在Java下连接SQLite数据库

在Java下连接SQLite数据库

一、下载SQLite数据库的JDBC：http://www.zentus.com/sqlitejdbc/

二、将下载到的包解压后得到jar包放到%J***A_HOME%\lib下，并且将其添加到ClassPath系统环境变量中。一定要保证在类路径ClassPath中有该jar包，并且保证在J***A库路径J***A Library Path中有本地库Native Library（\workspace\"Web应用"\WebRoot\WEB-INF\lib\下最好也要加入该jar包）。"SQLite.JDBCDriver"作为JDBC的驱动程序类名。连接JDBC的URL格式为jdbc:sqlite:/path。这里的path为指定到SQLite数据库文件的路径，例如：

jdbc:sqlite://dirA/dirB/dbfile

jdbc:sqlite://DRIVE:/dirA/dirB/dbfile

jdbc:sqlite://COMPUTERNAME/shareA/dirB/dbfile

三、下面是使用SQLite的两段代码以供参考：

代码段1：

1 import java.sql.*;

2 import org.sqlite.JDBC;

3

4 public class SQLiteTest {

5 public static void main(String[] args) {

6 try {

7 // The SQLite (3.3.8) Database File

8 // This database has one table (pmp_countries) with 3 columns (country_id, country_code, country_name)

9 // It has like 237 records of all the countries I could think of.

10 String fileName = "c:/pmp.db";

11 // Driver to Use

12 // http://www.zentus.com/sqlitejdbc/index.html
13 Class.forName("org.sqlite.JDBC");

14 // Create Connection Object to SQLite Database

15 // If you want to only create a database in memory, exclude the +fileName

16 Connection conn = DriverManager.getConnection("jdbc:sqlite:"+fileName);

17 // Create a Statement object for the database connection, dunno what this stuff does though.

18 Statement stmt = conn.createStatement();

19 // Create a result set object for the statement

20 ResultSet rs = stmt.executeQuery("SELECT * FROM pmp_countries ORDER BY country_name ASC");

21 // Iterate the result set, printing each column

22 // if the column was an int, we could do rs.getInt(column name here) as well, etc.

23 while (rs.next()) {

24 String id = rs.getString("country_id"); // Column 1

25 String code = rs.getString("country_code"); // Column 2

26 String name = rs.getString("country_name"); // Column 3

27 System.out.println("ID: "+id+" Code: "+code+" Name: "+name);

28

29 }

30 // Close the connection

31 conn.close();

32 }

33 catch (Exception e) {

34 // Print some generic debug info

35 System.out.println(e.getMessage());

36 System.out.println(e.toString());

37 }

38 }

39 }

代码段2：

1 import java.sql.*;

2 import org.sqlite.JDBC;

3 /**

4 * 这是个非常简单的SQLite的Java程序,

5 * 程序中创建数据库、创建表、然后插入数据，

6 * 最后读出数据显示出来

7 * @author zieckey (http://zieckey.cublog.cn)

8 */

9 public class TestSQLite{

10 public static void main(String[] args){

11 try{

12 //连接SQLite的JDBC

13 Class.forName("org.sqlite.JDBC");

14 //建立一个数据库名zieckey.db的连接，如果不存在就在当前目录下创建之

15 Connection conn = DriverManager.getConnection("jdbc:sqlite:zieckey.db");

16 Statement stat = conn.createStatement();

17

18 stat.executeUpdate( "create table tbl1(name varchar(20), salary int);" );//创建一个表，两列

19 stat.executeUpdate( "insert into tbl1 values('ZhangSan',8000);" ); //插入数据

20 stat.executeUpdate( "insert into tbl1 values('LiSi',7800);" );

21 stat.executeUpdate( "insert into tbl1 values('WangWu',5800);" );

22 stat.executeUpdate( "insert into tbl1 values('ZhaoLiu',9100);" );

23

24 ResultSet rs = stat.executeQuery("select * from tbl1;"); //查询数据

25

26 while (rs.next()) { //将查询到的数据打印出来

27 System.out.print("name = " + rs.getString("name") + " "); //列属性一

28 System.out.println("salary = " + rs.getString("salary")); //列属性二

29 }

30 rs.close();

31 conn.close(); //结束数据库的连接

32 }

33 catch( Exception e )

34 {

35 e.printStackTrace ( );

36 }

37 }

38 }