通过 servletContext 得到 数据源，进而得到connection

package com.community.util;

import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.ServletContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DBOperation {
private PreparedStatement stsm;
private static Logger log = LoggerFactory.getLogger(DBOperation.class);
public void excuteUpdate(String sql,Object[]values,ServletContext sc)
{
try {
stsm = DBConnection.getConnection(sc).prepareStatement(sql);
if(values!=null && values.length>0)
{
for(int i=0 ; i<values.length ;i++)
{
stsm.setObject(i+1, values[i]);
}
}
stsm.executeUpdate();
} catch (SQLException e) {
log.error("数据更新错误！",e);
} finally {
DBConnection.closeConnection();
}
}

}

package com.community.util;

import java.sql.Connection;
import java.sql.SQLException;
import javax.servlet.ServletContext;
import org.logicalcobwebs.proxool.ProxoolDataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

public class DBConnection {
private static Connection conn;
private static Logger log = LoggerFactory.getLogger(DBConnection.class);

/**
* 获得数据库连接
*
* @return
*/
public static synchronized Connection getConnection(ServletContext sc) {
init(sc);
return conn;
}

/**
* 初始化数据库连接
*/
private static void init(ServletContext sc) {
try {
//PropUtils p = new PropUtils();
//p.loadFile("jdbc.properties");
ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(sc);
//new FileSystemXmlApplicationContext();
ProxoolDataSource prox = (ProxoolDataSource)ctx.getBean("dataSource");
// 获取连接
conn =prox.getConnection();
// Class.forName(p.getValue("db.driver"));
// conn =
// DriverManager.getConnection(p.getValue("db.url"),p.getValue("db.user"),p.getValue("db.password"));
} catch (SQLException e) {
log.error("数据库连接错误！", e);
}catch(Exception e){
log.error("数据库连接错误！", e);
}
}

/**
* 关闭数据库连接
*/
public static void closeConnection() {
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
log.error("数据库关闭错误！", e);
}
}
}
//	public static void main(String[] args) {
//		init();
//	}
}