【Spring】配置druid連接池並初始化JdbcTemplate

---

導入庫和依賴

配置druid.properties配置文件

此處使用的是mysql-connector-java-8連接器, 因此驅動器路徑(driverClassName)與5的不同

driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/score_management_db?characterEncoding=UTF-8&serverTimezone=UTC
username=root
password=123123
# 初始化連接數量
initialSize=5
# 最大連接數
maxActive=10
# 最大等待時間
maxWait=3000

timeBetweenEvictionRunsMillis=60000
minEvictableIdleTimeMillis=300000
validationQuery=SELECT 1
testWhileIdle=true
testOnBorrow=false
testOnReturn=false
poolPreparedStatements=true
maxPoolPreparedStatementPerConnectionSize=200

寫一個JDBCUtil工具類

import com.alibaba.druid.pool.DruidDataSourceFactory;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import javax.sql.DataSource;

public class JDBCUtil {
    private static DataSource ds;
    
    static {
        Properties prop = new Properties();
        InputStream is = Main.class.getClassLoader().getResourceAsStream("druid.properties");

        try {
            prop.load(is);
            ds = DruidDataSourceFactory.createDataSource(prop);
        } catch (Exception var3) {
            var3.printStackTrace();
        }
    }

    public JDBCUtil() {
    }

    public static Connection getConnection() throws SQLException {
        return ds.getConnection();
    }

    public static void close(Statement stat, Connection conn) {
        close((ResultSet)null, stat, conn);
    }

    public static DataSource getDataSource() {
        return ds;
    }

    public static void close(ResultSet rs, Statement stat, Connection conn) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException var6) {
                var6.printStackTrace();
            }
        }

        if (stat != null) {
            try {
                stat.close();
            } catch (SQLException var5) {
                var5.printStackTrace();
            }
        }

        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException var4) {
                var4.printStackTrace();
            }
        }

    }
}

使用

JdbcTemplate template = new JdbcTemplate(JDBCUtil.getDataSource());

Q&A 請指正!