JDBC连接Sqlserver

首先配置好环境这里直接给出链接java通过JDBC链接SQLServer2012

接着直接上代码

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Vector;

public class ConnectionPool {
private Vector<Connection> pool;
private int poolSize = 5;
final String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
final String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=xxx";
final String userName = "xxx"; //默认用户名
final String userPwd = "xxx"; //密码
private static ConnectionPool instance = null;
private ConnectionPool(){
init();
}
private void init(){
pool = new Vector<Connection>(poolSize);
addConnection();
}

public synchronized void release(Connection coon){
pool.add(coon);
}
public synchronized void closePool(){
for(int i = 0; i < pool.size(); i++) {
try {
((Connection)pool.get(i)).close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
pool.remove(i);
}
}
public static ConnectionPool getInstance(){
if(instance == null){
instance = new ConnectionPool();
}
return instance;
}
public synchronized Connection getConnection(){
if(pool.size() >0){
Connection conn = pool.get(0);
pool.remove(conn);
return conn;
}else{
addConnection();
Connection conn = pool.get(0);
pool.remove(conn);
return conn;
}
}
private void addConnection(){
Connection coon = null;
for(int i=0;i<poolSize;i++){
try {
Class.forName(driverName);
coon = java.sql.DriverManager.getConnection(dbURL, userName, userPwd);
pool.add(coon);
} catch (ClassNotFoundException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}