfig 跨域四、handler/

ErrorHandlerConfigJsonExceptionHandler

SpringBoot整合Redis 配置一、依赖


    org.springframework.boot
    spring-boot-starter-data-redis




    org.apache.commons
    commons-pool2
    2.6.0

二、配置类

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.time.Duration;

@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate template = new RedisTemplate<>();
        RedisSerializer redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setConnectionFactory(factory);
        //key序列化方式
        template.setKeySerializer(redisSerializer);
        //value序列化
        template.setValueSerializer(jackson2JsonRedisSerializer);
        //value hashmap序列化
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        return template;
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisSerializer redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        //解决查询缓存转换异常的问题
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        // 配置序列化（解决乱码的问题）,过期时间600秒
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(600))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                .serializevaluesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }
}

redis配置(默认没有密码)

spring.redis.host=127.0.0.1
spring.redis.port=6379
spring.redis.database= 0
spring.redis.timeout=1800000

spring.redis.lettuce.pool.max-active=20
spring.redis.lettuce.pool.max-wait=-1
#最大阻塞等待时间(负数表示没限制)
spring.redis.lettuce.pool.max-idle=5
spring.redis.lettuce.pool.min-idle=0

SpringBoot整合JWT 工具一、依赖


    
    
        io.jsonwebtoken
        jjwt

二、Utils

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jws;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.Date;


public class JwtUtils {

    public static final long EXPIRE = 1000 * 60 * 60 * 24;
    public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO";

    public static String getJwtToken(String id, String nickname){

        String JwtToken = Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setHeaderParam("alg", "HS256")
                .setSubject("guli-user")
                .setIssuedAt(new Date())
                .setExpiration(new Date(System.currentTimeMillis() + EXPIRE))
                .claim("id", id)
                .claim("nickname", nickname)
                .signWith(SignatureAlgorithm.HS256, APP_SECRET)
                .compact();

        return JwtToken;
    }

    
    public static boolean checkToken(String jwtToken) {
        if(StringUtils.isEmpty(jwtToken)) return false;
        try {
            Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    
    public static boolean checkToken(HttpServletRequest request) {
        try {
            String jwtToken = request.getHeader("token");
            if(StringUtils.isEmpty(jwtToken)) return false;
            Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    
    public static String getMemberIdByJwtToken(HttpServletRequest request) {
        String jwtToken = request.getHeader("token");
        if(StringUtils.isEmpty(jwtToken)) return "";
        Jws claimsJws = Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        Claims claims = claimsJws.getBody();
        return (String)claims.get("id");
    }
}

微服务整合Sentinel 配置一、依赖


    com.alibaba.cloud 
    spring-cloud-starter-alibaba-sentinel

二、配置

server:
  port: 8088
spring:
  cloud: 
    sentinel:
      transport:
        dashboard: localhost:8080

阿里短信整合配置一、依赖


    
        com.alibaba
        fastjson
    
    
        com.aliyun
        aliyun-java-sdk-core

二、Util

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Random;


public class RandomUtil {

	private static final Random random = new Random();

	private static final DecimalFormat fourdf = new DecimalFormat("0000");

	private static final DecimalFormat sixdf = new DecimalFormat("000000");

	public static String getFourBitRandom() {
		return fourdf.format(random.nextInt(10000));
	}

	public static String getSixBitRandom() {
		return sixdf.format(random.nextInt(1000000));
	}

	
	public static ArrayList getRandom(List list, int n) {

		Random random = new Random();

		HashMap hashMap = new HashMap();

		// 生成随机数字并存入HashMap
		for (int i = 0; i < list.size(); i++) {

			int number = random.nextInt(100) + 1;

			hashMap.put(number, i);
		}

		// 从HashMap导入数组
		Object[] robjs = hashMap.values().toArray();

		ArrayList r = new ArrayList();

		// 遍历数组并打印数据
		for (int i = 0; i < n; i++) {
			r.add(list.get((int) robjs[i]));
			System.out.print(list.get((int) robjs[i]) + "t");
		}
		System.out.print("n");
		return r;
	}
}

