基于java实现大学生求职就业网项目设计源码

package com.bwm.db; import java.sql.*; /** *class explain:Database connection *set up name: crazyadept *set up time: 11/22/2004 */ public class Conn { private static Connection con; private Statement stmt; private ResultSet rs; private static final String drivername = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; private static final String url = "jdbc:sqlserver://127.0.0.1:1433;DatabaseName=db_Job;user=sa;password=;"; /** *method explain: Get Connection DataBase *modify time: 12/20/2004 */ public static synchronized Connection getCon() throws Exception { try { Class.forName(drivername); con = DriverManager.getConnection(url); return con; } catch (SQLException e) { System.err.println(e.getMessage()); throw e; } } /** *output parameter: in order select in SQL *modify time: 12/20/2004 */ public Statement getStmtread() { try { con = getCon(); stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); return stmt; } catch (Exception e) { System.err.println(e.getMessage()); e.printStackTrace(); } return null; } /** *output parameter: Data *input parameter: SQL select sentence *modify time: 11/29/2004 */ public ResultSet getRs(String sql) { try { stmt = getStmtread(); rs = stmt.executeQuery(sql); return rs; } catch (Exception e) { System.err.println(e.getMessage()); e.printStackTrace(); } return null; } /** *output parameter: not in order select in str SQL *modify time: 11/29/2004 */ public Statement getStmt() { try { con = getCon(); stmt = con.createStatement(); return stmt; } catch (Exception e) { System.err.println(e.getMessage()); e.printStackTrace(); } return null; } /** *method explain: Close DataBase Connection *modify time: 11/29/2004 */ public synchronized void close() { try { if (rs != null) { rs.close(); rs = null; } } catch (Exception e) { System.err.println(e.getMessage()); e.printStackTrace(); } try { if (stmt != null) { stmt.close(); stmt = null; } } catch (Exception e) { System.err.println(e.getMessage()); e.printStackTrace(); } try { if (con != null) { con.close(); con = null; } } catch (Exception e) { System.err.println(e.getMessage()); e.printStackTrace(); } } }