springboot升级到2.x需要改动的地方

由于需要跟进技术发展的脚步，对原有项目springboot进行2.0升级，但升级并不是说改一下版本就完事了，springboot2.0变动比较多，详细变化可以百度一下，下面针对升级springboot遇到的问题记录一下，希望能对升级的同学有用：

1.Redis

添加pom配置：

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

配置类：

package com.ts.config;

import java.time.Duration;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
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.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisPassword;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
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 com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;

import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

@Configuration
@EnableCaching
public class RedisCacheConfig extends CachingConfigurerSupport {
    Logger logger = LoggerFactory.getLogger(RedisCacheConfig.class);

    @Value("${spring.redis.database}")
    private int database;
    
    @Value("${spring.redis.host}")
    private String host;

    @Value("${spring.redis.port}")
    private int port;

    @Value("${spring.redis.timeout}")
    private int timeout;

    @Value("${spring.redis.pool.max-active}")
    private int maxActive;
    
    @Value("${spring.redis.pool.max-idle}")
    private int maxIdle;
    
    @Value("${spring.redis.pool.min-idle}")
    private int minIdle;

    @Value("${spring.redis.pool.max-wait}")
    private long maxWaitMillis;

    @Value("${spring.redis.password}")
    private String password;

    @Bean
    public RedisConnectionFactory jedisConnectionFactory() {
        RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration(host, port);
        redisStandaloneConfiguration.setDatabase(database);
        redisStandaloneConfiguration.setHostName(host);
        redisStandaloneConfiguration.setPassword(RedisPassword.of(password));
        
        JedisConnectionFactory jedisConnectionFactory = new JedisConnectionFactory(redisStandaloneConfiguration);
        //其他配置，可再次扩展
        return jedisConnectionFactory;
    }

    @Bean
    public JedisPool redisPoolFactory() {
        logger.info("JedisPool注入成功！！");
        logger.info("redis地址：{}:{}", host, port);
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        jedisPoolConfig.setMaxIdle(maxIdle);
        jedisPoolConfig.setMaxWaitMillis(maxWaitMillis);

        JedisPool jedisPool = new JedisPool(jedisPoolConfig, host, port, timeout, password);

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

    
    
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        return new RedisCacheManager(
            RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory),
            this.getRedisCacheConfigurationWithTtl(600), // 默认策略，未配置的 key 会使用这个
            this.getRedisCacheConfigurationMap() // 指定 key 策略
        );
    }

    private Map<String, RedisCacheConfiguration> getRedisCacheConfigurationMap() {
        Map<String, RedisCacheConfiguration> redisCacheConfigurationMap = new HashMap<>();
        redisCacheConfigurationMap.put("MerchantProductAccess", this.getRedisCacheConfigurationWithTtl(30));
        redisCacheConfigurationMap.put("UserInfoListAnother", this.getRedisCacheConfigurationWithTtl(180));

        return redisCacheConfigurationMap;
    }

    private RedisCacheConfiguration getRedisCacheConfigurationWithTtl(Integer seconds) {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
        redisCacheConfiguration = redisCacheConfiguration.serializeValuesWith(
            RedisSerializationContext
                .SerializationPair
                .fromSerializer(jackson2JsonRedisSerializer)
        ).entryTtl(Duration.ofSeconds(seconds));

        return redisCacheConfiguration;
    }

}

2.WebMvcConfiguarationSupport

代码：

package com.ts.config;

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

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import com.ts.common.interceptor.AuthorizeInterceptor;

/**
 * 设置拦截器和静态资源访问路径
 * 
 * CustomWebMvcConfigurerAdapter<BR>
 * 创建人:wbd <BR>
 * 时间：2017年12月27日-下午6:45:42 <BR>
 * @version 2.0
 *
 */
@Configuration   //标注此文件为一个配置项，spring boot才会扫描到该配置。该注解类似于之前使用xml进行配置
public class CustomWebMvcConfigurerAdapter extends WebMvcConfigurationSupport {
    @Autowired
    private Environment env;
    
    @Bean
    public HttpMessageConverter<String> responseBodyConverter(){
        StringHttpMessageConverter converter = new StringHttpMessageConverter(Charset.forName("UTF-8"));
        return converter;
    }
    
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);
    
        converters.add(responseBodyConverter());
    }
    
    /**
     * 设置拦截器
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new AuthorizeInterceptor()).addPathPatterns("/**");  //对来自/user/** 这个链接来的请求进行拦截
    }
    
    /**
     * 设置静态资源及其系统路径
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("file:" + env.getProperty("upload.filePath"));
        super.addResourceHandlers(registry);
    }
    
    /**
     * 跨域设置 /**代表所有路径
     */
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**");
    }
}

3.需要添加fasterxml  jar包

        <dependency>
            <groupId>com.fasterxml</groupId>
            <artifactId>classmate</artifactId>
            <version>1.4.0</version>
        </dependency>