HttpClient[前后端请求用] 配置一、依赖


    org.apache.httpcomponents
    httpclient



    commons-io
    commons-io



    com.google.code.gson
    gson

二、Util

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NamevaluePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.config.RequestConfig.Builder;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNamevaluePair;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;


public class HttpClientUtils {

	public static final int connTimeout=10000;
	public static final int readTimeout=10000;
	public static final String charset="UTF-8";
	private static HttpClient client = null;

	static {
		PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
		cm.setMaxTotal(128);
		cm.setDefaultMaxPerRoute(128);
		client = HttpClients.custom().setConnectionManager(cm).build();
	}

	public static String postParameters(String url, String parameterStr) throws ConnectTimeoutException, SocketTimeoutException, Exception{
		return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
	}

	public static String postParameters(String url, String parameterStr,String charset, Integer connTimeout, Integer readTimeout) throws ConnectTimeoutException, SocketTimeoutException, Exception{
		return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
	}

	public static String postParameters(String url, Map params) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
		return postForm(url, params, null, connTimeout, readTimeout);
	}

	public static String postParameters(String url, Map params, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
		return postForm(url, params, null, connTimeout, readTimeout);
	}

	public static String get(String url) throws Exception {
		return get(url, charset, null, null);
	}

	public static String get(String url, String charset) throws Exception {
		return get(url, charset, connTimeout, readTimeout);
	}

	
	public static String post(String url, String body, String mimeType,String charset, Integer connTimeout, Integer readTimeout)
			throws ConnectTimeoutException, SocketTimeoutException, Exception {
		HttpClient client = null;
		HttpPost post = new HttpPost(url);
		String result = "";
		try {
			if (StringUtils.isNotBlank(body)) {
				HttpEntity entity = new StringEntity(body, ContentType.create(mimeType, charset));
				post.setEntity(entity);
			}
			// 设置参数
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			post.setConfig(customReqConf.build());

			HttpResponse res;
			if (url.startsWith("https")) {
				// 执行 Https 请求.
				client = createSSLInsecureClient();
				res = client.execute(post);
			} else {
				// 执行 Http 请求.
				client = HttpClientUtils.client;
				res = client.execute(post);
			}
			result = IOUtils.toString(res.getEntity().getContent(), charset);
		} finally {
			post.releaseConnection();
			if (url.startsWith("https") && client != null&& client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
		return result;
	}


	
	public static String postForm(String url, Map params, Map headers, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {

		HttpClient client = null;
		HttpPost post = new HttpPost(url);
		try {
			if (params != null && !params.isEmpty()) {
				List formParams = new ArrayList();
				Set> entrySet = params.entrySet();
				for (Entry entry : entrySet) {
					formParams.add(new BasicNamevaluePair(entry.getKey(), entry.getValue()));
				}
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, Consts.UTF_8);
				post.setEntity(entity);
			}

			if (headers != null && !headers.isEmpty()) {
				for (Entry entry : headers.entrySet()) {
					post.addHeader(entry.getKey(), entry.getValue());
				}
			}
			// 设置参数
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			post.setConfig(customReqConf.build());
			HttpResponse res = null;
			if (url.startsWith("https")) {
				// 执行 Https 请求.
				client = createSSLInsecureClient();
				res = client.execute(post);
			} else {
				// 执行 Http 请求.
				client = HttpClientUtils.client;
				res = client.execute(post);
			}
			return IOUtils.toString(res.getEntity().getContent(), "UTF-8");
		} finally {
			post.releaseConnection();
			if (url.startsWith("https") && client != null
					&& client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
	}




	
	public static String get(String url, String charset, Integer connTimeout,Integer readTimeout)
			throws ConnectTimeoutException,SocketTimeoutException, Exception {

		HttpClient client = null;
		HttpGet get = new HttpGet(url);
		String result = "";
		try {
			// 设置参数
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			get.setConfig(customReqConf.build());

			HttpResponse res = null;

			if (url.startsWith("https")) {
				// 执行 Https 请求.
				client = createSSLInsecureClient();
				res = client.execute(get);
			} else {
				// 执行 Http 请求.
				client = HttpClientUtils.client;
				res = client.execute(get);
			}

			result = IOUtils.toString(res.getEntity().getContent(), charset);
		} finally {
			get.releaseConnection();
			if (url.startsWith("https") && client != null && client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
		return result;
	}


