objectmapper redisTemplate等 组件配置

1.objectmapper 配置

package com.szsti.existingbuilding.web.config;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.text.SimpleDateFormat;


@Slf4j
@Configuration
public class ObjectMapperConfig {

    @Bean("objectMapper")
    public ObjectMapper objectMapper() {

        ObjectMapper objectMapper = new ObjectMapper();
        //configure方法 配置一些需要的参数
        // 转换为格式化的json 显示出来的格式美化
        objectMapper.enable(SerializationFeature.INDENT_OUTPUT);

        //序列化的时候序列对象的那些属性  
        //JsonInclude.Include.NON_DEFAULT 属性为默认值不序列化 
        //JsonInclude.Include.ALWAYS      所有属性
        //JsonInclude.Include.NON_EMPTY   属性为 空（“”） 或者为 NULL 都不序列化 
        //JsonInclude.Include.NON_NULL    属性为NULL 不序列化
        objectMapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);


        //反序列化时,遇到未知属性会不会报错 
        //true - 遇到没有的属性就报错 false - 没有的属性不会管，不会报错
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

        //如果是空对象的时候,不抛异常  
        objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);

        // 忽略 transient 修饰的属性
        objectMapper.configure(MapperFeature.PROPAGATE_TRANSIENT_MARKER, true);

        //修改序列化后日期格式
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));

        //处理不同的时区偏移格式
        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper.registerModule(new JavaTimeModule());
        return objectMapper;

    }

}

2. redisTemplate 配置

package com.atguigu.redis.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.io.Serializable;


@Configuration
@Slf4j
public class RedisConfig
{
    /**
     * @param lettuceConnectionFactory
     * @return
     *
     * redis序列化的工具配置类，下面这个请一定开启配置
     * 127.0.0.1:6379> keys *
     * 1) "ord:102"  序列化过
     * 2) "\xac\xed\x00\x05t\x00\aord:102"   野生，没有序列化过
     */
    @Bean
    public RedisTemplate<String,Serializable> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory)
    {
        RedisTemplate<String,Serializable> redisTemplate = new RedisTemplate<>();

        redisTemplate.setConnectionFactory(lettuceConnectionFactory);
        //设置key序列化方式string
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        //设置value的序列化方式json
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());

        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());

        redisTemplate.afterPropertiesSet();

        return redisTemplate;
    }

}

3.线程池

package com.szsti.existingbuilding.web.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.AsyncTaskExecutor;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

/**
 * 线程池配置
 *
 * @ClassName AsyncConfig
 * @Author Colin
 * @Date 2021/9/1 12:29
 * @Version 1.0
 */
@Configuration
public class AsyncConfig {

    private static final int MAX_POOL_SIZE = 50;

    private static final int CORE_POOL_SIZE = 20;

    @Bean("asyncTaskExecutor")
    public AsyncTaskExecutor asyncTaskExecutor() {
        ThreadPoolTaskExecutor asyncTaskExecutor = new ThreadPoolTaskExecutor();
        asyncTaskExecutor.setMaxPoolSize(MAX_POOL_SIZE);
        asyncTaskExecutor.setCorePoolSize(CORE_POOL_SIZE);
        asyncTaskExecutor.setThreadNamePrefix("async-task-thread-pool-");
        asyncTaskExecutor.initialize();
        return asyncTaskExecutor;
    }
}