dbcp的简单配置

1. 两个jar包

commons-dbcp-1.4.jar

commons-pool-1.5.5.jar

2. 在java代码中直接设置dbcp数据源连接的方式(此处连接mysql数据库)：

public class Dbcputils {

private static BasicDataSource dataSource = null;

public static Connection getConnection(){

dataSource = new BasicDataSource();

//四个必要属性

dataSource.setDriverClassName("com.mysql.jdbc.Driver");

dataSource.setUrl("jdbc:mysql://localhost:3306/test");

dataSource.setUsername("root");

dataSource.setPassword("root");

//可选属性

dataSource.setInitialSize(5); //Sets the initial size of the connection pool.

dataSource.setMaxActive(50); // Sets the maximum number of active connections that can be allocated at the same time.

dataSource.setMaxIdle(5); //Sets the maximum number of connections that can remain idle in the pool.

dataSource.setMaxWait(1000*5);//Sets the maxWait property.

Connection conn = null;

try {

conn = dataSource.getConnection();

if(conn!=null){

System.out.println("数据库连接成功！");

}

} catch (SQLException e) {

e.printStackTrace();

return null;

}

return conn;

}

3. 使用properties作为配置文件(建议使用)

public static Connection getConnection2(){

Properties properties = new Properties();

Connection conn = null;

InputStream is = Dbcputils.class.getClassLoader()

.getResourceAsStream("dbcp.properties");

try {

properties.load(is);

DataSource dataSource = BasicDataSourceFactory.createDataSource(properties);

conn = dataSource.getConnection();

if(conn!=null){

System.out.println("数据库连接成功");

}

} catch (Exception e) {

e.printStackTrace();

return null;

}

return conn;

}

dbcp.properties文件如下：

driverClassName=com.mysql.jdbc.Driver

url=jdbc\:mysql\://localhost\:3306/test

username=root

password=root

initialSize=5

maxActive=50

maxIdle=5

maxWait=5000

注意：

文件中的属性名称(driverClassName)不可以自己随意取，而是根据

BasicDataSource中的setXXX方法得知相应的名称，将首字母改为小写。