【SpringCloud】Eureka 案例上手稍微带点原理(1)

2023-07-04 153

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简介： 1. 前置工作先准备两个能独立跑起来的微服务（user-server 和 order-server）将所需 SQL 导入

1. 前置工作

先准备两个能独立跑起来的微服务（user-server 和 order-server）

将所需 SQL 导入

/*
 Navicat Premium Data Transfer
 Source Server         : CentOS7
 Source Server Type    : MySQL
 Source Schema         : cloud
 Target Server Type    : MySQL
 Date: 28/05/2023 10:19:17
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for tb_order
-- ----------------------------
DROP TABLE IF EXISTS `tb_order`;
CREATE TABLE `tb_order`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '订单id',
  `user_id` bigint(20) NOT NULL COMMENT '用户id',
  `name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '商品名称',
  `price` bigint(20) NOT NULL COMMENT '商品价格',
  `num` int(10) DEFAULT 0 COMMENT '商品数量',
  PRIMARY KEY (`id`) USING BTREE,
  UNIQUE INDEX `username`(`name`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 109 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of tb_order
-- ----------------------------
INSERT INTO `tb_order` VALUES (101, 1, 'Apple 苹果 iPhone 12 ', 699900, 1);
INSERT INTO `tb_order` VALUES (102, 2, '雅迪 yadea 新国标电动车', 209900, 1);
INSERT INTO `tb_order` VALUES (103, 3, '骆驼（CAMEL）休闲运动鞋女', 43900, 1);
INSERT INTO `tb_order` VALUES (104, 4, '小米10 双模5G 骁龙865', 359900, 1);
INSERT INTO `tb_order` VALUES (105, 5, 'OPPO Reno3 Pro 双模5G 视频双防抖', 299900, 1);
INSERT INTO `tb_order` VALUES (106, 6, '美的（Midea) 新能效 冷静星II ', 544900, 1);
INSERT INTO `tb_order` VALUES (107, 2, '西昊/SIHOO 人体工学电脑椅子', 79900, 1);
INSERT INTO `tb_order` VALUES (108, 3, '梵班（FAMDBANN）休闲男鞋', 31900, 1);
-- ----------------------------
-- Table structure for tb_user
-- ----------------------------
DROP TABLE IF EXISTS `tb_user`;
CREATE TABLE `tb_user`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `username` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '收件人',
  `address` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '地址',
  PRIMARY KEY (`id`) USING BTREE,
  UNIQUE INDEX `username`(`username`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 109 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of tb_user
-- ----------------------------
INSERT INTO `tb_user` VALUES (1, '宋祖儿', '北京市朝阳区');
INSERT INTO `tb_user` VALUES (2, '景甜', '陕西省西安市');
INSERT INTO `tb_user` VALUES (3, '李现', '湖北省十堰市');
INSERT INTO `tb_user` VALUES (4, '郭德纲', '天津市');
INSERT INTO `tb_user` VALUES (5, '王思聪', '辽宁省沈阳市');
INSERT INTO `tb_user` VALUES (6, '刘亦菲', '湖北省武汉市');
SET FOREIGN_KEY_CHECKS = 1;

1.1 搭建 user-server

1.1.1 pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.9.RELEASE</version>
        <relativePath/>
    </parent>
    <groupId>com.snow</groupId>
    <artifactId>cloud_user</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <servlet.version>3.1.0</servlet.version>
        <druid.version>1.1.20</druid.version>
        <mybatisplus.version>3.4.1</mybatisplus.version>
        <mysql.version>5.1.6</mysql.version>
        <commons.lang.version>3.7</commons.lang.version>
        <commons.codec.version>1.10</commons.codec.version>
        <fastjson.version>1.2.45</fastjson.version>
        <lombok.version>1.18.4</lombok.version>
        <!-- SpringCloud版本号 -->
        <spring-cloud.version>Hoxton.SR10</spring-cloud.version>
    </properties>
    <!-- 版本锁定: 并不是jar包导入 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <!-- 打包方式为pom: 说明我们导入的是一个父工程 -->
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- mysql驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!-- druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>
        <!-- mybatis-plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatisplus.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>com.baomidou</groupId>
                    <artifactId>mybatis-plus-generator</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>
        <!-- 阿里JSON解析器 -->
        <dependency>
            <groupId>com.alibaba.fastjson2</groupId>
            <artifactId>fastjson2</artifactId>
            <version>2.0.16</version>
        </dependency>
    </dependencies>
</project>

1.1.2 po，mapper，controller

@Data
@TableName("tb_user")
public class User {
    @TableId(type = IdType.AUTO)
    private Long id;
    private String username;
    private String address;
}

