准备工作

• jdk 1.8
• maven 3.0
• idea
• mysql

初始化mysql:

-- create table `account`
DROP TABLE `account` IF EXISTS
CREATE TABLE `account` (`id` int(11) NOT NULL AUTO_INCREMENT,`name` varchar(20) NOT NULL,`money` double DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
INSERT INTO `account` VALUES ('1', 'aaa', '1000');
INSERT INTO `account` VALUES ('2', 'bbb', '1000');
INSERT INTO `account` VALUES ('3', 'ccc', '1000');

创建工程

引入依赖：

在pom文件引入spring-boot-starter-jdbc的依赖：

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency>

引入mysql连接类和连接池：

<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.29</version></dependency>

　开启web:

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency>

配置相关文件

在application.properties文件配置mysql的驱动类，数据库地址，数据库账号、密码信息。

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=123456

通过引入这些依赖和配置一些基本信息，springboot就可以访问数据库类。

具体编码

实体类

public class Account {private int id ;private String name ;private double money;....省略了getter. setter}

dao层

public interface IAccountDAO {int add(Account account);int update(Account account);int delete(int id);Account findAccountById(int id);List<Account> findAccountList();
}

具体的实现类：

package com.forezp.dao.impl;import com.forezp.dao.IAccountDAO;
import com.forezp.entity.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;import java.util.List;/*** Created by fangzhipeng on 2017/4/20.*/
@Repository
public class AccountDaoImpl implements IAccountDAO {@Autowiredprivate JdbcTemplate jdbcTemplate;@Overridepublic int add(Account account) {return jdbcTemplate.update("insert into account(name, money) values(?, ?)",account.getName(),account.getMoney());}@Overridepublic int update(Account account) {return jdbcTemplate.update("UPDATE  account SET NAME=? ,money=? WHERE id=?",account.getName(),account.getMoney(),account.getId());}@Overridepublic int delete(int id) {return jdbcTemplate.update("DELETE from TABLE account where id=?",id);}@Overridepublic Account findAccountById(int id) {List<Account> list = jdbcTemplate.query("select * from account where id = ?", new Object[]{id}, new BeanPropertyRowMapper(Account.class));if(list!=null && list.size()>0){Account account = list.get(0);return account;}else{return null;}}@Overridepublic List<Account> findAccountList() {List<Account> list = jdbcTemplate.query("select * from account", new Object[]{}, new BeanPropertyRowMapper(Account.class));if(list!=null && list.size()>0){return list;}else{return null;}}
}

Spring Cloud大型企业分布式微服务云架构源码请加企鹅求求：一七九一七四三三八零