使用 Springboot 编写 client-service。
创建空项目
使用 initializer https://start.spring.io/
application properties
server.port=8087
spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.jpa.defer-datasource-initialization=true
spring.h2.console.enabled=true
spring.h2.console.path=/h2-console
spring.h2.console.settings.trace=false
spring.h2.console.settings.web-allow-others=false
Client Entity
@Entity
@Data
public class Client {
@Id
private Long id;
private String name;
private Long assetValue;
}
data.sql
Insert into Client(id, name, asset_value) values
(1, 'Peter Fisher', 5000),
(2, 'Jorge Sullivan', 8000),
(3, 'Eric Woods', 6000),
(4, 'Norma Fisher', 12000),
(5, 'Kayla Sullivan', 800),
(6, 'Elizabeth Woods', 10000);
endpoint
@GetMapping("/getClient/{id}")
public Client getClient(@PathVariable Long id) {
return clientService.getClient(id);
}
Maven build jar
D:\SDisk\workspace\Java\client-service>mvn clean package -Dmaven.test.skip=true
[INFO] Scanning for projects...
[INFO]
[INFO] ---------------------< com.example:client-service >---------------------
[INFO] Building client-service 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:3.2.0:clean (default-clean) @ client-service ---
[INFO] Deleting D:\SDisk\workspace\Java\client-service\target
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:resources (default-resources) @ client-service ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Using 'UTF-8' encoding to copy filtered properties files.
[INFO] Copying 1 resource
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.10.1:compile (default-compile) @ client-service ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 6 source files to D:\SDisk\workspace\Java\client-service\target\classes
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:testResources (default-testResources) @ client-service ---
[INFO] Not copying test resources
[INFO]
[INFO] --- maven-compiler-plugin:3.10.1:testCompile (default-testCompile) @ client-service ---
[INFO] Not compiling test sources
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ client-service ---
[INFO] Tests are skipped.
[INFO]
[INFO] --- maven-jar-plugin:3.2.2:jar (default-jar) @ client-service ---
[INFO] Building jar: D:\SDisk\workspace\Java\client-service\target\client-service-0.0.1-SNAPSHOT.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.7.8:repackage (repackage) @ client-service ---
[INFO] Replacing main artifact with repackaged archive
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.644 s
[INFO] Finished at: 2023-03-05T22:09:30+08:00
[INFO] ------------------------------------------------------------------------
Start service (about 3 seconds)
D:\SDisk\workspace\Java\client-service>java -jar target\client-service-0.0.1-SNAPSHOT.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.7.8)
2023-03-05 22:10:53.599 INFO 17816 --- [ main] c.e.c.ClientServiceApplication : Starting ClientServiceApplication v0.0.1-SNAPSHOT using Java 17.0.6 on DESKTOP-VG9BSQR with PID 17816 (D:\SDisk\workspace\Java\client-service\target\client-service-0.0.1-SNAPSHOT.jar started by syq in D:\SDisk\workspace\Java\client-service)
2023-03-05 22:10:53.601 INFO 17816 --- [ main] c.e.c.ClientServiceApplication : No active profile set, falling back to 1 default profile: "default"
2023-03-05 22:10:54.124 INFO 17816 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-03-05 22:10:54.175 INFO 17816 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 41 ms. Found 1 JPA repository interfaces.
2023-03-05 22:10:54.696 INFO 17816 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8087 (http)
2023-03-05 22:10:54.706 INFO 17816 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2023-03-05 22:10:54.706 INFO 17816 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.71]
2023-03-05 22:10:54.771 INFO 17816 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2023-03-05 22:10:54.772 INFO 17816 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1126 ms
2023-03-05 22:10:54.799 INFO 17816 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2023-03-05 22:10:54.988 INFO 17816 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2023-03-05 22:10:54.998 INFO 17816 --- [ main] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:testdb'
2023-03-05 22:10:55.122 INFO 17816 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2023-03-05 22:10:55.170 INFO 17816 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.14.Final
2023-03-05 22:10:55.323 INFO 17816 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2023-03-05 22:10:55.421 INFO 17816 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2023-03-05 22:10:55.869 INFO 17816 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2023-03-05 22:10:55.876 INFO 17816 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2023-03-05 22:10:56.109 WARN 17816 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2023-03-05 22:10:56.370 INFO 17816 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8087 (http) with context path ''
2023-03-05 22:10:56.377 INFO 17816 --- [ main] c.e.c.ClientServiceApplication : Started ClientServiceApplication in 3.134 seconds (JVM running for 3.494)