HikariCP 个人实例

1.pom依赖

        <!--HikariCP数据库连接池-->
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
            <version>2.7.2</version>
        </dependency>

2.配置文件

spring.mysql.devcenter.datasource.url=jdbc:mysql://XXX.XX.XX.XX:XXXX/XXXXXXXXXXXX?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
spring.mysql.devcenter.datasource.username=XXXXXX
spring.mysql.devcenter.datasource.password=XXXXXX
spring.mysql.devcenter.datasource.driverClassName=com.mysql.jdbc.Driver

3.java实现

package com.hzcominfo.hik.hikbigscreen.common;


import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

public class HikariPoolManager {

    private static Logger logger = LoggerFactory.getLogger(HikariPoolManager.class);

    private static final String DB_CONFIG_FILE = "/application-jdbc.properties";

    // 数据库服务器addr
    private static String db_url = null;
    // 数据库登录用户名
    private static String db_username = null;
    // 数据库登录密码
    private static String db_password = null;
    // 数据库驱动
    private static String driverClassName = null;
    // 数据库连接数
    private static short db_max_conn = 0;
    // 数据库连接端口
    private static short db_port = 0;
    // 数据库名称
    private static String db_name = null;

    private static HikariDataSource dataSource;
    private static HikariPoolManager hikariPoolManager;

    /**
     * 单例模式
     *
     * @return
     */
    public static HikariPoolManager getInstance() {
        if (hikariPoolManager == null) hikariPoolManager = new HikariPoolManager();
        return hikariPoolManager;
    }

    /**
     * 启动
     *
     * @throws IOException
     * @throws SQLException
     */
    public static void start() throws IOException, SQLException {
        logger.info("连接池初始化Start!!!");
        Properties properties = new Properties();
        InputStream in = HikariPoolManager.class.getClass().getResourceAsStream(DB_CONFIG_FILE);
        properties.load(in);

        db_url = String.valueOf(properties.getProperty("spring.mysql.devcenter.datasource.url"));
        db_username = String.valueOf(properties.getProperty("spring.mysql.devcenter.datasource.username"));
        db_password = String.valueOf(properties.getProperty("spring.mysql.devcenter.datasource.password"));
        driverClassName = String.valueOf(properties.getProperty("spring.mysql.devcenter.datasource.driverClassName"));

        if (db_url == null || db_url.length() == 0) {
            logger.error("配置的数据库ip地址错误!");
            System.exit(0);
        }

        HikariConfig config = new HikariConfig();
        config.setJdbcUrl(db_url);
        config.setUsername(db_username);
        config.setPassword(db_password);
        config.setDriverClassName(driverClassName);
        config.addDataSourceProperty("cachePrepStmts", "true");
        config.addDataSourceProperty("prepStmtCacheSize", "250");
        config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");
        // 设置连接超时为8小时
        config.setConnectionTimeout(8 * 60 * 60);
        dataSource = new HikariDataSource(config);

        logger.info("连接池初始化End!!!");
    }

    /**
     * 打开连接
     *
     * @return
     * @throws SQLException
     */
    public synchronized static Connection getConnection() throws SQLException {
        try {
            return dataSource.getConnection();
        } catch (SQLException e) {
            logger.error("error:" + e.getMessage());
            dataSource.close();
            return null;
        }
    }

    /**
     * 关闭连接
     *
     * @return
     * @throws SQLException
     */
    public boolean stop() throws SQLException {
        dataSource.close();
        return true;
    }
}

package com.hzcominfo.hik.hikbigscreen.common;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.sql.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 公共工具Component
 *
 * @author hzcominfo
 */
@Component
public class CommonComponent {

    protected Logger logger = LoggerFactory.getLogger(this.getClass());

    /**
     * key位填类型,value位填传参的值
     *
     * @param sql
     * @param param
     * @return
     */
    // 获取JDBC的数据,并返回list数据,每条信息放在Map中
    public List<Map<String, Object>> getJdbcData(String sql, Object[] param) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
        try {
            conn = HikariPoolManager.getConnection();
            pstmt = conn.prepareStatement(sql);
            if (param != null) {
                if (param.length > 0) {
                    for (int i = 0; i < param.length; i++) {
                        pstmt.setObject(i + 1, param[i]);
                    }
                }
            }
            ResultSet rs = pstmt.executeQuery();
            // 获取列信息
            ResultSetMetaData columns = rs.getMetaData();
            // 列数量
            int columnNum = columns.getColumnCount();
            while (rs.next()) {
                Map<String, Object> resultMap = new HashMap<String, Object>();
                // 将结果返回成Map，key为列表名，value为该字段的值
                for (int j = 1; j <= columnNum; j++) {
                    resultMap.put(columns.getColumnName(j), rs.getString(j));
                }
                list.add(resultMap);
            }
            return list;
        } catch (Exception e) {
            logger.error("sql: " + sql);
            logger.error("Exception: " + e.getMessage(), e);
            return list;
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                    conn = null;
                }
                if (pstmt != null) {
                    pstmt.close();
                }
            } catch (SQLException e) {
                logger.error("sql: " + sql);
                logger.error("SQLException: " + e.getMessage(), e);
            }
        }
    }

}

package com.hzcominfo.hik.hikbigscreen;

import com.hzcominfo.hik.hikbigscreen.common.HikariPoolManager;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.solr.SolrAutoConfiguration;
import org.springframework.boot.web.support.SpringBootServletInitializer;

import java.io.IOException;
import java.sql.SQLException;

@SpringBootApplication(exclude = {SolrAutoConfiguration.class})
public class Application extends SpringBootServletInitializer {

    public static void main(String[] args) throws IOException, SQLException {
        SpringApplication app = new SpringApplication(Application.class);
        app.setWebEnvironment(true);
        HikariPoolManager.start();
        app.run(args);

    }
}

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