Spring-Cloud学习笔记一（提供者和消费者）
一、Spring Cloud简介
Spring Cloud为开发人员提供了快速构建分布式系统中的一些通用模式（例如配置管理，服务发现，断路器，智能路由，微代理，控制总线，一次性令牌，全局锁，领导选举，分布式 会话，群集状态）。 分布式系统的协调导致了锅炉板模式，并且使用Spring Cloud开发人员可以快速地站起来实现这些模式的服务和应用程序。 它们可以在任何分布式环境中正常工作，包括开发人员自己的笔记本电脑，裸机数据中心和受管平台，如Cloud Foundry。
二、创建一个提供者
1.1、pom配置文件
1.2、创建sql文件
drop table user if exists;
create table user(
id bigint generated by default as identity,
username varchar(40),
name varchar(20),
age int(3),
balance decimal(10,2),
primary key(id)
);
1.3、添加测试语句
insert into user(id,username, name, age, balance) values(1,'user1', '张三', 20, 100.00);
insert into user(id,username, name, age, balance) values(2,'user2', '李四', 20, 100.00);
insert into user(id,username, name, age, balance) values(3,'user3', '王五', 20, 100.00);
insert into user(id,username, name, age, balance) values(4,'user4', '马六', 20, 100.00);
1.4、创建实体类user
package com.renxin.cloud.provider.entity;
import java.math.BigDecimal;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column
private Long id;
@Column
private String username;
@Column
private String name;
@Column
private Short age;
@Column
private BigDecimal balance;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Short getAge() {
return age;
}
public void setAge(Short age) {
this.age = age;
}
public BigDecimal getBalance() {
return balance;
}
public void setBalance(BigDecimal balance) {
this.balance = balance;
}
}
1.5、创建接口对象
package com.renxin.cloud.provider.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.renxin.cloud.provider.entity.User;
@Repository
public interface UserRepository extends JpaRepository
}
1.6、创建Controller(这里只是测试类直接调用接口，没有写dao层)
package com.renxin.cloud.provider.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.renxin.cloud.provider.entity.User;
import com.renxin.cloud.provider.repository.UserRepository;
@RestController
public class UserController {
@Autowired
private UserRepository userRepository;
@GetMapping("/simple/{id}")
public User findById(@PathVariable Long id) {
return this.userRepository.findOne(id);
}
}
1.7、Application
package com.renxin.cloud.provider;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
1.8、application.yml
server:
port: 7900
spring:
jpa:
generate-ddl: false
show-sql: true
hibernate:
ddl-auto: none
datasource:
platform: h2
schema: classpath:schema.sql
data: classpath:data.sql
logging:
level:
root: INFO
org.hibernate: INFO
org.hibernate.type.descriptor.sql.BasicBinder: TRACE
org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
com.itmuch: DEBUG
二、创建一个消费者
2.1、pom.xml配置
2.2、创建实体类user
package com.renxin.cloud.consum.entity;
import java.math.BigDecimal;
public class User {
private Long id;
private String username;
private String name;
private Short age;
private BigDecimal balance;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Short getAge() {
return age;
}
public void setAge(Short age) {
this.age = age;
}
public BigDecimal getBalance() {
return balance;
}
public void setBalance(BigDecimal balance) {
this.balance = balance;
}
}
2.3、创建controller
package com.renxin.cloud.consum.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import com.renxin.cloud.consum.entity.User;
@RestController
public class MovieController {
@Autowired
private RestTemplate restTemplate;
@Value("${user.userServicePath}")
private String userServicePath;
@GetMapping("/movie/{id}")
public User findById(@PathVariable Long id) {
return this.restTemplate.getForObject(this.userServicePath + id, User.class);
}
}
2.4、Application
package com.renxin.cloud.consum;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
public class Application {
@Bean
public RestTemplate restTemplate() {
return new RestTemplate();
}
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
2.5、application.yml
server:
port: 7901
user:
userServicePath: http://localhost:7900/simple/