思路：先建立一个DBUtil类，管理所有的创建连接、关闭连接、提交事务、回滚事务、关闭Statement、关闭Resultset等操作。
然后编写一个Client类结合DBUtil类即可，思路非常简洁。
DBUtil类代码：
package custom;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
* 数据库工具类
* @author Administrator
*
*/
public class DBUtil {
/**
* 取得数据库连接
* @return
*/
public static Connection getConnection() {
Connection conn = null;
try {
//取得jdbc配置信息
String filePath=DBUtil.class.getClassLoader().getResource("").getPath()+"conf.properties";
String url=PropertiesDAO.getProperties(filePath, "url");
String userName=PropertiesDAO.getProperties(filePath, "userName");
String password=PropertiesDAO.getProperties(filePath, "password");
String driverName=PropertiesDAO.getProperties(filePath, "driverName");
Class.forName(driverName);
conn = DriverManager.getConnection(url, userName, password);
} catch (ClassNotFoundException e) {
//记录日志可以将类不能找记录进去，这样可以更准确的定位问题
//但是给用户不应该抛出类不能找到，应该抛出用户能够理解的错误
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
public static void close(PreparedStatement pstmt) {
if (pstmt != null) {
try {
pstmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close(Connection conn) {
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close(ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void commit(Connection conn) {
if (conn != null) {
try {
conn.commit();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void rollback(Connection conn) {
if (conn != null) {
try {
conn.rollback();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void setAutoCommit(Connection conn, boolean autoCommit) {
if (conn != null) {
try {
conn.setAutoCommit(autoCommit);
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close(Statement stmt) {
if (stmt != null) {
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
DBUtil.getConnection();
System.out.println("---------ok---------");
}
}
Client类的requestBegin方法：
public void requestBegin(SCESession mySession) {
// TODO Auto-generated method stub
super.requestBegin(mySession);
Connection conn=null;
PreparedStatement pre=null;
try {
conn=DBUtil.getConnection();
//begin transaction
DBUtil.setAutoCommit(conn, false);
//get mobile
IVariable mobileVar = mySession.getVariable(IProjectVariables.PROMPT_COLLECT_MOBILE);
String mobile=mobileVar.getComplexVariable().getField(IProjectVariables.PROMPT_COLLECT_MOBILE_FIELD_VALUE).getStringValue();
//get ready for the sql
String sql="insert into satisfaction(mobile) values(?)";
pre = conn.prepareStatement(sql);// 实例化预编译语句
pre.setString(1, mobile);
pre.executeUpdate();
DBUtil.commit(conn);
} catch (Exception e) {
e.printStackTrace();
//rollback
DBUtil.rollback(conn);
}finally{
DBUtil.close(pre);
DBUtil.close(conn);
}
}
以上，大功告成！
refurl:
http://www.cnblogs.com/liuxianan/archive/2012/08/05/2624300.html