常用JavaBean:JdbcBean codes:Java通过JDBC 连接 Mysql 数据库

package bean;
import java.sql.*;
import com.mysql.jdbc.PreparedStatement;
public class JdbcBean {
     public static Connection getConn()
     {

	     Connection conn = null;
		try {
			 Class.forName("com.mysql.jdbc.Driver");
			 conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/bbs?autoReconnect=true&useSSL=false","root","DZL123..");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	     return conn;
     }
     public static Statement getStmt(Connection conn)
     {
    	 Statement stmt = null;
		 try {
			stmt = conn.createStatement();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	 return stmt;
     }
     public static ResultSet getResu(Statement stmt , String sql)
     {
    	 ResultSet rs = null;
	     try {
			rs = stmt.executeQuery(sql);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	 return rs;
     }
     public static PreparedStatement getPStm(Connection conn , String sql)
     {
    	 PreparedStatement pstm = null;
    	 try {
			pstm = (PreparedStatement)conn.prepareStatement(sql);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	 return pstm;
     }
     public static void close(Connection conn)
     {
    	 if(conn!=null)
    	 {
    		 try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    	 }
     }
     public static void close(Statement stmt)
     {
    	 if(stmt!=null)
    	 {
    		 try {
				stmt.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    	 }
     }
     public static void close(ResultSet rs)
     {
    	 if(rs!=null)
    	 {
    		 try {
				rs.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    	 }
     }
}