使用Spring Boot整合数据库,整合Druid数据源的方法,整合Mybatis的方法,整合JDBCTemplate的方法设计一个数据库项目,分别采用Druid、Mybaties、JDBCTemplate的整合技术,通过定义xml依赖文件和properties属性配置文件,定义实体类,编写持久层、Service层、controller层,完成系统的CRUD功能。
时间: 2024-03-09 17:50:27 浏览: 72
好的,我会尽力回答。
首先,我们需要在pom.xml文件中添加相关依赖,包括Spring Boot、Druid、Mybatis和JDBCTemplate。具体可以参考以下代码:
```xml
<dependencies>
<!-- Spring Boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.21</version>
</dependency>
<!-- Mybatis -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.0</version>
</dependency>
<!-- JDBCTemplate -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
</dependencies>
```
然后,在application.properties文件中配置Druid和Mybatis的相关属性,例如:
```properties
# Druid
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
# Mybatis
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.configuration.map-underscore-to-camel-case=true
```
接下来,我们需要编写实体类,并使用注解标注每个属性对应的数据库字段,例如:
```java
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "username")
private String username;
@Column(name = "password")
private String password;
// getter和setter方法
}
```
在持久层中,我们可以使用Mybatis提供的注解或XML配置来实现CRUD操作。例如,使用注解的方式:
```java
@Mapper
public interface UserMapper {
@Select("SELECT * FROM user WHERE id = #{id}")
User findById(Long id);
@Insert("INSERT INTO user (username, password) VALUES (#{username}, #{password})")
void save(User user);
@Update("UPDATE user SET username = #{username}, password = #{password} WHERE id = #{id}")
void update(User user);
@Delete("DELETE FROM user WHERE id = #{id}")
void delete(Long id);
}
```
使用XML配置的方式:
UserMapper.xml
```xml
<mapper namespace="com.example.mapper.UserMapper">
<select id="findById" resultType="User">
SELECT * FROM user WHERE id = #{id}
</select>
<insert id="save" parameterType="User">
INSERT INTO user (username, password) VALUES (#{username}, #{password})
</insert>
<update id="update" parameterType="User">
UPDATE user SET username = #{username}, password = #{password} WHERE id = #{id}
</update>
<delete id="delete" parameterType="Long">
DELETE FROM user WHERE id = #{id}
</delete>
</mapper>
```
然后,在Service层中调用持久层的方法来实现业务逻辑。例如:
```java
@Service
public class UserService {
@Autowired
private UserMapper userMapper;
public User findById(Long id) {
return userMapper.findById(id);
}
public void save(User user) {
userMapper.save(user);
}
public void update(User user) {
userMapper.update(user);
}
public void delete(Long id) {
userMapper.delete(id);
}
}
```
最后,在controller层中编写对应的接口来暴露服务。例如:
```java
@RestController
@RequestMapping("/users")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/{id}")
public User findById(@PathVariable Long id) {
return userService.findById(id);
}
@PostMapping
public void save(@RequestBody User user) {
userService.save(user);
}
@PutMapping
public void update(@RequestBody User user) {
userService.update(user);
}
@DeleteMapping("/{id}")
public void delete(@PathVariable Long id) {
userService.delete(id);
}
}
```
这样,我们就完成了一个基于Spring Boot、Druid、Mybatis和JDBCTemplate的数据库项目,通过定义xml依赖文件和properties属性配置文件,定义实体类,编写持久层、Service层、controller层,完成系统的CRUD功能。
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