1.引入相关的maven依赖:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>2.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.197</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.6</version>
</dependency>
2.在application.properties文件中进行配置:
# 数据源配置
# 使用H2数据库
spring.datasource.platform=h2
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.url=jdbc:h2:tcp://localhost/~/test
spring.datasource.username=root
spring.datasource.password=123456
# 数据项配置
spring.datasource.schema=classpath:db/user.sql
# 配置h2的远程访问
spring.h2.console.settings.web-allow-others=true
# 配置程序开启时就会启动h2 web consloe
spring.h2.console.enabled=true
#,进行该配置,你就可以通过YOUR_URL/h2-console访问h2 web consloe。YOUR_URL是你程序的访问URl
spring.h2.console.path=/h2-console
# 显示sql语句
spring.jpa.show-sql = true
# 这个必须加,每次启动对应实体
spring.jpa.hibernate.ddl-auto = update
# 是否生成ddl语句
spring.jpa.generate-ddl=false
3.编写对应的model:
package com.zhiyi.h2.model;
import lombok.Data;
import javax.persistence.*;
@Entity
@Table(name="user")
@Data
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@Column
private String name;
@Column
private String phone;
public Integer getId() {
return id;
}
public String getName() {
return name;
}
public String getPhone() {
return phone;
}
public void setId(Integer id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
注意:上面的注解(@Entity,@Table(name=“user”),@Data,@Id,@GeneratedValue(strategy = GenerationType.IDENTITY),@Column)是lombok中的,建议花费五分钟自行学习一下,很有用
4.编写对应的Dao:
package com.zhiyi.h2.dao;
import com.zhiyi.h2.model.User;
import org.springframework.data.repository.CrudRepository;
public interface H2Dao extends CrudRepository<User,Long> {
User findByName(String name);
@Override
Iterable<User> findAll();
@Override
void delete(User user);
}
注意:delete中的对象不是自己创建的,而是先自己通过查询,然后在进行删除,下面我会在测试用例中体现
5.编写对应的测试用例:
package com.zhiyi.h2.test;
import com.zhiyi.h2.model.User;
import com.zhiyi.h2.dao.H2Dao;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class H2Test {
@Autowired
private H2Dao H2Service;
@Test
public void testGetUserByName(){
User user=H2Service.findByName("zx");
System.out.println("查询到用户名为:"+user.getName()+"的电话为:"+user.getPhone());
}
@Test
public void testGetUserAll(){
Iterable<User>userIterable=H2Service.findAll();
for(User user:userIterable){
System.out.println("查询到用户名为:"+user.getName()+"的电话为:"+user.getPhone());
}
}
@Test
public void getUserByPhone(){
String phone="123456";
List<User>userList= H2Service.findUserByPhone(phone);
Integer userNu=userList.size();
System.out.println("通过电话"+phone+"查询到"+userNu+"为用户");
}
@Test
public void delUserByPhone(){
String phone="123456";
List<User>userList= H2Service.findUserByPhone(phone);
H2Service.delete(userList.get(0));
}
}
到此集成h2就此结束了