本篇文章主要介绍了SpringBoot用JdbcTemplates访问Mysql实例代码，非常具有实用价值，需要的朋友可以参考下
本文介绍springboot通过jdbc访问关系型MySQL,通过spring的JdbcTemplate去访问。
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：
org.springframework.bootspring-boot-starter-jdbc
引入mysql连接类和连接池：
mysqlmysql-connector-javaruntime com.alibabadruid1.0.29
开启web:
org.springframework.bootspring-boot-starter-web
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 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 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 findAccountList() { List list = jdbcTemplate.query("select * from account", new Object[]{}, new BeanPropertyRowMapper(Account.class)); if(list!=null && list.size()>0){ return list; }else{ return null; } } }
service层
public interface IAccountService { int add(Account account); int update(Account account); int delete(int id); Account findAccountById(int id); List findAccountList(); }
具体实现类：
@Service public class AccountService implements IAccountService { @Autowired IAccountDAO accountDAO; @Override public int add(Account account) { return accountDAO.add(account); } @Override public int update(Account account) { return accountDAO.update(account); } @Override public int delete(int id) { return accountDAO.delete(id); } @Override public Account findAccountById(int id) { return accountDAO.findAccountById(id); <b style="color:transparent">来源gao@!dai!ma.com搞$$代^@码!网</b>} @Override public List findAccountList() { return accountDAO.findAccountList(); } }
构建一组restful api来展示
package com.forezp.web; import com.forezp.entity.Account; import com.forezp.service.IAccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.List; /** * Created by fangzhipeng on 2017/4/20. */ @RestController @RequestMapping("/account") public class AccountController { @Autowired IAccountService accountService; @RequestMapping(value = "/list",method = RequestMethod.GET) public List getAccounts(){ return accountService.findAccountList(); } @RequestMapping(value = "/{id}",method = RequestMethod.GET) public Account getAccountById(@PathVariable("id") int id){ return accountService.findAccountById(id); } @RequestMapping(value = "/{id}",method = RequestMethod.PUT) public String updateAccount(@PathVariable("id")int id , @RequestParam(value = "name",required = true)String name, @RequestParam(value = "money" ,required = true)double money){ Account account=new Account(); account.setMoney(money); account.setName(name); account.setId(id); int t=accountService.update(account); if(t==1){ return account.toString(); }else { return "fail"; } } @RequestMapping(value = "",method = RequestMethod.POST) public String postAccount( @RequestParam(value = "name")String name, @RequestParam(value = "money" )double money){ Account account=new Account(); account.setMoney(money); account.setName(name); int t= accountService.add(account); if(t==1){ return account.toString(); }else { return "fail"; } } }
可以通过postman来测试，具体的我已经全部测试通过，没有任何问题。注意restful构建api的风格。
源码下载：https://github.com/forezp/SpringBootLearning
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