标签:template 实战 localhost dev tor lock 使用 [] isp
Spring cloud并不是面向零基础开发人员,它有一定的学习曲线。
使用微服务构建的是分布式系统,微服务之间通过网络进行通信。我们使用服务提供者与服务消费者来描述为服务之间的调用关系。
名词 | 定义 |
服务提供者 | 服务的被调用方(即:为其他服务提供服务的服务) |
服务消费者 | 服务的调用方(即:依赖其他服务的服务) |
举个生活中的例子:我们去超市买东西,商品又是由厂商提供给超市的。在这一过程中,厂商就是服务的提高者,超市是服务的消费者。
我们只需要到超市消费就行,不用到厂商去了。
CREATE TABLE `user` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `username` varchar(40) DEFAULT NULL, `name` varchar(20) DEFAULT NULL, `age` int(3) DEFAULT NULL, `balance` decimal(10,2) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of user -- ---------------------------- INSERT INTO `user` VALUES (‘1‘, ‘account1‘, ‘张三‘, ‘20‘, ‘98.23‘); INSERT INTO `user` VALUES (‘2‘, ‘account2‘, ‘李四‘, ‘24‘, ‘23.12‘); INSERT INTO `user` VALUES (‘3‘, ‘account3‘, ‘王五‘, ‘32‘, ‘42.12‘);
创建一个springboot项目,ArtifactId为microservice-simple-provider-user
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 5 <groupId>com.itmuch.cloud</groupId> 6 <artifactId>microservice-simple-provider-user</artifactId> 7 <version>0.0.1-SNAPSHOT</version> 8 <packaging>jar</packaging> 9 10 <name>microservice-simple-provider-user</name> 11 <url>http://maven.apache.org</url> 12 13 <parent> 14 <groupId>org.springframework.boot</groupId> 15 <artifactId>spring-boot-starter-parent</artifactId> 16 <version>1.5.9.RELEASE</version> 17 </parent> 18 19 <properties> 20 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 21 <java.version>1.8</java.version> 22 </properties> 23 24 <dependencies> 25 <dependency> 26 <groupId>org.springframework.boot</groupId> 27 <artifactId>spring-boot-starter-web</artifactId> 28 </dependency> 29 <dependency> 30 <groupId>mysql</groupId> 31 <artifactId>mysql-connector-java</artifactId> 32 </dependency> 33 <dependency> 34 <groupId>org.springframework.boot</groupId> 35 <artifactId>spring-boot-devtools</artifactId> 36 <optional>true</optional> <!-- 这个需要为 true 热部署才有效 --> 37 </dependency> 38 <!-- jpa--> 39 <dependency> 40 <groupId>org.springframework.boot</groupId> 41 <artifactId>spring-boot-starter-data-jpa</artifactId> 42 </dependency> 43 </dependencies> 44 45 <!-- 引入spring cloud 的依赖 --> 46 <dependencyManagement> 47 <dependencies> 48 <dependency> 49 <groupId>org.springframework.cloud</groupId> 50 <artifactId>spring-cloud-dependencies</artifactId> 51 <version>Edgware.RELEASE</version> 52 <type>pom</type> 53 <scope>import</scope> 54 </dependency> 55 </dependencies> 56 </dependencyManagement> 57 58 <!-- 添加spring-boot 的maven插件 --> 59 <build> 60 <plugins> 61 <plugin> 62 <groupId>org.springframework.boot</groupId> 63 <artifactId>spring-boot-maven-plugin</artifactId> 64 </plugin> 65 </plugins> 66 </build> 67 68 </project>
1 package com.itmuch.cloud.entity; 2 3 import java.math.BigDecimal; 4 5 import javax.persistence.Entity; 6 import javax.persistence.GeneratedValue; 7 import javax.persistence.GenerationType; 8 import javax.persistence.Id; 9 10 @Entity 11 public class User { 12 @Id 13 @GeneratedValue(strategy = GenerationType.AUTO) 14 private Long id; 15 private String username; 16 private String name; 17 private Integer age; 18 private BigDecimal balance; 19 20 public Long getId() { 21 return id; 22 } 23 24 public void setId(Long id) { 25 this.id = id; 26 } 27 28 public String getUsername() { 29 return username; 30 } 31 32 public void setUsername(String username) { 33 this.username = username; 34 } 35 36 public String getName() { 37 return name; 38 } 39 40 public void setName(String name) { 41 this.name = name; 42 } 43 44 public Integer getAge() { 45 return age; 46 } 47 48 public void setAge(Integer age) { 49 this.age = age; 50 } 51 52 public BigDecimal getBalance() { 53 return balance; 54 } 55 56 public void setBalance(BigDecimal balance) { 57 this.balance = balance; 58 } 59 60 }
