取得连接要10多秒:import java.sql.Connection;import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;public class Test {
public static Connection getConnection() {
Connection conn = null;
try {
DataSource ds = null;
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
ds = (DataSource) envCtx.lookup("jdbc/bus");
long start = System.currentTimeMillis();
conn = ds.getConnection();
long end = System.currentTimeMillis();
System.out.println(end-start);
} catch (Exception e) {
System.out.println(e.getMessage()); }
return conn; }}连接池配置文件:
<Context>
<Resource name="jdbc/bus" auth="Container"
type="javax.sql.DataSource" username="busapp"
password="boEt7w1" driverClassName="oracle.jdbc.driver.OracleDriver"
url="jdbc:oracle:thin:@130.91.100.66:1521:buspd" maxActive="50"
maxIdle="10" />
</Context>
import javax.naming.InitialContext;
import javax.sql.DataSource;public class Test {
public static Connection getConnection() {
Connection conn = null;
try {
DataSource ds = null;
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
ds = (DataSource) envCtx.lookup("jdbc/bus");
long start = System.currentTimeMillis();
conn = ds.getConnection();
long end = System.currentTimeMillis();
System.out.println(end-start);
} catch (Exception e) {
System.out.println(e.getMessage()); }
return conn; }}连接池配置文件:
<Context>
<Resource name="jdbc/bus" auth="Container"
type="javax.sql.DataSource" username="busapp"
password="boEt7w1" driverClassName="oracle.jdbc.driver.OracleDriver"
url="jdbc:oracle:thin:@130.91.100.66:1521:buspd" maxActive="50"
maxIdle="10" />
</Context>
public final class DbcpUtil { private static DataSource myDataSource = null; /**
* 不允许外部创建该对象,保证安全性
*/
private DbcpUtil() {
} /*
* 根据配置文件初始化数据源
*/
static {
try {
Properties prop = new Properties();
InputStream is = DbcpUtil.class.getClassLoader()
.getResourceAsStream("dbcpconfig.properties");
prop.load(is);
myDataSource = BasicDataSourceFactory.createDataSource(prop);
} catch (Exception e) {
throw new ExceptionInInitializerError(e);
}
} /**
* 得到数据源
*
* @return
*/
public static DataSource getDataSource() {
return myDataSource;
} /**
* 由数据源获得一个连接
*
* @return
* @throws SQLException
*/
public static Connection getConnection() throws SQLException {
return myDataSource.getConnection();
} /**
* 释放连接
*
* @param rs
* @param st
* @param conn
*/
public static void free(ResultSet rs, Statement st, Connection conn) {
try {
if (rs != null)
rs.close();
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (st != null)
st.close();
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (conn != null)
try {
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
url=jdbc:sqlserver://localhost;databaseName=easyc
username=sa
password=pass#<!-- 初始化连接 -->
initialSize=10#最大连接数量
maxActive=50#<!-- 最大空闲连接 -->
maxIdle=20#<!-- 最小空闲连接 -->
minIdle=5#<!-- 超时等待时间以毫秒为单位 6000毫秒/1000等于60秒 -->
maxWait=60000
#JDBC驱动建立连接时附带的连接属性属性的格式必须为这样:[属性名=property;]
#注意:"user" 与 "password" 两个属性会被明确地传递,因此这里不需要包含他们。
connectionProperties=useUnicode=true;characterEncoding=gbk#指定由连接池所创建的连接的自动提交(auto-commit)状态。
defaultAutoCommit=true#driver default 指定由连接池所创建的连接的只读(read-only)状态。
#如果没有设置该值,则“setReadOnly”方法将不被调用。(某些驱动并不支持只读模式,如:Informix)
defaultReadOnly=#driver default 指定由连接池所创建的连接的事务级别(TransactionIsolation)。
#可用值为下列之一:(详情可见javadoc。)NONE,READ_UNCOMMITTED, READ_COMMITTED, REPEATABLE_READ, SERIALIZABLE
defaultTransactionIsolation=READ_UNCOMMITTED