连接数据测试代码

package com.foen.cloud.utils;

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

public class DB_Conn{
//JDBC驱动程序名
private static String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
//数据库名称
private static String dateBaseName = "##";
//用户名
private static String username = "###";
//密码
private static String password = "##";
private static String url="jdbc:sqlserver://###;databaseName="+dateBaseName;
private static Connection conn;
private static Statement sm;

public static void main(String[] args) throws Exception {
connectDB();
closeDB();

}
//建立连接
public static void connectDB() {
try {
try {
Class.forName(driverName).newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
conn = DriverManager.getConnection(url,username,password);
sm = conn.createStatement();
System.out.println("数据库连接成功！"+sm);
} catch (SQLException e) {
e.printStackTrace();
System.out.println("数据库连接失败！");
}
}
//释放连接
public static void closeDB(){
try{
if(sm != null){
sm.close();
}
}catch(SQLException e){
System.out.println("关闭Statement失败！");
}
try{
if(conn != null){
conn.close();
}
}catch(SQLException e){
System.out.println("关闭Connection失败！");
}
}
public Statement getStatement() {
return sm;
}
public void setStatement(Statement sm) {
this.sm = sm;
}
}