Spring第八篇【JdbcTemplate】

导入坐标

<?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>org.example</groupId>
    <artifactId>JdbcTemplate</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.8.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.21</version>
        </dependency>
    </dependencies>

</project>

Spring配置类

package com.example.demo.config;

import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;
import java.beans.PropertyVetoException;

@Configuration
@PropertySource("classpath:jdbc.properties")
public class SpringConfiguration {

    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.user}")
    private String user;
    @Value("${jdbc.password}")
    private String password;

    @Bean
    public DataSource getDataSource() throws PropertyVetoException {
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setDriverClass(driver);
        comboPooledDataSource.setJdbcUrl(url);
        comboPooledDataSource.setUser(user);
        comboPooledDataSource.setPassword(password);
        return comboPooledDataSource;
    }

    @Bean
    public JdbcTemplate getJdbcTemplate(DataSource comboPooledDataSource) {
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(comboPooledDataSource);
        return jdbcTemplate;
    }
}

测试

import com.example.demo.config.SpringConfiguration;
import com.example.demo.domain.Account;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;

import javax.sql.DataSource;
import java.util.List;

@RunWith(SpringRunner.class)
@ContextConfiguration(classes = SpringConfiguration.class)
public class JdbcTemplateTest {

    @Autowired
    private JdbcTemplate jdbcTemplate;

    //插入
    @Test
    public void insertTest() {
        int row = jdbcTemplate.update("insert into account values (?,?)", "张三", 10000);
        System.out.println(row);
    }

    //更新
    @Test
    public void updateTest() {
        int row = jdbcTemplate.update("update account set money = ? where name = '张三'",50000);
        System.out.println(row);
    }

    //删除
    @Test
    public void deleteTest() {
        int row = jdbcTemplate.update("delete from account where name = '张三'");
        System.out.println(row);
    }

    //查询所有
    @Test
    public void selectAllTest(){
        List<Account> accountList = jdbcTemplate.query("select * from account", new BeanPropertyRowMapper<Account>(Account.class));
        System.out.println(accountList);
    }

    //查询一个
    @Test
    public void selectOneTest() {
        Account account = jdbcTemplate.queryForObject("select * from account where name = ?", new BeanPropertyRowMapper<Account>(Account.class), "张三");
        System.out.println(account);
    }

    //聚合函数查询
    @Test
    public void selectOtherTest() {
        Integer row = jdbcTemplate.queryForObject("select count(*) from account",Integer.class);
        System.out.println(row);
    }
    
}