1.maven引入配置
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Spring Boot JPA -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- MYSQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
2.prpperties配置
#mysql
spring.datasource.url=jdbc:mysql://localhost:3306/ncdg
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#jpa
spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
3.写entity.java
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
/**
*
* @author lili
*/
@Entity
public class User {
@Id
@GeneratedValue
private long id;
private String username;
private String password;
private String account;
private String position;
private String levels;
private Long userId;
/**
* @return the id
*/
public long getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(long id) {
this.id = id;
}
/**
* @return the username
*/
public String getUsername() {
return username;
}
/**
* @param username the username to set
*/
public void setUsername(String username) {
this.username = username;
}
/**
* @return the password
*/
public String getPassword() {
return password;
}
/**
* @param password the password to set
*/
public void setPassword(String password) {
this.password = password;
}
/**
* @return the account
*/
public String getAccount() {
return account;
}
/**
* @param account the account to set
*/
public void setAccount(String account) {
this.account = account;
}
/**
* @return the position
*/
public String getPosition() {
return position;
}
/**
* @param position the position to set
*/
public void setPosition(String position) {
this.position = position;
}
/**
* @return the levels
*/
public String getLevels() {
return levels;
}
/**
* @param levels the levels to set
*/
public void setLevels(String levels) {
this.levels = levels;
}
/**
* @return the userId
*/
public Long getUserId() {
return userId;
}
/**
* @param userId the userId to set
*/
public void setUserId(Long userId) {
this.userId = userId;
}
};
4.写接口repository接口
import com.mycompany.ncdg.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
/**
*
* @author lili
*/
public interface UserRepository extends JpaRepository<User, Long> {
@Query("from User u where u.username=:username")
User findUser(@Param("username") String username);
}
5.写controller
import com.mycompany.ncdg.entity.User;
import com.mycompany.ncdg.repository.UserRepository;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
*
* @author lili
*/
@RestController
public class UserController {
@Autowired
UserRepository userRepository;
@RequestMapping("/userall")
public List<User> all(){
return userRepository.findAll();
};
}
6.启动springboot的主类
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
*
* @author lili
*/
@SpringBootApplication
public class App {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
SpringApplication.run(App.class, args);
}
}
7.启动成功后 ,访问localhost:8080/userall 得到数据格式如下
[{"id":1,"username":"超级管理员","password":"123456","account":"admin","position":"1","levels":"1","userId":1}]