文章目錄
SpringBoot入門知識
SpringBoot入門配置的相關知識在以下鏈接
https://blog.csdn.net/qq_41653935/article/details/104576132
快速搭建
目的：
學習springboot，熟悉快速搭建springboot基本配置
主要涉及SpringBoot、Mybatis、Thymeleaf、通用mapper
1、創建項目
new->project
之後就next->finish。
目標結構圖如下，
2、導入依賴
<parent>
<!-- 父工程 對各種常用依賴（並非全部）的版本進行了管理-->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.5.RELEASE</version>
</parent>
<dependencies>
<dependency>
<!-- web啓動器-->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<!-- SpringBoot會自動爲Thymeleaf註冊一個視圖解析器-->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<!-- mybatis提供的與springboot整合包-->
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<!-- 通用mapper作者提供-->
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>2.0.4</version>
</dependency>
<dependency>
<!-- jdbc的啓動器，默認使用HikariCP連接池 -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<!-- 數據庫驅動-->
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
</dependency>
</dependencies>
3、SpringBootApplication啓動類
@SpringBootApplication
@MapperScan("com.codeying.mapper")//掃描mapper包下的映射
public class SpringBootApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootApplication.class);
}
}
4、application.yml配置文件
配置數據源、端口等
server:
port: 8081
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/數據庫名?serverTimezone=UTC
username: ***
password: ***
5、controller-嘗試啓動
嘗試啓動springboot項目，編寫controller類，這時需要一個hello.html響應，在resources目錄下編寫hello.html隨便顯示一些東西
@Controller
@RequestMapping
public class Mycontroller {
@RequestMapping("hello")
public ModelAndView hello(){
ModelAndView mv=new ModelAndView();
mv.setViewName("hello");
return mv;
}
}
結果
6、實體類和通用mapper
創建以下實體類 並且在數據庫中創建相應數據庫，創建Account表和id,name,money字段，插入一些數據。
Account .java
public class Account {
Integer id;
String name;
Double money;
……
setter getter略
AccountMapper .java
public interface AccountMapper extends Mapper<Account> {
}
7、service
IAccountService 接口
public interface IAccountService {
List<Account> findAll();
}
AccountServise
@Service
public class AccountServise implements IAccountService {
@Autowired
AccountMapper accountMapper;
@Override
public List<Account> findAll() {
return accountMapper.selectAll();
}
}
8、完善controller
添加如下代碼，基本的查詢賬戶功能以及完善，在hello.html中展示賬戶信息
@Autowired
AccountServise accountServise;
@GetMapping("account")
public ModelAndView account(){
ModelAndView mv=new ModelAndView();
List<Account> accounts=accountServise.findAll();
mv.addObject("accounts",accounts);
mv.setViewName("hello");
return mv;
}
完整hello.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>hello,codeying</h1>
<table class="list">
<tr>
<th>id</th>
<th>姓名</th>
<th>餘額</th>
</tr>
<tr th:each="account : ${accounts}">
<td th:text="${account.id}">1</td>
<td th:text="${account.name}">張三</td>
<td th:text="${account.money}">張三</td>
</tr>
</table>
</body>
</html>
測試成功
