pom.xml:
<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> <groupId>com.tuling.springcloud</groupId> <artifactId>03-microservice-order</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>03-microservice-order</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.10.RELEASE</version> </parent> <dependencies> <!-- Spring WEB --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- Test --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- 集成Mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
OrderController:
package com.tuling.springcloud.api; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; @RestController @RequestMapping("/order") public class OrderController { private final Logger logger = LoggerFactory.getLogger(OrderController.class); @Autowired private RestTemplate restTemplate; @Value("${user.getUserByIdUrl}") private String userByIdUrl; @RequestMapping("/user/getById") public Object getUserById(String userId) { String url = userByIdUrl + "?id=" + userId; logger.debug("param userId : {}, request url : {}", userId, url); Object result = restTemplate.getForEntity(url, Object.class); return result; } }
CommonConfig.java:
package com.jiagoushi.springcloud.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.client.RestTemplate; @Configuration public class CommonConfig { @Bean public RestTemplate restTemplate(){ return new RestTemplate(); } }
application.properties
server.port=8082 ## db config spring.datasource.url=jdbc:mysql://localhost:3306/springcloud spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.jdbc.Driver ## log logging.level.root=INFO logging.level.org.springframework.web=DEBUG logging.level.com.tuling.springcloud=DEBUG user.getUserByIdUrl=http://localhost:8083/user/getById
订单application.properties: user.getUserByIdUrl=http://localhost:8083/user/getById 是用户微服务地址
用户微服务结构:
<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> <groupId>com.tuling.springcloud</groupId> <artifactId>03-microservice-user</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>03-microservice-user</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.10.RELEASE</version> </parent> <dependencies> <!-- Spring WEB --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- Test --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- 集成Mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
UserController.java
package com.tuling.springcloud.api; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import com.tuling.springcloud.bean.User; import com.tuling.springcloud.service.UserService; @RestController @RequestMapping("/user") public class UserController { private final Logger logger = LoggerFactory.getLogger(UserController.class); @Autowired private UserService userService; @RequestMapping("/getById") public User getUserById(String id) { logger.debug("param id : {}", id); return this.userService.findById(Integer.parseInt(id)); } }
UserService.java:
package com.tuling.springcloud.service; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.tuling.springcloud.bean.User; import com.tuling.springcloud.mapper.UserMapper; @Service public class UserService { private final Logger logger = LoggerFactory.getLogger(UserService.class); @Autowired private UserMapper userMapper; public User findById(Integer id){ logger.debug("param id : {}" , id); User u = this.userMapper.findById(id); logger.debug("result name : {}" , u.getName()); return u; } }
UserMapper
package com.tuling.springcloud.service; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.tuling.springcloud.bean.User; import com.tuling.springcloud.mapper.UserMapper; @Service public class UserService { private final Logger logger = LoggerFactory.getLogger(UserService.class); @Autowired private UserMapper userMapper; public User findById(Integer id){ logger.debug("param id : {}" , id); User u = this.userMapper.findById(id); logger.debug("result name : {}" , u.getName()); return u; } }
User
package com.tuling.springcloud.bean; public class User { private Integer id; private String name; private Integer age; private String address; private String phone; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } }
application.properties
server.port=8083 ## db config spring.datasource.url=jdbc:mysql://localhost:3306/springcloud spring.datasource.username=root spring.datasource.password=123456 spring.datasource.driver-class-name=com.mysql.jdbc.Driver ## log logging.level.root=INFO logging.level.org.springframework.web=DEBUG logging.level.com.tuling.springcloud=DEBUG
order 微服务 通过spring提供的 RestTemplate这个类来调用微服务。
2个微服务都启动之后,客户端直接访问订单微服务,就可以得到结果。因为订单微服务通过rest调用了用户微服务去查数据库了
总结:
1,这次是一个简单的微服务相互之间调用,每个微服务之间都可以有自己独立的数据库,也可没有。
2,这种微服务之间相互依赖,耦合度强,如何集群的话就不知道调哪个微服务,所以需要eureka来做注册中心
欢迎来QQ群:592495675 一起研究 java技术,群里技术大佬,还有所有springCloud 学习源代码
原文:https://www.cnblogs.com/smallFishs/p/10555629.html