maven項目

主程序:ConnOracle.java

1 package org.guangsoft.oracle; 2 3 import java.sql.Connection; 4 import java.sql.DriverManager; 5 import java.sql.SQLException; 6 7 import org.guangsoft.util.PropUtil; 8 9 public class ConnOracle { 10 private static final String DRIVERCLASS = PropUtil.getProps().getProperty("DRIVERCLASS"); 11 private static final String URL = PropUtil.getProps().getProperty("URL"); 12 private static final String USERNAME = PropUtil.getProps().getProperty("USERNAME"); 13 private static final String PASSWORD = PropUtil.getProps().getProperty("PASSWORD"); 14 private static Connection conn = null; 15 16 public static void main(String[] args) { 17 System.out.println("####DRIVERCLASS is " + DRIVERCLASS); 18 System.out.println("####URL is " + URL); 19 System.out.println("####USERNAME is " + USERNAME); 20 System.out.println("####PASSWORD is " + PASSWORD); 21 try { 22 Class.forName(DRIVERCLASS); 23 } catch (ClassNotFoundException e) { 24 System.out.println("####Class.forName failed!"); 25 e.printStackTrace(); 26 } 27 28 try { 29 long startTime = System.currentTimeMillis(); 30 conn = DriverManager.getConnection(URL, USERNAME, PASSWORD); 31 long endTime = System.currentTimeMillis(); 32 if (conn == null) { 33 System.out.println("conn is null 獲取鏈接失敗！"); 34 } else { 35 System.out.println("conn --> " + conn); 36 System.out.println(conn.hashCode()); 37 System.out.println("獲取連接耗時：" + (endTime - startTime) + " ms"); 38 } 39 40 } catch (SQLException e) { 41 System.out.println("####DriverManager.getConnection failed!"); 42 e.printStackTrace(); 43 } finally { 44 try { 45 conn.close(); 46 } catch (Exception e) { 47 e.printStackTrace(); 48 } 49 } 50 } 51 }

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

1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>org.guangsoft</groupId> 5 <artifactId>oracle</artifactId> 6 <version>1.0</version> 7 <packaging>jar</packaging> 8 <dependencies> 9 <dependency> 10 <groupId>com.oracle</groupId> 11 <artifactId>ojdbc5</artifactId> 12 <version>11.2</version> 13 </dependency> 14 </dependencies> 15 <build> 16 <sourceDirectory>src</sourceDirectory> 17 <resources> 18 <resource> 19 <directory>src</directory> 20 <excludes> 21 <exclude>**/*.java</exclude> 22 </excludes> 23 </resource> 24 </resources> 25 <plugins> 26 <plugin> 27 <artifactId>maven-compiler-plugin</artifactId> 28 <version>2.3.2</version> 29 <configuration> 30 <source>1.5</source> 31 <target>1.5</target> 32 </configuration> 33 </plugin> 34 </plugins> 35 </build> 36 </project>

?

轉載于:https://www.cnblogs.com/guanghe/p/9067982.html

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