Java项目各框架环境配置-Toy模板网

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SpringBoot

使用Spring Initializr创建工程，勾选Spring Web
导入依赖

<dependency>
	<groupId>org.projectlombok</groupId>
	<artifactId>lombok</artifactId>
	<version>1.18.20</version>
</dependency>
<dependency>
	<groupId>junit</groupId>
	<artifactId>junit</artifactId>
	<scope>test</scope>
</dependency>

application.properties配置文件改为application.yml
- 配置端口：

server: 
	port: 8080

Json序列化

Jackson

创建JacksonObjectMapper类并继承ObjectMapper

import static com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES;

/**
 * 对象映射器:基于jackson将Java对象转为json，或者将json转为Java对象
 * 将JSON解析为Java对象的过程称为 [从JSON反序列化Java对象]
 * 从Java对象生成JSON的过程称为 [序列化Java对象到JSON]
 */
public class JacksonObjectMapper extends ObjectMapper {

    public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
    public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
    public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";

    public JacksonObjectMapper() {
        super();
        //收到未知属性时不报异常
        this.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);

        //反序列化时，属性不存在的兼容处理
        this.getDeserializationConfig().withoutFeatures(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);


        SimpleModule simpleModule = new SimpleModule()
                .addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
                .addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
                .addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)))

                .addSerializer(BigInteger.class, ToStringSerializer.instance)
                .addSerializer(Long.class, ToStringSerializer.instance)
                .addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
                .addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
                .addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));

        //注册功能模块 例如，可以添加自定义序列化器和反序列化器
        this.registerModule(simpleModule);
    }
}

创建config类并继承WebMvcConfigurationSupport
在其中重写扩展消息转换器的方法，将新建的JacksonObjectMapper设为消息转换器

@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    /**
     * 扩展spring mvc的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器……");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc的转换器集合中
        converters.add(0,messageConverter);
    }
}

将json转为java对象

ObjectMapper objectMapper = new ObjectMapper();
MyObject myObject = objectMapper.readValue(jsonString, MyObject.class);

将java对象转为json

ObjectMapper objectMapper = new ObjectMapper();
String jsonString = objectMapper.writeValueAsString(myObject);

fastjson

引入依赖

 <!--fastjson依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
        </dependency>

新建config类添加配置

@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Bean//使用@Bean注入fastJsonHttpMessageConvert
    public HttpMessageConverter fastJsonHttpMessageConverters() {
        //1.需要定义一个Convert转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
 
        SerializeConfig.globalInstance.put(Long.class, ToStringSerializer.instance);
 
        fastJsonConfig.setSerializeConfig(SerializeConfig.globalInstance);
        fastConverter.setFastJsonConfig(fastJsonConfig);
        HttpMessageConverter<?> converter = fastConverter;
        return converter;
    }
 
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(fastJsonHttpMessageConverters());
    }
}

将json转为java对象

MyObject myObject = JSON.parseObject(jsonString, MyObject.class);

将java对象转为json字符串

String jsonString = JSON.toJSONString(myObject);

Mybatis-Plus

导入依赖

<dependency>
	<groupId>org.mybatis.spring.boot</groupId>
	<artifactId>mybatis-spring-boot-starter</artifactId>
	<version>2.2.2</version>
</dependency>
<dependency>
	<groupId>com.baomidou</groupId>
	<artifactId>mybatis-plus-boot-starter</artifactId>
	<version>3.1.1</version>
</dependency>

编写配置文件application.yml

#下面这些内容是为了让MyBatis映射
mybatis:
  #指定Mybatis的Mapper文件
  mapper-locations=classpath: mappers/*xml
  #指定Mybatis的实体目录
  type-aliases-package: com.rainbow.entity

mybatis-plus:
  configuration:
    #在映射实体或者属性时，将数据库中表名和字段名中的下划线去掉，按照驼峰命名法映射.
    map-underscore-to-camel-case: true
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  global-config:
    db-config:
      id type: ASSIGN_ID

配置mapper、service、serviceImpl
- mapper：创建接口继承BaseMapper；该接口用@Mapper注解
- service：创建接口继承IService
- serviceImpl：创建类实现service接口；继承ServiceImpl；用@Service注解该类

Mysql

导入依赖

<dependency>
	<groupId>mysql</groupId>
	<artifactId>mysql-connector-java</artifactId>
	<version>5.1.47</version>
</dependency>

<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>druid</artifactId>
	<version>1.2.16</version>
</dependency>

配置文件application.yml

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/DatabaseName
    username: root
    password: root
    type: com.alibaba.druid.pool.DruidDataSource

Nginx

启动nginx
编写配置文件nginx.conf

# 定义后端服务器组，Nginx在这些服务器中分配请求负载
upstream ServerGroupName{
	# 定义服务器的地址
	server localhost:51601;
}
server {
	# nginx端口
	listen 8801;
	location / {
		root D:/workspace/app-web/ ;
		index index.html;
	}
	location ~/app/(.*) {
		proxy_pass http://app-gateway/$1;								#将请求中的app及之后的部分放到$1的位置
		proxy_set_header HOST $host;									#不改变源请求头的值
		proxy_pass_request_body on; 									#开启获取请求体
		proxy_pass_request_headers on; 									#开启获取请求头
		proxy_set_header X-Real-IP $remote_addr; 						# 记录真实发出请求的客户端IP
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;	#记录代理信息
}