@Mapper
public interface UserMapper extends BaseMapper<User> {
}

@RestController
@RequestMapping("/user")
public class UserController {
    @Resource
    private UserMapper userMapper;
    @GetMapping("/get/{id}")
    public User get(@PathVariable("id") Long id){
        return userMapper.selectById(id);
    }
}

1.1.3 yml

server:
  port: 8081
spring:
  datasource:
    url: jdbc:mysql://192.168.0.108:3306/cloud?useSSL=false
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver

1.1.4 启动类

@SpringBootApplication
public class UserServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(UserServerApplication.class, args);
    }
}

1.1.5 启动并访问

效果如下：

1.2 搭建 order-server

1.2.1 pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.9.RELEASE</version>
        <relativePath/>
    </parent>
    <groupId>com.snow</groupId>
    <artifactId>cloud_order</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <servlet.version>3.1.0</servlet.version>
        <druid.version>1.1.20</druid.version>
        <mybatisplus.version>3.4.1</mybatisplus.version>
        <mysql.version>5.1.6</mysql.version>
        <commons.lang.version>3.7</commons.lang.version>
        <commons.codec.version>1.10</commons.codec.version>
        <fastjson.version>1.2.45</fastjson.version>
        <lombok.version>1.18.4</lombok.version>
        <!-- SpringCloud版本号 -->
        <spring-cloud.version>Hoxton.SR10</spring-cloud.version>
    </properties>
    <!-- 版本锁定: 并不是jar包导入 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <!-- 打包方式为pom: 说明我们导入的是一个父工程 -->
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- mysql驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!-- druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>
        <!-- mybatis-plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatisplus.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>com.baomidou</groupId>
                    <artifactId>mybatis-plus-generator</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>
        <!-- 阿里JSON解析器 -->
        <dependency>
            <groupId>com.alibaba.fastjson2</groupId>
            <artifactId>fastjson2</artifactId>
            <version>2.0.16</version>
        </dependency>
    </dependencies>
</project>

1.2.2 po mapper controller

@Data
@TableName("tb_order")
public class Order {
    @TableId(type = IdType.AUTO)
    private Long id;
    private Long price;
    private String name;
    private Integer num;
    private Long userId;
    @TableField(exist = false)
    private User user;
}

@Data
public class User {
    private Long id;
    private String username;
    private String address;
}

@Mapper
public interface OrderMapper extends BaseMapper<Order> {
}

@RestController
@RequestMapping("/order")
public class OrderController {
    @Resource
    private OrderMapper orderMapper;
    @GetMapping("/get/{id}")
    public Order get(@PathVariable("id") Long id){
        Order order = orderMapper.selectById(id);
        return order;
    }
}

1.2.3 yml

server:
  port: 9091
spring:
  datasource:
    url: jdbc:mysql://192.168.0.108:3306/cloud?useSSL=false
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver

1.2.4 启动类

@SpringBootApplication
public class OrderServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(OrderServerApplication.class, args);
    }
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

1.2.5 启动并访问

效果如下：

至此两个独立的微服务就顺利的跑起来了。

1.3 两个服务通信

上面的两个独立服务已经跑起来了，因为上来看呢，可以看到我们的 order服务是需要调用 user 服务的。如下图

可以看到我们的 order信息里的 user 是为null，因为我们还没有去调用 user 服务。

下来我们在 order服务里调用 user 服务。

改造 order 服务的 OrderController：

@RestController
@RequestMapping("/order")
public class OrderController {
    @Resource
    private OrderMapper orderMapper;
    @Resource
    private RestTemplate restTemplate;
    @GetMapping("/get/{id}")
    public Order get(@PathVariable("id") Long id){
        String url = "http://localhost:8081/user/get/";
        Order order = orderMapper.selectById(id);
        User user = restTemplate.getForObject(url + order.getUserId(), User.class);
        order.setUser(user);
        return order;
    }
}

启动，访问

可以看到 order 里有 user 的数据了！OK!

【SpringCloud】Eureka 案例上手稍微带点原理(1)

1. 前置工作

1.1 搭建 user-server

1.1.1 pom

1.1.2 po，mapper，controller

1.1.3 yml

1.1.4 启动类

1.1.5 启动并访问

1.2 搭建 order-server

1.2.1 pom

1.2.2 po mapper controller

1.2.3 yml

1.2.4 启动类

1.2.5 启动并访问

1.3 两个服务通信

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【SpringCloud】Eureka 案例上手稍微带点原理(1)

1. 前置工作

1.1 搭建 user-server

1.1.1 pom

1.1.2 po，mapper，controller

1.1.3 yml

1.1.4 启动类

1.1.5 启动并访问

1.2 搭建 order-server

1.2.1 pom

1.2.2 po mapper controller

1.2.3 yml

1.2.4 启动类

1.2.5 启动并访问

1.3 两个服务通信

热门文章

最新文章

相关课程

相关电子书