示例代码:
package t; import java.net.URL; import java.net.URLClassLoader; import java.sql.Connection; import java.sql.DatabaseMetaData; import java.sql.Driver; import java.util.Properties; public class Test2 { public static void main(String[] args) throws Exception { String url = "jdbc:sqlserver://localhost:1433;DatabaseName=loushang"; String user = "sa"; String password = "loushang"; String driverClass = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; String driverJar = "file:/D:/Desktop/sqljdbc4.jar"; URL urls[] = new URL[] { new URL(driverJar)}; URLClassLoader loader = new URLClassLoader(urls); Class<?> clazz = loader.loadClass(driverClass); Driver driver = (Driver)clazz.newInstance(); Properties p = new Properties(); p.put("user", user); p.put("password", password); Connection con = driver.connect(url, p); DatabaseMetaData meta = con.getMetaData(); System.out.println("getDatabaseProductName()="+meta.getDatabaseProductName()); System.out.println("getDatabaseProductVersion()="+meta.getDatabaseProductVersion()); System.out.println("getDefaultTransactionIsolation()="+meta.getDefaultTransactionIsolation()); System.out.println("getDriverName()="+meta.getDriverName()); con.close(); } }
输出结果:
getDatabaseProductName()=Microsoft SQL Server getDatabaseProductVersion()=8.00.760 getDefaultTransactionIsolation()=2 getDriverName()=Microsoft SQL Server 2005 JDBC Driver
关于URLClassLoader:
java.net
类 URLClassLoader
java.lang.Object java.lang.ClassLoader java.security.SecureClassLoader java.net.URLClassLoader
public class URLClassLoader