环境InterlliJ2016.3 MySQL5.7.12
gradle依赖库:
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'
}
配置文件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;
/**
* 数据库服务
* 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";
// 数据库连接数
private short db_max_conn = 0;
// 数据库服务器addr
private String db_url = null;
// 数据库连接端口
private short db_port = 0;
// 数据库名称
private String db_name = null;
// 数据库登录用户名
private String db_username = null;
// 数据库登录密码
private String db_password = null;
// 数据库连接
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("配置的数据库ip地址错误!");
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);
// // 也可以这样写
// 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");
// // 设置连接超时为8小时
// 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用来执行SQL语句
Statement statement = DBService.getInstance().getConnection().createStatement();
// 要执行的SQL语句id和content是表review中的项。
String sql = "select * from login where name='Lovell' and password='123456'";
// 得到结果
ResultSet rs = statement.executeQuery(sql);
if(rs.next()){
System.out.println("Logon");
}else{
System.out.println("Login Faild");
}
rs.close();
}
}
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作者:langzi7758521
来源:CSDN
原文:https://blog.csdn.net/langzi7758521/article/details/51766754