dbutil.java

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package com.fxe.dcl1.util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DBUtil {

	protected Connection con=null;
	protected Statement stmt=null;
	protected PreparedStatement pstmt=null;
	protected ResultSet rs=null;
	/**
	 * 打开连接
	 */
	protected void openConn()
	{
	     con=DBConnection.getCon();
	}
	/**
	 * 关闭连接，释放资源
	 */
	protected void closeAll()
	{
		if(rs!=null)
		{
			try {
				rs.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		if(stmt!=null)
		{
			try {
				stmt.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		if(pstmt!=null)
		{
			try {
				pstmt.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		if(con!=null)
		{
			try {
				con.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}