JAVA springboot微服务b2b2c电子商务系统（三）SpringBoot用JdbcTem

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 { @Autowired private JdbcTemplate jdbcTemplate; @Override public int add(Account account) { return jdbcTemplate.update("insert into account(name, money) values(?, ?)",
              account.getName(),account.getMoney());
 
    } @Override public int update(Account account) { return jdbcTemplate.update("UPDATE  account SET NAME=? ,money=? WHERE id=?",
                account.getName(),account.getMoney(),account.getId());
    } @Override public int delete(int id) { return jdbcTemplate.update("DELETE from TABLE account where id=?",id);
    } @Override public 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;
        }
    } @Override public 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构建的B2B2C电子商务平台源码请加企鹅求求：yuncode.net