MySQL操作类（本人自己写的）

 1 package com.test;
 2 import java.sql.Connection;
 3 import java.sql.DriverManager;
 4 import java.sql.PreparedStatement;
 5 import java.sql.ResultSet;
 6 import java.util.Vector;
 7 public class DBUtil {
 8     
 9     //定义连接数据库需要的
10     Connection ct=null;
11     PreparedStatement pS=null;
12     ResultSet rS=null;
13     private static String url = "jdbc:mysql://"+DBSomeType.MYSQLURL+":3306/weixin?characterEncoding=UTF-8&autoReconnect=true";
14     private static String driverName = "com.mysql.jdbc.Driver";
15     
16     /**
17      *  数据库查询，本操作查询完需手动关闭连接
18      * @param sql
19      * @param params
20      * @return 查询结果ResultSet
21      */
22     public ResultSet getSlect(String sql,Object ...params){
23         Vector rowDate=new Vector();
24         Vector columnDate =new Vector();
25         try {
26             ct = connectWithDB();
27             pS=ct.prepareStatement(sql);
28             for(int i = 0;i < params.length;i++){
29                 pS.setObject(i+1, params[i]);
30             }
31             rS=pS.executeQuery();
32         } catch (Exception e) {
33             // TODO: handle exception
34         }finally{
35             return rS;
36         }
37     }
38     
39     /************修改数据库操作*********************/
40     public int update(String sql,Object ...params){
41         int executeUpdate_int = 0;
42         try {
43             ct = connectWithDB();
44             pS=ct.prepareStatement(sql);
45             for(int i = 0;i < params.length;i++){
46                 pS.setObject(i+1, params[i]);
47             }
48             //执行操作
49             executeUpdate_int = pS.executeUpdate();
50             System.out.println("executeUpdate_int = "+executeUpdate_int);
51         } catch (Exception e) {
52             // TODO: handle exception
53         }finally{
54             shutDownDB();
55             return executeUpdate_int;
56         }
57     }
58     
59     /************连接数据库*********************/
60     private Connection connectWithDB(){
61         Connection connection = null;
62         try {
63             Class.forName(driverName);
64             connection= DriverManager.getConnection(url, DBSomeType.ROOTUSERNAME, DBSomeType.ROOTPASSWORD);
65         } catch (Exception e) {
66             // TODO: handle exception
67         }
68         return connection;
69     }
70     
71     /************关闭数据库的相关连接*********************/
72     public void shutDownDB(){
73         try
74         {
75             if(rS!=null) rS.close();
76             if(pS!=null) pS.close();
77             if(ct!=null) ct.close();
78         } catch (Exception e2)
79         {
80             e2.printStackTrace();
81             // TODO: handle exception
82         }
83     }
84     
85 }