android开发 MyEclipse下测试连接MySQL数据库

1、首先要加载MySQL驱动包。

步骤:右击项目找到build path->configure build path->libraries——>add External JARs添加驱动包

 

2、写测试类:TestCon.java

(在此之前,首先必须

  1.在自己的电脑上Mysql下确定账户是"root",密码是"123456";

  2.进入账户,创建数据库cui;

  3.在数据库cui下面,创建表test1 包含_id(int 类型自动增加) username(String 类型)、password(String 类型);

  4.在表中插入数据,以便显示

 1 package com.test.an;
 2 
 3 import java.sql.Connection;
 4 import java.sql.DriverManager;
 5 import java.sql.PreparedStatement;
 6 import java.sql.ResultSet;
 7 import java.sql.SQLException;
 8 
 9 
10 public class TestCon1{
11     public static void main(String[] args) 
12     {
13         Connection con = null;
14         String sql;
15         PreparedStatement pre;
16         ResultSet rs;
17         
18         try {
19             String driver="com.mysql.jdbc.Driver";
20             Class.forName(driver);
21             
22             String url="jdbc:mysql://localhost:3306/cui?useUnicode=true&characterEncoding=latin1";//utf-8也行
23             con = DriverManager.getConnection(url, "root", "123456");
24             
25             sql = "select _id,username,password from test1" ;
26             pre = con.prepareStatement(sql);
27             
28             rs = pre.executeQuery(); 
29             while(rs.next()){
30                 int id = rs.getInt(1);
31                 String username = rs.getString(2);
32                 String password = rs.getString(3);
33                 
34                 System.out.println("id="+id+";username="+username+";password="+password);
35             }
36             con.close();
37         } catch (SQLException e) {
38             e.printStackTrace();
39         } catch (ClassNotFoundException e) {
40             e.printStackTrace();
41         }
42         
43     }
44 
45 }


  用力测试运行结果:

  id=1;username=ccc;password=123456
  id=2;username=xxx;password=654321
  id=3;username=ddd;password=123456
  id=4;username=ddf÷;password=yyt
  id=5;username=cuixiaodong;password=cxd
  id=6;username=vv;password=cxd

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