環境InterlliJ2016.3  MySQL5.7.12

gradle依賴庫：

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.11'
compile 'org.slf4j:slf4j-log4j12:1.7.21'compile 'mysql:mysql-connector-java:5.1.39'compile 'com.zaxxer:HikariCP:2.4.6'
}

配置檔案db.properties

db_url= 192.168.199.132
db_port = 3306
 
db_name = mind
db_max_conn = 100
db_username = root
db_password = root

DBService.Java：

package com.mind.core.db.impl;
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;
/**
 * 資料庫服務
 * Created by Lovell on 16/6/18.
 */
public class DBService {
    private static Logger logger = LoggerFactory.getLogger(DBService.class);
    private static final String DB_CONFIG_FILE = "/db.properties";
 
// 資料庫連線數
private short db_max_conn = 0;
// 資料庫伺服器addr
private String db_url = null;
// 資料庫連線埠
private short db_port = 0;
// 資料庫名稱
private String db_name = null;
// 資料庫登入使用者名稱
private String db_username = null;
// 資料庫登入密碼
private String db_password = null;
// 資料庫連線
private Connection connection;
    private static DBService dBService;
    public static DBService getInstance(){
        if (dBService == null) {
            dBService = new DBService();
}
        return dBService;
}

    public void start() throws IOException, SQLException {
        Properties properties = new Properties();
InputStream in = DBService.class.getClass().getResourceAsStream(DB_CONFIG_FILE);
properties.load(in);
db_max_conn = Short.valueOf(properties.getProperty("db_max_conn"));
db_url = String.valueOf(properties.getProperty("db_url"));
db_port = Short.valueOf(properties.getProperty("db_port"));
db_name = String.valueOf(properties.getProperty("db_name"));
db_username = String.valueOf(properties.getProperty("db_username"));
db_password = String.valueOf(properties.getProperty("db_password"));
        if (db_url == null || db_url.length() == 0) {
            logger.error("配置的資料庫ip地址錯誤!");
System.exit(0);
}

        HikariConfig config = new HikariConfig();
config.setMaximumPoolSize(db_max_conn);
config.setDataSourceClassName("com.mysql.jdbc.jdbc2.optional.MysqlDataSource");
config.addDataSourceProperty("serverName", db_url);
config.addDataSourceProperty("port", db_port);
config.addDataSourceProperty("databaseName", db_name);
config.addDataSourceProperty("user", db_username);
config.addDataSourceProperty("password", db_password);
HikariDataSource dataSource = new HikariDataSource(config);
//        // 也可以這樣寫
//        config.setDriverClassName("com.mysql.jdbc.Driver");
//        config.setJdbcUrl("jdbc:mysql://"+ db_url +"/" + db_name + "?useUnicode=true&characterEncoding=utf8&useSSL=false");
//        config.setUsername(db_username);
//        config.setPassword(db_password);
//        config.addDataSourceProperty("cachePrepStmts", "true");
//        config.addDataSourceProperty("prepStmtCacheSize", "250");
//        config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");
//        // 設定連線超時為8小時
//        config.setConnectionTimeout(8 * 60 * 60);
//        HikariDataSource dataSource = new HikariDataSource(config);}

 

    public Connection getConnection() throws SQLException {
        try {
            return dataSource.getConnection();
} catch (SQLException e) {
            e.printStackTrace();
dataSource.resumePool();
            return null;
}    }

    public boolean stop() throws SQLException {
        dataSource.close();
        return true;
}
}

DBServiceTest.java

package com.mind.core.db.impl;
import java.io.IOException;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
 * Created by Lovell on 16/6/25.
 */
public class DBServiceTest {
    public static void main(String[] args) throws IOException, SQLException {
        DBSservice.getInstance().start();

        // statement用來執行SQL語句
Statement statement = DBService.getInstance().getConnection().createStatement();
// 要執行的SQL語句id和content是表review中的項。
String sql = "select * from login where name='Lovell' and password='123456'";
// 得到結果
ResultSet rs = statement.executeQuery(sql);
        if(rs.next()){
            System.out.println("Logon");
}else{
            System.out.println("Login Faild");
}
        rs.close();
}
}