java对sqlite数据库的操做

sqlite数据库放在java工程的“根目录”下(直接复制进项目里)。

须要sqlitejdbc.jar,sqljdbc4.jar支持。

1.链接sqlite数据库

package sqliteDataBase;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class sqlDbConnection {
	public sqlDbConnection() throws ClassNotFoundException {
		Class.forName("org.sqlite.JDBC");
	}

	public Connection getConnection() throws SQLException {
		Connection conn = DriverManager.getConnection("jdbc:sqlite:a.db");
		return conn;
	}
}

2.操做sqlite数据库

package sqliteDataBase;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;

import entity.Entity;

public class sqlDbDao {
	sqlDbConnection sqlConnection = null;
	Connection conn = null;
	ResultSet rs = null;
	Statement stat = null;

	public sqlDbDao() throws ClassNotFoundException {
		sqlConnection = new sqlDbConnection();
	}

	// 从sqlite中读取数据
	public ArrayList<Entity> getsqlDbMessage() {
		ArrayList<Entity> list = new ArrayList<Entity>();
		try {
			conn = sqlConnection.getConnection();
			stat = conn.createStatement();
			rs = stat.executeQuery("select txtp from te_user where sheetid= '6D544447-42A9-4AAB-B1D7-97D663ECE76D'");
			while (rs.next()) {
				rs.getInt(0);
//				Entity entity = new Entity();
//				entity.id = rs.getString("id");
//				entity.image = rs.getString("image");
//				list.add(entity);
			}
			if (rs != null)
				rs.close();
			if (stat != null)
				stat.close();
			System.err.println("从sqlite中读取成功");
		} catch (SQLException e) {
			System.err.println("从sqlite中读取失败");
			e.printStackTrace();
		} finally {
			if (conn != null)
				try {
					conn.close();
				} catch (SQLException e) {
					System.err.println("sqlite中的链接抛异常");
					e.printStackTrace();
				}
		}
		return list;
	}

	// 数据插入到sqlite
	public void addSqliteDb(Entity entity) {
		try {
			conn = sqlConnection.getConnection();
			stat = conn.createStatement();
			PreparedStatement prep = conn.prepareStatement("insert into image values (?, ?);");

			prep.setString(1, "3");
			prep.setString(2, entity.image);
			prep.addBatch();

			conn.setAutoCommit(false);
			prep.executeBatch();
			conn.setAutoCommit(true);
			System.err.println("数据插入到sqlite成功");
			if (stat != null)
				stat.close();
		} catch (SQLException e) {
			System.err.println("数据插入到sqlite失败");
			e.printStackTrace();
		} finally {
			if (conn != null)
				try {
					conn.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
		}
	}
}