Druid 使用

不念不忘少年蓝@ 2022-10-27 01:40 127阅读 0赞

pom.xml

<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>
    
        <parent>
            <groupId>constxiong</groupId>
            <artifactId>demo</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </parent>
        <artifactId>druid-datasource-pool</artifactId>
    
        <dependencies>
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.2.4</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.21</version>
            </dependency>
        </dependencies>
    
        <build>
    
        </build>
    </project>

java 代码

package constxiong;
    
    import com.alibaba.druid.pool.DruidDataSource;
    
    import java.sql.Connection;
    import java.sql.ResultSet;
    import java.sql.Statement;
    
    /**
     * 测试 druid 数据库连接池
     */
    public class Test {
    
        public static void main(String[] args) throws Exception {
            DruidDataSource ds = new DruidDataSource();
            ds.setDriverClassName("com.mysql.cj.jdbc.Driver");
            ds.setUrl("jdbc:mysql://localhost:3306/constxiong?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8");
            ds.setUsername("root");
            ds.setPassword("constxiong@123");
            try (Connection connection = ds.getConnection(); Statement statement = connection.createStatement()){
                 statement.execute("select * from user");
                 try(ResultSet resultSet = statement.getResultSet()){
                     while (resultSet.next()) {
                         Integer id = resultSet.getInt(1);
                         String name = resultSet.getString(2);
                         System.out.println(id + "-" + name);
                     }
                 }
            }
            ds.close();
        }
    }

打印结果

一月 19, 2021 11:02:30 上午 com.alibaba.druid.pool.DruidDataSource info
    信息: {dataSource-1} inited
    1-ConstXiong1
    2-ConstXiong2
    3-ConstXiong3
    4-ConstXiong4
    5-ConstXiong5
    一月 19, 2021 11:02:31 上午 com.alibaba.druid.pool.DruidDataSource info
    信息: {dataSource-1} closing ...
    一月 19, 2021 11:02:31 上午 com.alibaba.druid.pool.DruidDataSource info
    信息: {dataSource-1} closed

--------------------

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--------------------

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*  [基础与语法][Link 1]
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 *  [Web][]
 *  [安全][Link 5]
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[Java 8 Stream API Demo]: https://www.javanav.com/val/5be3f821d00e4cc5b6177c9d0e5dd30f.html
[Druid]: https://www.javanav.com/val/79860880b84442cfb0f6f5e094d53105.html
[libreoffice_word _ pdf]: https://www.javanav.com/val/501ababe5c48493780ed23dbbc7b2cbc.html
[Java]: https://www.javanav.com/val/ab11038d7de64b4b8c0e384d1d4a9ab0.html
[openjdk jol _ Java]: https://www.javanav.com/val/66e564087e244b2f99f85091de029605.html
[Spring_MyBatis]: https://www.javanav.com/val/687c224b31a34d3c9f99fee67e3d5bcc.html
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[Sharding-JDBC]: https://www.javanav.com/val/eefddd846ae845668daf9d798755c057.html
[JDK1.8 _ API]: https://www.javanav.com/val/fefecf2f089e48b294708e99954c57a1.html
[Sharding-JDBC 1]: https://www.javanav.com/val/f05fe12cb8fd444aaa59fb7f747a3224.html
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[Linux]: https://www.javanav.com/interview/00cccb81729540d1923bd0a0ef49533a.html
[MySQL]: https://www.javanav.com/interview/d311e78502a845f1a4bb307bd6aec2b3.html
[Oracle]: https://www.javanav.com/interview/5f29e9677edf4a16be3dce30d257c9ab.html
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[Dubbo]: https://www.javanav.com/interview/9a3e7a7740324757abaab953f7ebc455.html