1：POM
<?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>
<parent>
<groupId>org.springframework.boot
</groupId>
<artifactId>spring-boot-starter-parent
</artifactId>
<version>2.2.10.RELEASE
</version>
<relativePath/>
</parent>
<groupId>dongshi.daddy
</groupId>
<artifactId>springboot-jpa-demo
</artifactId>
<version>0.0.1-SNAPSHOT
</version>
<name>springboot-jpa-demo
</name>
<description>Demo project for Spring Boot
</description>
<properties>
<java.version>1.8
</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot
</groupId>
<artifactId>spring-boot-starter-data-jpa
</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot
</groupId>
<artifactId>spring-boot-starter-web
</artifactId>
</dependency>
<dependency>
<groupId>mysql
</groupId>
<artifactId>mysql-connector-java
</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot
</groupId>
<artifactId>spring-boot-starter-test
</artifactId>
<scope>test
</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage
</groupId>
<artifactId>junit-vintage-engine
</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit
</groupId>
<artifactId>junit
</artifactId>
<version>4.12
</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot
</groupId>
<artifactId>spring-boot-maven-plugin
</artifactId>
</plugin>
</plugins>
</build>
</project>
2：dao
public interface UserDao extends JpaRepository<User, Long> {
User
findByUsername(String username
);
}
3：service
@Service
public class UserService {
@Autowired
private UserDao userRepository
;
public User
findUserByName(String usernarne
) {
return userRepository
.findByUsername(usernarne
);
}
}
4：controller
@RequestMapping("/user")
@RestController
public class UserController {
@Autowired
UserService userService
;
@GetMapping("/{username}")
@ResponseBody
public User
getUser(@PathVariable("username") String username
) {
System
.out
.println("username is: " + username
);
return userService
.findUserByName(username
);
}
}
5：表和测试数据
CREATE TABLE `user` (
`id
` bigint(20) NOT NULL AUTO_INCREMENT,
`password
` varchar(255) DEFAULT NULL,
`username
` varchar(255) NOT NULL,
PRIMARY KEY (`id
`),
UNIQUE KEY `UK_sb8bbouer5wak8vyiiy4pf2bx
` (`username
`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
;
insert into user(password
, username
) values("111", "dongshidaddy");
6：测试类
@RunWith(SpringRunner
.class)
@SpringBootTest(webEnvironment
= SpringBootTest
.WebEnvironment
.DEFINED_PORT
)
public class UserControllerTest {
@LocalServerPort
private int port
;
private URL base
;
@Autowired
private TestRestTemplate template
;
@Before
public void setup() throws Exception
{
this.base
= new URL(
"http://localhost:" + port
+ "/user/dongshidaddy"
);
}
@Test
public void getHello() throws Exception
{
ResponseEntity
<String> response
= template
.getForEntity(base
.toString(), String
.class);
assertEquals(
"Expect <{\"id\":1,\"username\":\"dongshidaddy\",\"password\":\"111\"}>",
"{\"id\":1,\"username\":\"dongshidaddy\",\"password\":\"111\"}",
response
.getBody()
);
}
}
7：配置文件
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc
:mysql
://localhost
:3306/test
?useUnicode=true
&characterEncoding=utf8
&characterSetResults=utf8
username: root
password: 12345678
jpa:
hibernate:
ddl-auto: update
show-sql: true
8：浏览器访问
9：源码
这里。
最后：都让开，我要喝瑞幸
