测试连接oracle数据库耗时

maven项目

主程序:ConnOracle.java

package org.guangsoft.oracle;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import org.guangsoft.util.PropUtil;

public class ConnOracle {
    private static final String DRIVERCLASS = PropUtil.getProps().getProperty("DRIVERCLASS");  
    private static final String URL = PropUtil.getProps().getProperty("URL");  
    private static final String USERNAME = PropUtil.getProps().getProperty("USERNAME");  
    private static final String PASSWORD = PropUtil.getProps().getProperty("PASSWORD");  
    private static Connection conn = null;  
  
    public static void main(String[] args) {  
        System.out.println("####DRIVERCLASS is " + DRIVERCLASS);
        System.out.println("####URL is " + URL);
        System.out.println("####USERNAME is " + USERNAME);
        System.out.println("####PASSWORD is " + PASSWORD);
        try {  
            Class.forName(DRIVERCLASS);  
        } catch (ClassNotFoundException e) {
            System.out.println("####Class.forName failed!");
            e.printStackTrace();  
        }  
  
        try {  
            long startTime = System.currentTimeMillis();
            conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);  
            long endTime = System.currentTimeMillis();
            if (conn == null) {  
                System.out.println("conn is null 获取链接失败！");  
            } else {  
                System.out.println("conn --> " + conn);  
                System.out.println(conn.hashCode());
                System.out.println("获取连接耗时：" + (endTime - startTime) + " ms");
            }  
  
        } catch (SQLException e) {
            System.out.println("####DriverManager.getConnection failed!");
            e.printStackTrace();  
        } finally {  
            try {  
                conn.close();  
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
        }  
    }  
}  

PropUtil.java

package org.guangsoft.util;import java.io.InputStream;
import java.util.Properties;public class PropUtil {private static Properties props = null;static {readProperties("db.properties");}private static void readProperties(String fileName) {    try {    props = new Properties();InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);props.load(inputStream);inputStream.close();} catch (Exception e) {    e.printStackTrace();    }    } public static Properties getProps() {return props;}}

db.properties

 DRIVERCLASS=oracle.jdbc.driver.OracleDriver

URL=jdbc:oracle:thin:@localhost:1521:orcl

USERNAME=test

PASSWORD=test  

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>
    <groupId>org.guangsoft</groupId>
    <artifactId>oracle</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>
    <dependencies>
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc5</artifactId>
            <version>11.2</version>
        </dependency>
    </dependencies>
    <build>
        <sourceDirectory>src</sourceDirectory>
        <resources>
            <resource>
                <directory>src</directory>
                <excludes>
                    <exclude>**/*.java</exclude>
                </excludes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>