本文介紹springboot通過(guò)jdbc訪問(wèn)關(guān)系型MySQL,通過(guò)spring的JdbcTemplate去訪問(wèn)。
準(zhǔn)備工作
- jdk 1.8
- maven 3.0
- idea
- mysql
初始化mysql:
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-- create table `account`DROP TABLE `account` IF EXISTSCREATE 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'); |
創(chuàng)建工程
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連接類和連接池：
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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> |
開啟web:
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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> |
配置相關(guān)文件
在application.properties文件配置mysql的驅(qū)動(dòng)類，數(shù)據(jù)庫(kù)地址，數(shù)據(jù)庫(kù)賬號(hào)、密碼信息。
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spring.datasource.driver-class-name=com.mysql.jdbc.Driverspring.datasource.url=jdbc:mysql://localhost:3306/testspring.datasource.username=rootspring.datasource.password=123456 |
通過(guò)引入這些依賴和配置一些基本信息，springboot就可以訪問(wèn)數(shù)據(jù)庫(kù)類。
具體編碼
實(shí)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(shí)現(xiàn)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. */@Repositorypublic 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; } }} |
service層
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public interface IAccountService { int add(Account account); int update(Account account); int delete(int id); Account findAccountById(int id); List<Account> findAccountList();} |
具體實(shí)現(xiàn)類：
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@Servicepublic 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); } @Override public List<Account> findAccountList() { return accountDAO.findAccountList(); }} |
構(gòu)建一組restful api來(lái)展示
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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<Account> 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"; } }} |
可以通過(guò)postman來(lái)測(cè)試，具體的我已經(jīng)全部測(cè)試通過(guò)，沒有任何問(wèn)題。注意restful構(gòu)建api的風(fēng)格。
源碼下載：https://github.com/forezp/SpringBootLearning
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：http://blog.csdn.net/forezp/article/details/70477821
