mysql的java连接池，用openSTA测试50人并发访问一万次,没有出现问题，很好用

lyl801013

己写的一个mysql的连接池.....用openSTA测试50人并发访问一万次,没有出现问题....很好用.
package dbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.ArrayList;
public class DataBaseConnection {
private static int maxConnectNum = 20;
private java.sql.Connection conn[] = new Connection[maxConnectNum];
private static ArrayList connectPool = new ArrayList();
private static int flag = 0;
public DataBaseConnection() {
if (flag == 0) {
init();
}
}
private Connection getConnectionFromDatabase() {
Connection trueConn = null;
try {
//Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Class.forName("com.mysql.jdbc.Driver").newInstance();
String url = "jdbc:mysql://localhost:3306/ssk?user=root&password=dzjc&useUnicode=true&characterEncoding=GBK";
trueConn = DriverManager.getConnection(url);
} catch (Exception ex) {
System.out.println("数据连接出错了:" + ex.toString());
}
return trueConn;
}
//这里建立所有的连接;
private void init() {
for (int i = 0; i < maxConnectNum; i++) {
conn = getConnectionFromDatabase();
connectPool.add(i, conn);
}
flag = 1;
}
//从连接池中取得一个可用的连接
public Connection getConnection() {
Connection conn = null;
if (connectPool.size() == 0) {
try {
java.lang.Thread.sleep(1000);
getConnection();
} catch (InterruptedException ex) {
System.out.println("连接全部用光,这里sleep出错了.");
}
} else {
conn = (Connection) connectPool.remove(0);
}
return conn;
}
//提供给外部程序调用,不用的连接放回连接池当中...
public boolean release(Connection conn) {
return connectPool.add(conn);
}
public static void main(String[] args) {
}
}
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