	
	@SuppressWarnings("unused")
	private static String getCharsetFromResponse(HttpResponse ressponse) {
		// Content-Type:text/html; charset=GBK
		if (ressponse.getEntity() != null  && ressponse.getEntity().getContentType() != null && ressponse.getEntity().getContentType().getValue() != null) {
			String contentType = ressponse.getEntity().getContentType().getValue();
			if (contentType.contains("charset=")) {
				return contentType.substring(contentType.indexOf("charset=") + 8);
			}
		}
		return null;
	}



	
	private static CloseableHttpClient createSSLInsecureClient() throws GeneralSecurityException {
		try {
			SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
				@Override
				public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
					return true;
				}
			}).build();

			SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {

				@Override
				public boolean verify(String arg0, SSLSession arg1) {
					return true;
				}

				@Override
				public void verify(String host, SSLSocket ssl)
						throws IOException {
				}

				@Override
				public void verify(String host, X509Certificate cert)
						throws SSLException {
				}

				@Override
				public void verify(String host, String[] cns,
								   String[] subjectAlts) throws SSLException {
				}

			});

			return HttpClients.custom().setSSLSocketFactory(sslsf).build();

		} catch (GeneralSecurityException e) {
			throw e;
		}
	}

	public static void main(String[] args) {
		try {
			String str= post("https://localhost:443/ssl/test.shtml","name=12&page=34","application/x-www-form-urlencoded", "UTF-8", 10000, 10000);
			//String str= get("https://localhost:443/ssl/test.shtml?name=12&page=34","GBK");
            
			System.out.println(str);
		} catch (ConnectTimeoutException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SocketTimeoutException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

开启Mapper扫包配置一、Maven


    
        
            src/main/java
            
                ***.xml
            
            false

二、application

#配置mapper xml文件的路径
mybatis-plus.mapper-locations=classpath:c om/atguigu/eduservice/mapper/xml
public class CodeGenerator {

    @Test
    public void run() {

        // 1、创建代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 2、全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        gc.setOutputDir("E:\beifen111\JavaProject\guli_parent\service\service_ucenter" + "/src/main/java");

        gc.setAuthor("文艺倾年");
        gc.setOpen(false); //生成后是否打开资源管理器
        gc.setFileOverride(false); //重新生成时文件是否覆盖

        gc.setServiceName("%sService");	//去掉Service接口的首字母I


        gc.setIdType(IdType.ID_WORKER_STR); //主键策略
        gc.setDateType(DateType.ONLY_DATE);//定义生成的实体类中日期类型
        gc.setSwagger2(true);//开启Swagger2模式

        mpg.setGlobalConfig(gc);

        // 3、数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://localhost:3306/guli?serverTimezone=GMT%2B8");
        dsc.setDriverName("com.mysql.cj.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("root");
        dsc.setDbType(DbType.MYSQL);
        mpg.setDataSource(dsc);

        // 4、包配置 com.atguigu.eduservice
        PackageConfig pc = new PackageConfig();
        pc.setModuleName("educenter"); //模块名
        pc.setParent("com.atguigu");
        pc.setController("controller");
        pc.setEntity("entity");
        pc.setService("service");
        pc.setMapper("mapper");
        mpg.setPackageInfo(pc);

        // 5、策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setInclude("ucenter_member");
        strategy.setNaming(NamingStrategy.underline_to_camel);//数据库表映射到实体的命名策略
        strategy.setTablePrefix(pc.getModuleName() + "_"); //生成实体时去掉表前缀

        strategy.setColumnNaming(NamingStrategy.underline_to_camel);//数据库表字段映射到实体的命名策略
        strategy.setEntityLombokModel(true); // lombok 模型 @Accessors(chain = true) setter链式操作

        strategy.setRestControllerStyle(true); //restful api风格控制器
        strategy.setControllerMappingHyphenStyle(true); //url中驼峰转连字符

        mpg.setStrategy(strategy);


        // 6、执行
        mpg.execute();
    }
}

日期工具类配置一、Util

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;


public class DateUtil {

    private static final String dateFormat = "yyyy-MM-dd";

    
    public static String formatDate(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
        return sdf.format(date);

    }

    
    public static Date addDays(Date date, int amount) {
        Calendar now =Calendar.getInstance();
        now.setTime(date);
        now.set(Calendar.DATE,now.get(Calendar.DATE)+amount);
        return now.getTime();
    }

    public static void main(String[] args) {
        System.out.println(DateUtil.formatDate(new Date()));
        System.out.println(DateUtil.formatDate(DateUtil.addDays(new Date(), -1)));
    }
}

