AndroidStudio通过jtds远程访问SQLserver数据库
我的是腾讯云远程连接sqlserver，本地的话应该也一样。
一、测试开发环境
windows10 + androidstudio3.3.2 + SqlServer2008R2
二、下载SQL驱动JTDS
1 到这里
https://sourceforge.net/projects/jtds/files/jtds/
各种版本都有
下载 jtds-1.3.1-dist.zip
现在的1.3.1已经可以用了，网上说的大部分都是以前的1.2.7版本的。
放在libs下。（博主用的1.2.7）
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1 SQL ERVER 允许远程访问
开始–SQL2008–配置工具–SQL Server配置管理器–SQL Server网络配置–SQLexpress的协议–TCP/IP
状态 要改为 已启用
-
2.可能有的还需要配置端口号1433，不需要配置的忽略这一步。
-
具体可看
https://jingyan.baidu.com/article/6c67b1d6ca06f02787bb1ed1.html -
3 建立数据库和表
数据库 BOOK
建立表 管理员，字段 id，name，pwd，内容如下：id name pwd
1001 zhangsan 1234
1002 lisi 1234
1003 wangwu 1234
1004 jiujiu 4567
三、用JTDS连接SQLServer数据库相关代码
1、创建数据库连接类 DBUtil.java
package com.example.linkdatabaseapplication;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
* @author Admin
* @version $Rev$
* @des ${TODO}
* @updateAuthor $Author$
* @updateDes ${TODO}
*/
public class DBUtil {
private static Connection getSQLConnection(String ip, String user,String pwd,String db){
Connection con = null;
try {
Class.forName("net.sourceforge.jtds.jdbc.Driver");
//DriverManager.getConnection("jdbc:jtds:sqlserver://" + ip + ":1433/" + db + ";charset=utf8", user, pwd);
con = DriverManager.getConnection("jdbc:jtds:sqlserver://" + ip + ":1433/" + db , user, pwd);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return con;
}
public static String QuerySQL(){
String result ="";
try {
Connection conn = getSQLConnection("xxx.xxx.xxx.xxx", "sa", "1234", "book");
String sql = "select top 10 * from 管理员";
Statement stmt = conn.createStatement();//
ResultSet rs = stmt.executeQuery(sql);
while (rs.next())
{
String s1 = rs.getString("name");
String s2 = rs.getString("pwd");
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)
{
QuerySQL();
}
}
2、创建一个布局文件，activity_main.xml
"1.0" encoding="utf-8"?>
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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">
Strings.xml
"app_name">LinkDatabaseApplication
"action_settings">Settings
"hello_world">Hello world!
"testSQL">测试SQL
"clean">清除数据
dimens.xml
"1.0" encoding="utf-8"?>
"activity_vertical_margin">50dp
"activity_horizontal_margin">30dp
3、具体代码调用 MainActivity.java
package com.example.linkdatabaseapplication;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private View mBtnTest;
private View btnClean;
private TextView tvTestResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mBtnTest = findViewById(R.id.btnTestSql);
btnClean = findViewById(R.id.btnClean);
tvTestResult = findViewById(R.id.tvTestResult);
mBtnTest.setOnClickListener(getClickEvent());
btnClean.setOnClickListener(getClickEvent());
}
private View.OnClickListener getClickEvent() {
return new View.OnClickListener() {
@Override
public void onClick(View view) {
tvTestResult.setText("...");
if (view == mBtnTest) {
test();
}
}
};
}
private void test() {
Runnable run = new Runnable() {
@Override
public void run() {
String ret = DBUtil.QuerySQL();
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;
}
};
};
}
4、在AndroidManifest.xml 加上权限
android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
android:name="android.permission.INTERNET" />
android:name="android.permission.ACCESS_NETWORK_STATE" />
##运行结果：
