springboot 2.6.13 快速启动系列（持续更新）

1.redis

pom

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

application.yml

spring:
  redis:
    host: localhost
    password: 123456
    port: 6379
    timeout: 5000
    database: 1

配置类

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
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.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;

/**
 * @author  {@literal puzhiweipuzhiwei@foxmail.com}
 * 继承 CachingConfigurerSupport，为了自定义生成 KEY 的策略。可以不继承。
 */
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {

    private int timeToLive = 3*60*60*1000;

    /**
     * 配置Jackson2JsonRedisSerializer序列化策略
     * */
    private Jackson2JsonRedisSerializer<Object> serializer() {
        // 使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();

        // 指定要序列化的域，field,get和set,以及修饰符范围，ANY是都有包括private和public
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);

        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

        // 指定序列化输入的类型，类必须是非final修饰的，final修饰的类，比如String,Integer等会跑出异常
        objectMapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL);

        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        return jackson2JsonRedisSerializer;
    }


    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值
        redisTemplate.setValueSerializer(serializer());

        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        // 使用StringRedisSerializer来序列化和反序列化redis的key值
        redisTemplate.setKeySerializer(stringRedisSerializer);

        // hash的key也采用String的序列化方式
        redisTemplate.setHashKeySerializer(stringRedisSerializer);
        // hash的value序列化方式采用jackson
        redisTemplate.setHashValueSerializer(serializer());
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }




    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        // 配置序列化（解决乱码的问题）
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                // 缓存有效期
                .entryTtl(Duration.ofDays(timeToLive))
                // 使用StringRedisSerializer来序列化和反序列化redis的key值
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                // 使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(serializer()))
                // 禁用空值
                .disableCachingNullValues();

        return RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
    }
}

简单示例

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

        
    @Test
    void testTwo() throws IOException {

        User user = new User("1","2");
        //  手动序列化
        redisTemplate.opsForValue().set(user.getId(), user);
        User user1 = (User) redisTemplate.opsForValue().get(user.getId());

        System.out.println(user1.toString());

    }

2.mysql ---- mybatis-plus

pom

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--        java-mysql -->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.3.1</version>
        </dependency>

application.yml

spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/DatabaseName?useUnicode=true&characterEncoding=utf8
    driverClassName: com.mysql.cj.jdbc.Driver

easycode模板

controller

##导入宏定义
$!{define.vm}

##设置表后缀（宏定义）
#setTableSuffix("Controller")

##保存文件（宏定义）
#save("/controller", "Controller.java")

##包路径（宏定义）
#setPackageSuffix("controller")

##定义服务名
#set($serviceName = $!tool.append($!tool.firstLowerCase($!tableInfo.name), "Service"))

##定义实体对象名
#set($entityName = $!tool.firstLowerCase($!tableInfo.name))

import $!{tableInfo.savePackageName}.service.$!{tableInfo.name}Service;
import org.springframework.web.bind.annotation.*;
import org.springframework.beans.factory.annotation.Autowired;

##表注释（宏定义）
#tableComment("表控制层")
@RestController
@RequestMapping("$!tool.firstLowerCase($!tableInfo.name)")
public class $!{tableName}{
    @Autowired
    private $!{tableInfo.name}Service $!{serviceName};
}

dao

##导入宏定义
$!{define.vm}

##设置表后缀（宏定义）
#setTableSuffix("Mapper")

##保存文件（宏定义）
#save("/mapper", "Mapper.java")

##包路径（宏定义）
#setPackageSuffix("mapper")

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import $!{tableInfo.savePackageName}.entity.$!tableInfo.name;
import org.apache.ibatis.annotations.Mapper;
##表注释（宏定义）

#tableComment("表数据库访问层")
@Mapper
public interface $!{tableName} extends BaseMapper<$!tableInfo.name> {

}

entity

##导入宏定义
$!{define.vm}

##保存文件（宏定义）
#save("/entity", ".java")

##包路径（宏定义）
#setPackageSuffix("entity")

##自动导入包（全局变量）
$!{autoImport.vm}

import java.io.Serializable;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
##表注释（宏定义）
#tableComment("表实体类")
@Data
@AllArgsConstructor
@NoArgsConstructor
@SuppressWarnings("serial")
public class $!{tableInfo.name} {
#foreach($column in $tableInfo.fullColumn)
    #if(${column.comment})//${column.comment}#end

    private $!{tool.getClsNameByFullName($column.type)} $!{column.name};
#end



}

service

##导入宏定义
$!{define.vm}

##设置表后缀（宏定义）
#setTableSuffix("Service")

##保存文件（宏定义）
#save("/service", "Service.java")

##包路径（宏定义）
#setPackageSuffix("service")

import com.baomidou.mybatisplus.extension.service.IService;
import $!{tableInfo.savePackageName}.entity.$!tableInfo.name;

##表注释（宏定义）
#tableComment("表服务接口")
public interface $!{tableName} extends IService<$!tableInfo.name> {

}

serviceImpl

##导入宏定义
$!{define.vm}

##设置表后缀（宏定义）
#setTableSuffix("ServiceImpl")

##保存文件（宏定义）
#save("/service/impl", "ServiceImpl.java")

##包路径（宏定义）
#setPackageSuffix("service.impl")

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import $!{tableInfo.savePackageName}.mapper.$!{tableInfo.name}Mapper;
import $!{tableInfo.savePackageName}.entity.$!{tableInfo.name};
import $!{tableInfo.savePackageName}.service.$!{tableInfo.name}Service;
import org.springframework.stereotype.Service;

##表注释（宏定义）
#tableComment("表服务实现类")
@Service("$!tool.firstLowerCase($tableInfo.name)Service")
public class $!{tableName} extends ServiceImpl<$!{tableInfo.name}Mapper, $!{tableInfo.name}> implements $!{tableInfo.name}Service {

}