package com.itmuch.cloud.dao; import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.stereotype.Repository; import com.itmuch.cloud.entity.User; @Repository public interface UserRepository extends JpaRepository<User, Long> { }
创建Controller
package com.itmuch.cloud.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import com.itmuch.cloud.dao.UserRepository; import com.itmuch.cloud.entity.User; @RestController public class UserController { @Autowired private UserRepository userRepository; @GetMapping("/{id}") public User findById(@PathVariable Long id) { User findOne = userRepository.findOne(id); return findOne; } }
最后还有一个启动类不用说了吧。
server: port: 8084 spring: application: name: microservice-provider-user jpa: generate-ddl: false show-sql: true database-platform: org.hibernate.dialect.MySQL5Dialect hibernate: ddl-auto: none datasource: url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=UTF-8 username: root password: 1234 driver-class-name: com.mysql.jdbc.Driver http: multipart: maxFileSize: 100Mb maxRequestSize: 100Mb logging: level: root: INFO org.hibernate: INFO org.hibernate.type.descriptor.sql.BasicBinder: TRACE org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
启动访问localhost:8084/1. 试下结果。
{"id":1,"username":"account1","name":"张三","age":20,"balance":98.23}
哦了。
创建一个maven项目,ArtifactId是microservice-simple-consumer-movie.
一样一样的。
1 package com.itmuch.cloud.pojo; 2 3 import java.math.BigDecimal; 4 5 public class User { 6 private Long id; 7 private String username; 8 private String name; 9 private Integer age; 10 private BigDecimal balance; 11 12 public Long getId() { 13 return id; 14 } 15 16 public void setId(Long id) { 17 this.id = id; 18 } 19 20 public String getUsername() { 21 return username; 22 } 23 24 public void setUsername(String username) { 25 this.username = username; 26 } 27 28 public String getName() { 29 return name; 30 } 31 32 public void setName(String name) { 33 this.name = name; 34 } 35 36 public Integer getAge() { 37 return age; 38 } 39 40 public void setAge(Integer age) { 41 this.age = age; 42 } 43 44 public BigDecimal getBalance() { 45 return balance; 46 } 47 48 public void setBalance(BigDecimal balance) { 49 this.balance = balance; 50 } 51 52 }
1 package com.itmuch.cloud.controller; 2 3 import org.springframework.beans.factory.annotation.Autowired; 4 import org.springframework.web.bind.annotation.GetMapping; 5 import org.springframework.web.bind.annotation.PathVariable; 6 import org.springframework.web.bind.annotation.RestController; 7 import org.springframework.web.client.RestTemplate; 8 9 import com.itmuch.cloud.pojo.User; 10 11 @RestController 12 public class MovieController { 13 @Autowired 14 private RestTemplate restTemplate; 15 16 @GetMapping("/user/{id}") 17 public User findById(@PathVariable Long id) { 18 return restTemplate.getForObject("http://localhost:8084/" + id, User.class); 19 } 20 }
1 package com.itmuch.cloud; 2 3 import org.springframework.boot.SpringApplication; 4 import org.springframework.boot.autoconfigure.SpringBootApplication; 5 import org.springframework.context.annotation.Bean; 6 import org.springframework.web.client.RestTemplate; 7 8 @SpringBootApplication 9 public class ConsumerMovieApplication { 10 @Bean 11 public RestTemplate restTemplate() { 12 return new RestTemplate(); 13 } 14 15 public static void main(String[] args) { 16 SpringApplication.run(ConsumerMovieApplication.class, args); 17 } 18 }
server:
port: 8082
好了,你把两个服务都启动,访问http://127.0.0.1:8082/user/1, 看结果。
{"id":1,"username":"account1","name":"张三","age":20,"balance":98.23}
OK了。
标签:template 实战 localhost dev tor lock 使用 [] isp
原文地址:https://www.cnblogs.com/fengyuduke/p/10552885.html