GetMapping is a new annotation provided by Spring 4.3. It is a composite annotation, equivalent to @ requestmapping (method= RequestMethod.GET ), to simplify development. At the same time, @ PostMapping, @ PutMapping, @ DeleteMapping, @ PatchMapping, etc.

The properties format file is used as the configuration file in traditional Web development. Spring Boot and Spring Cloud support using properties or yml format files as configuration files.

yml file format is a file format written by YAML, and YAML and properties files can be converted to each other. YAML has a clearer structure than properties; it is more readable and maintainable, and its syntax is very concise.

Our case uses YAML as a configuration file, yml has strict indentation, and the key and value are separated by ":". The space after the colon cannot be less.

The service is very simple. It uses RestTemplate to call the API of user microservice to query the user information of the specified ID.

First, create a maven project

The content is basically the same as the pom file of the user's microservice:

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yuxx.cloud</groupId>
    <artifactId>microservice-simple-consumer-movie</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <!--Spring Boot-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>
    </dependencies>

    <!--introduce Spring Cloud Dependence on-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <!--add to spring-boot Of maven plug-in unit-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.2 user entity class

package com.yuxx.cloud.entity;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

import javax.persistence.*;
import java.math.BigDecimal;

public class User {
    private Long id;

    private String username;

    private String name;

    private Integer age;

    private BigDecimal balance;

    //Setter and Getter
}

3.3 startup

package com.yuxx.cloud;

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 ConsumerMovieApplication {

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

    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

3.4 Controller