# application.properties配置示例
server.port=8080
spring.application.name=demo

# 数据库配置
spring.datasource.url=jdbc:mysql://fgedudb:3306/test
spring.datasource.username=root
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

# JPA配置
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

# application.yml配置示例
server:
port: 8080
spring:
application:
name: demo
datasource:
url: jdbc:mysql://fgedudb:3306/test
username: root
password: password
driver-class-name: com.mysql.cj.jdbc.Driver
jpa:
hibernate:
ddl-auto: update
show-sql: true

// 控制器示例
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

@GetMapping(“/hello”)
public String hello(@RequestParam(name = “name”, defaultValue = “World”) String name) {
return “Hello, ” + name + “!”;
}
}

// 启动类
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

// 运行应用
# mvn spring-boot:run

// 访问应用
# curl http://fgedudb:8080/hello
Hello, World!

// 实体类
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;

@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
private String email;

// getter和setter方法
public Long getId() { return id; }
public void setId(Long id) { this.id = id; }
public String getName() { return name; }
public void setName(String name) { this.name = name; }
public String getEmail() { return email; }
public void setEmail(String email) { this.email = email; }
}

// 仓库接口
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository {
User findByEmail(String email);
}

// 服务类
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {
@Autowired
private UserRepository userRepository;

public User saveUser(User user) {
return userRepository.save(user);
}

public User getUserById(Long id) {
return userRepository.findById(id).orElse(null);
}

public User getUserByEmail(String email) {
return userRepository.findByEmail(email);
}
}

// 单元测试示例
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import static org.junit.jupiter.api.Assertions.assertEquals;

@SpringBootTest
public class HelloControllerTest {

@Test
public void testHello() {
HelloController controller = new HelloController();
String result = controller.hello(“Test”);
assertEquals(“Hello, Test!”, result);
}
}

// 集成测试示例
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.web.servlet.MockMvc;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@SpringBootTest
@AutoConfigureMockMvc
public class WebIntegrationTest {

@Autowired
private MockMvc mockMvc;

@Test
public void testHelloEndpoint() throws Exception {
mockMvc.perform(get(“/hello”))
.andExpect(status().isOk())
.andExpect(content().string(“Hello, World!”));
}
}

// 安全配置
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers(“/public/**”).permitAll()
.anyRequest().authenticated()
.and()
.formLogin()
.loginPage(“/login”)
.permitAll()
.and()
.logout()
.permitAll();
}
}