使用Spring Boot+MyBatis框架做查詢操作
二.在Type處選擇: Maven Project(項目的構建工具)
三.創建依賴時勾上web,mybatis,mysql(這個看你個人需要吧,可以自主選擇)
建立好的項目結構如下:
註意:application.properties和application.yml是同一個東西,均為項目的核心配置文件
內容如下:
#連接數據庫
spring.datasource.url=jdbc:mysql://localhost:3306/smbms
spring.datasource.username=root
spring.datasource.password=1234spring.datasource.driverClassName=com.mysql.jdbc.Driver
#引入mybatis的配置文件
mybatis:
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.type-aliases-package=com.example.sprboot.pojo
相應的pom.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId> <artifactId>springboot</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>springboot</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <!--添加web依賴--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--引入spring boot包--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- Spring-Mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.0</version> </dependency> <!-- MySQL --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!--使用json對象--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.49</version> </dependency> <!--使用thymeleaf標簽--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
</project>
相應的接口UserMapper如下:
@Repository
public interface UserMapper {
List<User> getList();
}
service如下:
public interface UserService {
List<User> getList();
}
impl如下:
@Service
public class UserServiceImpl implements UserService {@Resource
br/>@Resource
br/>@Override
return userMapper.getList();
}
}
在resources中建一個文件夾mapper裏面放mapper.xml文件,代碼如下:
<table>
<th>工號</th>
<th>用戶名</th>
<th>姓名</th>
<th>性別</th>
<th>生日</th>
<th>電話</th>
<th>地址</th>
<th>創建時間</th>
<tr th:each="user : ${users}">
<td th:text="${user.id}"></td>
<td th:text="${user.userCode}"></td>
<td th:text="${user.userName}"></td>
<td th:text="${user.gender}"></td>
<td th:text="${user.birthday}"></td>
<td th:text="${user.phone}"></td>
<td th:text="${user.address}"></td>
<td th:text="${user.createdBY}"></td>
</tr>
</table>
此處有一個th標簽,需要引入一個<html xmlns:th="http://www.thymeleaf.org">
並在pom.xml中引入對應的jar包(html中不能使用jstl表達式)
大家可以擴展一下thymeleaf的知識
控制器代碼如下:
@Controller
public class UserController {@Resource
br/>@Resource
br/>@RequestMapping("/")
List<User> list=userService.getList();
model.addAttribute("users",list);
System.out.println(list);
return "/index.html";
}
}
註:在調通的時候,可能會報很多的錯,基本上都是註解的使用出錯,希望各位能夠細心點
使用Spring Boot+MyBatis框架做查詢操作