在 Java 項(xiàng)目開發(fā)中少不了要和數(shù)據(jù)庫進(jìn)行交互,而 Java 是通過 jdbc 來和數(shù)據(jù)庫建立關(guān)系。本文將為大家介紹用 Java 實(shí)例代碼解決SpringBoot 框架關(guān)于 jdbc 的支持問題。
項(xiàng)目結(jié)構(gòu)
pom.xml
pom.xml:
<?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">
<parent>
<artifactId>spring-boot-02</artifactId>
<groupId>com.keafmd</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-boot-08</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 解析jsp類庫 -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- JDBC-啟動器, 默認(rèn)的數(shù)據(jù)源 HikariCP -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- JDBC-啟動器, 默認(rèn)的數(shù)據(jù)源 HikariCP -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
application.yml
server: port: 80 spring: datasource: url: jdbc:mysql://127.0.0.1:3306/ssm-java1?useSSL=false driver-class-name: com.mysql.jdbc.Driver username: root password: 18044229
啟動類
package com.keafmd;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class App08 {
public static void main(String[] args) {
SpringApplication.run(App08.class, args);
}
}
Dao層
UserDao:
package com.keafmd.dao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public class UserDao {
@Autowired
JdbcTemplate jdbcTemplate;
public List userList(){
String sql ="select * from user";
return jdbcTemplate.queryForList(sql);
}
}
Service層
IUserService :
package com.keafmd.service;
import java.util.List;
public interface IUserService {
List list();
}
UserServiceImpl:
package com.keafmd.service.impl;
import com.keafmd.dao.UserDao;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements IUserService {
@Autowired
UserDao userDao;
@Override
public List list() {
return userDao.userList();
}
}
Controller層
UserController:
package com.keafmd.controller;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
public class UserController {
@Autowired
IUserService userService;
/**
* http://127.0.0.1/userlist
* @return
*/
@RequestMapping("userlist")
List UserList(){
return userService.list();
}
}
測試類測試
UserDaoTest:
package com.keafmd.dao;
import com.keafmd.App08;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
@SpringBootTest(classes = App08.class)
class UserDaoTest {
@Autowired
UserDao userDao;
@Test
public void test(){
List userlist = userDao.userList();
for (Object o : userlist) {
System.out.println(o);
}
}
}
運(yùn)行test方法的效果:
運(yùn)行啟動類,測試效果
運(yùn)行啟動類,訪問:http://127.0.0.1/userlist
以上就是關(guān)于用實(shí)例代碼解決 SpringBoot 關(guān)于 jdbc 的支持問題的全部內(nèi)容,想要了解更多相關(guān) SpringBoot 框架其他方面應(yīng)用的內(nèi)容請搜索W3Cschool以前的文章或繼續(xù)瀏覽下面的相關(guān)文章,希望大家以后多多支持我們!