Java springcloud B2B2C o2o多用戶商城 springcloud架構（三）SpringBoot用JdbcTemplates訪問Mysql

準備工做

• jdk 1.8
• maven 3.0
• idea
• mysql

初始化mysql:

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-- 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' );

　　

建立工程

引入依賴：

在pom文件引入spring-boot-starter-jdbc的依賴：

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

　　引入mysql鏈接類和鏈接池：

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<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>

　　開啓web:

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

　　

配置相關文件

在application.properties文件配置mysql的驅動類，數據庫地址，數據庫帳號、密碼信息。

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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

　　經過引入這些依賴和配置一些基本信息，springboot就能夠訪問數據庫類。

具體編碼

實體類

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

　　

dao層

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

　　具體的實現類：

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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 ; } } }

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