spring boot 系列之三：spring boot 整合JdbcTemplate

前面两篇文章我们讲了两件事情：

这篇文章我们来看下怎么通过JdbcTemplate进行数据的持久化。

废话不多说，直接上干货。

一、代码实现

修改pom文件，引入相关依赖

<!-- 引入jdbc 依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- 引入 mysql 数据库连接依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

配置数据库信息，在application.properties中添加如下内容：

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root

创建实体类并创建数据库

实体类

package com.study.entity;public class User {    private Integer id;
    private String userName;
    private String password;    public Integer getId() {
        return id;
    }    public void setId(Integer id) {
        this.id = id;
    }    public String getUserName() {
        return userName;
    }    public void setUserName(String userName) {
        this.userName = userName;
    }    public String getPassword() {
        return password;
    }    public void setPassword(String password) {
        this.password = password;
    }}

数据库

实现dao层

@Repository
public class UserDao {    @Autowired
    JdbcTemplate jdbcTemplate;    public void save(User user) {
        String sql = "insert into t_user(user_name, password) values(?,?)";
        jdbcTemplate.update(sql, user.getUserName(), user.getPassword());
    }
}

实现service层

接口

public interface UserService {    public void save(User user);
}

实现类

@Service
public class UserServiceImpl implements UserService {    @Autowired
    UserDao userDao;    public void save(User user){
        userDao.save(user);
    }}

实现controller层

@RestController
public class UserController {
    @Autowired
    UserService service;    @RequestMapping("/saveUser")
    public String saveUser(User user) {        service.save(user);
        return "save user successful";
    }
}