或是在nginx.conf中引入其他.conf文件

worker_processes 1;
events {
	worker_connections 1024;
}
http {
	include mime.types;
	default_type application/octet-stream;
	sendfile on;
	keepalive_timeout 65;
	#引入自定义配置文件
	include ConfPackage/*.conf;
}

注意：修改完配置文件后需要使用 nginx -s reload 重新加载启动nginx文章来源地址https://www.toymoban.com/news/detail-608220.html

Redis

需要在服务器上启动Redis服务
在Java中引入依赖

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!--common-pool对象池-->
<dependency>
	<groupId>org.apache.commons</groupId>
	<artifactId>commons-pool2</artifactId>
</dependency>

配置文件application.yml中配置redis

spring:
  redis:
    host: 192.168.133.128
    port: 6379
    password: root
    lettuce:
      pool:
        max-active: 8
        max-idle: 8
        min-idle: 0
        max-wait: 100ms

注入RedisTemplate

@Autowired
private RedisTemplate redisTemplate

Nacos

服务器启动Nacos
java导入依赖

父工程引入Alibaba的SpringCloud依赖

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
    <version>2.2.6.RELEASE</version>
    <type>pom</type>
    <scope>import</scope>
</dependency>

客户端引入nacos-discovery依赖

<!-- nacos客户端依赖包 -->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

在配置文件application.yml中配置nacos

spring:
  cloud:
    nacos:
    	discovery: 
    		server-addr: localhost:8848
    	config: 
    		server-addr: localhost:8848
    		file-extension: yml

Feign

引入依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

在服务消费者的启动类上添加注解@EnableFeignClients开启Feign的功能
在服务消费者的包下定义接口，加上服务提供者的接口
使用该接口实现远程调用

网关Gateway

引入依赖

<!--网关-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>

编写基本配置

server:
  port: 10010 # 网关端口
spring:
  application:
    name: gateway # 服务名称
  cloud:
    nacos:
      server-addr: localhost:8848 # nacos地址
    gateway:
    globalcors:
		cors-configurations : 
			'[/**]': 				#匹配所有请求
				allowedOrigins: "*"	#跨域处理允许所有的域
				allowedMethods: 	#支持的方法
					- GET
					- POST
					- PUT
					- DELETE

      routes: # 网关路由配置
        - id: user-service # 路由id，自定义，只要唯一即可
          # uri: http://127.0.0.1:8081 # 路由的目标地址 http就是固定地址
          uri: lb://userservice # 路由的目标地址 lb就是负载均衡，后面跟服务名称
          predicates: # 路由断言，也就是判断请求是否符合路由规则的条件
            - Path=/user/** # 这个是按照路径匹配，只要以/user/开头就符合要求
          filters: 
          	- StripPrefix = 1	# 转发请求到达目标路径时去除一级路径，例：api/user/service转发后变为user/service(但该过滤器不能随便使用，以免转发后不能正常调用服务)

RabbitMQ

服务器启动RabbitMQ
引入依赖

<!--AMQP依赖，包含RabbitMQ-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>

配置

spring:
  rabbitmq:
    host: 192.168.133.128 # 主机名
    port: 5672 # 端口
    virtual-host: / # 虚拟主机
    username: root # 用户名
    password: root # 密码

注入RabbitTemplate

@Autowired
private RabbitTemplate rabbitTemplate

服务提供者rabbitTemplate.convertAndSend
服务提供者@RabbitListener

Kafka

拉取镜像

docker pull zookeeper:3.4.14

创建容器

docker run -d --name zookeeper -p 2181:2181 zookeeper:3.4.14

导入依赖

<!-- kafkfa -->
<dependency>
	<groupId>org.springframework.kafka</groupId>
	<artifactId>spring-kafka</artifactId>
	<exclusions>
		<exclusion>
			<groupId>org.apache.kafka</groupId>
			<artifactId>kafka-clients</artifactId>
		</exclusion>
	</exclusions>
</dependency>
<dependency>
	<groupId>org.apache.kafka</groupId>
	<artifactId>kafka-clients</artifactId>
</dependency>

配置文件

server:
	port: 9991
spring:
	application:
		name: kafka-demo
	kafka:
		bootstrap-servers: 192.168.133.128:9092	#kafka地址
		producer:
			retries: 10	#重试次数
			key-serializer: org.apache.kafka.common.serialization.stringSerializer
			value-serializer: org.apache.kafka.common.serialization.stringSerializer
		consumer:
			group-id: test-hello-group	#组名称
			key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
			value-deserializer: org.apache.kafka.common.serialization.stringDeserializer

注入KafkaTemplate
生产者调用send(String topic,String message)
消费者使用注解@KafkaListener(topics = "xxx"),方法上用String message作参数接收消息

Elasticsearch

导入依赖

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
</dependency>

初始化代码

RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(
        HttpHost.create("http://192.168.133.128:9200")
));

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Java项目各框架环境配置