Java/php/C#连接sqlite总结

1.Java jdbc连接sqlite：

1） 下载sqlite jdbc驱动http://www.xerial.org/maven/repository/artifact/org/xerial/sqlite-jdbc/

2）将下载的驱动加入eclipse项目的built path中

3）示例代码：

package com.hedalixin; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.Statement; public class test { /** * @param args */ public static void main(String[] args) throws Exception { // TODO Auto-generated method stub Class.forName("org.sqlite.JDBC"); Connection conn = DriverManager.getConnection("jdbc:sqlite:test.db"); Statement stat = conn.createStatement(); stat.executeUpdate("drop table if exists people;"); stat.executeUpdate("create table people (name, occupation);"); PreparedStatement prep = conn .prepareStatement("insert into people values (?, ?);"); prep.setString(1, "Gandhi"); prep.setString(2, "politics"); prep.addBatch(); prep.setString(1, "Turing"); prep.setString(2, "computers"); prep.addBatch(); prep.setString(1, "Wittgenstein"); prep.setString(2, "smartypants"); prep.addBatch(); conn.setAutoCommit(false); prep.executeBatch(); conn.setAutoCommit(true); ResultSet rs = stat.executeQuery("select * from people;"); while (rs.next()) { System.out.println("name = " + rs.getString("name")); System.out.println("job = " + rs.getString("occupation")); } rs.close(); conn.close(); } }

2. PHP使用PDO连接sqlite

待续

3. C#连接sqlite

3.1 使用SQLITE.NET

SQLite.NET也是一个数据访问组件，其中的System.Data.SQLite 就好像是.NET自带的System.Data.SqlClient一样。里面包含了connection、command等数据访问的常用对象，只是他们前面都有一个前缀sqlite。

1）下载System.Data.SQLite，下载地址http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki

2) 通过Add References引用SQLite ADO .NET安装目录的bin目录下的System.Data.SQLite.DLL。

3)创建表、读取数据等和Access或MS SQL没多大区别
//创建一个数据库文件 string datasource="h:/test.db"; System.Data.SQLite.SQLiteConnection.CreateFile(datasource); //连接数据库 System.Data.SQLite.SQLiteConnection conn = new System.Data.SQLite.SQLiteConnection(); System.Data.SQLite.SQLiteConnectionStringBuilder connstr = new System.Data.SQLite.SQLiteConnectionStringBuilder(); connstr.DataSource = datasource; connstr.Password = "admin";//设置密码，SQLite ADO.NET实现了数据库密码保护 conn.ConnectionString = connstr.ToString(); conn.Open(); //创建表 System.Data.SQLite.SQLiteCommand cmd = new System.Data.SQLite.SQLiteCommand(); string sql = "CREATE TABLE test(username varchar(20),password varchar(20))"; cmd.CommandText=sql; cmd.Connection=conn; cmd.ExecuteNonQuery(); //插入数据 sql = "INSERT INTO test VALUES('ekinglong','mypassword')"; cmd.CommandText = sql; cmd.ExecuteNonQuery(); //取出数据 sql = "SELECT * FROM test"; cmd.CommandText = sql; System.Data.SQLite.SQLiteDataReader reader = cmd.ExecuteReader(); StringBuilder sb = new StringBuilder(); while (reader.Read()) { sb.Append("username:").Append(reader.GetString(0)).Append("\n") .Append("password:").Append(reader.GetString(1)); } MessageBox.Show(sb.ToString());
3.2使用原生态的ADO.NET访问SQLite

using (DbConnection conn = new SQLiteConnection( System.Configuration.ConfigurationManager.ConnectionStrings["sqlite"].ConnectionString)) { conn.Open(); DbCommand comm = conn.CreateCommand(); comm.CommandText = "select * from customer"; comm.CommandType = CommandType.Text; using (IDataReader reader = comm.ExecuteReader()) { while (reader.Read()) { Response.Write(reader[0]); } } }

SQLite.NET数据库连接字符串ConnectionString格式：

Basic（基本的）
Data Source=filename;Version=3;
Using UTF16（使用UTF16编码）
Data Source=filename;Version=3;UseUTF16Encoding=True;
With password（带密码的）
Data Source=filename;Version=3;Password=myPassword;
Using the pre 3.3x database format（使用3.3x前数据库格式）
Data Source=filename;Version=3;Legacy Format=True;
Read only connection（只读连接）
Data Source=filename;Version=3;Read Only=True;
With connection pooling（设置连接池）
Data Source=filename;Version=3;Pooling=False;Max Pool Size=100;
Using DateTime.Ticks as datetime format（）
Data Source=filename;Version=3;DateTimeFormat=Ticks;
The default value is ISO8601 which activates the use of the ISO8601 datetime format
Store GUID as text（把Guid作为文本存储，默认是Binary）
Data Source=filename;Version=3;BinaryGUID=False;
如果把Guid作为文本存储需要更多的存储空间
Specify cache size（指定Cache大小）
Data Source=filename;Version=3;Cache Size=2000;
Cache Size 单位是字节
Specify page size（指定页大小）
Data Source=filename;Version=3;Page Size=1024;
Page Size 单位是字节
Disable enlistment in distributed transactions
Data Source=filename;Version=3;Enlist=N;
Disable create database behaviour（禁用创建数据库行为）
Data Source=filename;Version=3;FailIfMissing=True;
默认情况下，如果数据库文件不存在，会自动创建一个新的，使用这个参数，将不会创建，而是抛出异常信息
Limit the size of database（限制数据库大小）
Data Source=filename;Version=3;Max Page Count=5000;
The Max Page Count is measured in pages. This parameter limits the maximum number of pages of the database.
Disable the Journal File （禁用日志回滚）
Data Source=filename;Version=3;Journal Mode=Off;
This one disables the rollback journal entirely.
Persist the Journal File（持久）
Data Source=filename;Version=3;Journal Mode=Persist;
This one blanks and leaves the journal file on disk after a commit. Default behaviour is to delete the Journal File after each commit.
Controling file flushing
Data Source=filename;Version=3;Synchronous=Full;
Full specifies a full flush to take action after each write. Normal is the default value. Off means that the underlying OS flushes I/O's.