【Android解决方案】连接SQL Server_android连接sql

作者：AllinToyou | 2024-03-26 03:00:51

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android连接sql

案例说明

前一段时间要做一个用Android平板连接SQL的项目，在这种情况下，我就想到了两种方案：

1）Android Client + Webservice + SQL的方式来连接

2）Android Client + SQL

本人一直都在用第一种方案做的，都很坚持第一种方案，但由于客户的环境加上其他因素，不能用第一种方案来做，所以就用了第二种；

技术概要

由于SQL官方的驱动不能直接用于Android上运行，所以就在网上搜了一些资料，看到了JTDS驱动，这个是开源的，网址是： http://sourceforge.net/projects/jtds/files/

现在最新的版本是1.3.0,但这个版本不能在Android上用，因为1.3.0是支持Java7的，Android不支持Java7，所以我就选择了1.2.7的版本;

开发环境

Windows7 x64 专业版

Android4.0.2

Eclipse4.2+ADT 21+SDK 21

代码实现

以下是数据库连接和测试类DataBaseUtil.java，注意修改连接字符串


package com.example.androidsql;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
 
 
public class DataBaseUtil
{
 
	private static Connection getSQLConnection(String ip, String user, String pwd, String db)
	{
		Connection con = null;
		try
		{
			Class.forName("net.sourceforge.jtds.jdbc.Driver");
			con = DriverManager.getConnection("jdbc:jtds:sqlserver://" + ip + ":1433/" + db + ";charset=utf8", user, pwd);
		} catch (ClassNotFoundException e)
		{
			e.printStackTrace();
		} catch (SQLException e)
		{
			e.printStackTrace();
		}
		return con;
	}
 
	public static String testSQL()
	{
		String result = "字段1  -  字段2\n";
		try
		{
			Connection conn = getSQLConnection("xx.xx.xx.xx", "sa", "123", "DataBaseName");
			String sql = "select top 10 * from UserTable";
			Statement stmt = conn.createStatement();// 閸掓稑缂揝tatement
			ResultSet rs = stmt.executeQuery(sql);
			while (rs.next())
			{// <code>ResultSet</code>閺堬拷鍨甸幐鍥ф倻缁楊兛绔寸悰锟�
				String s1 = rs.getString("Name1");
				String s2 = rs.getString("Name2");
				result += s1 + "  -  " + s2 + "\n";
				System.out.println(s1 + "  -  " + s2);
			}
			rs.close();
			stmt.close();
			conn.close();
		} catch (SQLException e)
		{
			e.printStackTrace();
			result += "查询数据异常!" + e.getMessage();
		}
		return result;
	}
 
	public static void main(String[] args)
	{
		testSQL();
	}
 
}

MainActivity.java


package com.example.androidsql;
 
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
 
public class MainActivity extends Activity
{
	private View btnTest;
	private View btnClean;
	private TextView tvTestResult;
	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		btnTest=findViewById(R.id.btnTestSql);
		btnClean=findViewById(R.id.btnClean);
		tvTestResult = (TextView)findViewById(R.id.tvTestResult);
		
		btnTest.setOnClickListener(getClickEvent());
		btnClean.setOnClickListener(getClickEvent());
	}
 
	@Override
	public boolean onCreateOptionsMenu(Menu menu)
	{
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	 
	
	
	private View.OnClickListener getClickEvent(){
		return new View.OnClickListener()
		{			
			@Override
			public void onClick(View v)
			{
				tvTestResult.setText("...");
				if(v==btnTest){
					test();
					
				}				
			}
		};
	}
	private void test()
	{
		Runnable run = new Runnable()
		{			
			@Override
			public void run()
			{
				String ret = DataBaseUtil.testSQL();
				Message msg = new Message();
				msg.what=1001;
				Bundle data = new Bundle();
				data.putString("result", ret);	
				msg.setData(data);
				mHandler.sendMessage(msg);
			}
		};
		new Thread(run).start();
		 
	}
	
	Handler mHandler = new Handler(){
		public void handleMessage(android.os.Message msg) {
			switch (msg.what)
			{
				case 1001:
					String str = msg.getData().getString("result");
					tvTestResult.setText(str);
					break;
 
				default:
					break;
			}
		};
	};
 
}

activity_main.xml


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >
	<Button 
	    android:id="@+id/btnTestSql"
	    android:layout_width="wrap_content" 
	    android:layout_height="wrap_content"
	    android:text="@string/testSQL"/>
	<Button 
	    android:id="@+id/btnClean"
	    android:layout_width="wrap_content" 
	    android:layout_height="wrap_content"
	    android:layout_alignParentRight="true"
	    android:text="@string/clean"/>
    <TextView
        android:id="@+id/tvTestResult"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/btnTestSql"
        android:text="@string/hello_world" />
 
</RelativeLayout>

strings.xml


<?xml version="1.0" encoding="utf-8"?>
<resources>
 
    <string name="app_name">AndroidSQL</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>
	<string name="testSQL">测试SQL</string>
	<string name="clean">清除数据</string>
</resources>

Demo下载地址：

http://download.csdn.net/detail/yaoneng119/5309160

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