微服务网关配置一、依赖


    
        com.atguigu
        common_utils
        0.0.1-SNAPSHOT
    

    
        org.springframework.cloud
        spring-cloud-starter-alibaba-nacos-discovery
    

    
        org.springframework.cloud
        spring-cloud-starter-gateway
    

    
    
        com.google.code.gson
        gson
    

    
    
        org.springframework.cloud
        spring-cloud-starter-openfeign

二、filter/AuthGlobalFilter

package com.atguigu.gateway.filter;

import com.google.gson.JsonObject;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.nio.charset.StandardCharsets;
import java.util.List;


@Component
public class AuthGlobalFilter implements GlobalFilter, Ordered {

    private AntPathMatcher antPathMatcher = new AntPathMatcher();

    @Override
    public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        String path = request.getURI().getPath();
        //谷粒学院api接口，校验用户必须登录
        if(antPathMatcher.match("/apiauthinner
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.UrlbasedCorsConfigurationSource;
import org.springframework.web.util.pattern.PathPatternParser;


@Configuration
public class CorsConfig {
    @Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.addAllowedMethod("*");
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");

        UrlbasedCorsConfigurationSource source = new UrlbasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("
@Configuration
@EnableConfigurationProperties({ServerProperties.class, ResourceProperties.class})
public class ErrorHandlerConfig {

    private final ServerProperties serverProperties;

    private final ApplicationContext applicationContext;

    private final ResourceProperties resourceProperties;

    private final List viewResolvers;

    private final ServerCodecConfigurer serverCodecConfigurer;

    public ErrorHandlerConfig(ServerProperties serverProperties,
                                     ResourceProperties resourceProperties,
                                     ObjectProvider> viewResolversProvider,
                                        ServerCodecConfigurer serverCodecConfigurer,
                                     ApplicationContext applicationContext) {
        this.serverProperties = serverProperties;
        this.applicationContext = applicationContext;
        this.resourceProperties = resourceProperties;
        this.viewResolvers = viewResolversProvider.getIfAvailable(Collections::emptyList);
        this.serverCodecConfigurer = serverCodecConfigurer;
    }

    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    public ErrorWebExceptionHandler errorWebExceptionHandler(ErrorAttributes errorAttributes) {
        JsonExceptionHandler exceptionHandler = new JsonExceptionHandler(
                errorAttributes,
                this.resourceProperties,
                this.serverProperties.getError(),
                this.applicationContext);
        exceptionHandler.setViewResolvers(this.viewResolvers);
        exceptionHandler.setMessageWriters(this.serverCodecConfigurer.getWriters());
        exceptionHandler.setMessageReaders(this.serverCodecConfigurer.getReaders());
        return exceptionHandler;
    }
}

JsonExceptionHandler

package com.atguigu.gateway.handler;

import org.springframework.boot.autoconfigure.web.ErrorProperties;
import org.springframework.boot.autoconfigure.web.ResourceProperties;
import org.springframework.boot.autoconfigure.web.reactive.error.DefaultErrorWebExceptionHandler;
import org.springframework.boot.web.reactive.error.ErrorAttributes;
import org.springframework.context.ApplicationContext;
import org.springframework.http.HttpStatus;
import org.springframework.web.reactive.function.server.*;

import java.util.HashMap;
import java.util.Map;


public class JsonExceptionHandler extends DefaultErrorWebExceptionHandler {

    public JsonExceptionHandler(ErrorAttributes errorAttributes, ResourceProperties resourceProperties,
                                ErrorProperties errorProperties, ApplicationContext applicationContext) {
        super(errorAttributes, resourceProperties, errorProperties, applicationContext);
    }

    
    @Override
    protected Map getErrorAttributes(ServerRequest request, boolean includeStackTrace) {
        Map map = new HashMap<>();
        map.put("success", false);
        map.put("code", 20005);
        map.put("message", "网关失败");
        map.put("data", null);
        return map;
    }

    
    @Override
    protected RouterFunction getRoutingFunction(ErrorAttributes errorAttributes) {
        return RouterFunctions.route(RequestPredicates.all(), this::renderErrorResponse);
    }

    
    @Override
    protected int getHttpStatus(Map errorAttributes) {
        return 200;
    }
}

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