自己動手搭建簡單的Spring Boot專案
阿新 • • 發佈：2021-07-05
搭建簡單的Spring Boot專案
1.引入web，mybatis，thymeleaf相關的jar包。
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <!-- <scope>runtime</scope>-->//需要註釋掉，否則application.yml中driver-class-name報錯。 </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId>//注意引入的mybatis包。 <version>1.3.2</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.20</version> </dependency>
2.application.properties中配置，mysql 、mybatis。
spring.datasource.url=jdbc:mysql://localhost:3306/springboot_tmp?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver # 根據自己專案的情況進行配置 mybatis.mapper-locations=classpath:mapper/*.xml mybatis.type-aliases-package=com.example.user.entity
3.專案結構如下：
java
-com
example
user
controller
dao
entity
service
-impl
resources
mapper
static
templates
4.UserController.java
@RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @GetMapping("/list") public ModelAndView queryList(){ ModelAndView modelAndView= new ModelAndView(); List<User> users = userService.queryList(); modelAndView.addObject("users",users); modelAndView.setViewName("index"); return modelAndView; } }
UserServiceImpl.java
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
public List<User> queryList(){
return userDao.queryList();
}
}
UserDao.java
@Repository
//@Mapper 如果在啟動類新增掃描註解的話，可以不加此註解。
public interface UserDao {
List<User> queryList();
}
User.java
@ToString
@Data
public class User {
private Integer id;
private String name;
private Integer age;
private String address;
}
Application
@SpringBootApplication
@MapperScan("com.example.user.dao")//注意如果不想每個資料庫持久層都加@Mapper的話，就加上這段掃描
public class Application {
public static void main(String[] args) {
SpringApplication.run(Springboot01Application.class, args);
}
}
5.index.html 頁面直接放在 templates 目錄下
<!DOCTYPE html>
<!-- 如果想讓頁面有提示，就加上thymeleaf的名稱空間-->
<html xmlns:th="http://www.thymeleaf.org">
<html lang="en">
<head>
<meta charset="UTF-8">
<title>thymeleaf</title>
</head>
<body>
<table>
<tr>
<th>#id</th>
<th>#name</th>
<th>#age</th>
<th>#address</th>
</tr>
<tr th:each="user,stat : ${users}">
<!-- <td th:text="${stat.count}"></td>-->
<td th:text="${user.id}"></td>
<td th:text="${user.name}"></td>
<td th:text="${user.age}"></td>
<td th:text="${user.address}"></td>
</tr>
</table>
</body>
</html>