Android Studio无法连接到Azure SQL Server中的数据库 [英] Android studio can't connect to database in Azure sql server
问题描述
我正在使用android studio开发应用程序,并使用Azure Sql Server托管我的数据库.问题是我能够连接到SQL Server上的数据库,但是在数据库中找不到对象错误.
I am using android studio to develop an application and using Azure Sql Server to host my database. The problem is I was able to connect to my database on SQL server but it has an error of Object not found in my database.
我发现它可能正在连接到我的主数据库,而不是我希望它连接的数据库.有解决问题的办法吗?
I found out that it might be connecting to my master database instead of the database I want it to connect to. Is there any solution to solve the problem?
package com.example.lenovo.testing1;
import android.annotation.SuppressLint;
import android.os.StrictMode;
import android.util.Log;
import java.sql.*;
public class ConnectionClass {
String hostName = "haozailai.database.windows.net";
String dbName = "haozailai";
String user = "username";
String password = "password";
@SuppressLint("NewApi")
public Connection CONN() {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
String ConnURL;
Connection conn = null;
try {
Class.forName("net.sourceforge.jtds.jdbc.Driver");
String url = String.format("jdbc:jtds:sqlserver://haozailai.database.windows.net:1433;database=haozailai;user=username;password=password;encrypt=true;trustServerCertificate=false;hostNameInCertificate=*.database.windows.net;loginTimeout=30;");
conn = DriverManager.getConnection(url);
}catch (SQLException se)
{
Log.e("error here 1 : ", se.getMessage());
}
catch (ClassNotFoundException e)
{
Log.e("error here 2 : ", e.getMessage());
}
catch (Exception e)
{
Log.e("error here 3 : ", e.getMessage());
}
return conn;
}
}
推荐答案
我尝试通过java jdbc连接我的sqlserver,但没有重现您的问题.
I tried to connect my sqlserver via java jdbc and did not reproduce your issue.
我可以成功连接到我的应用程序数据库.
I can connect to my application db successfully.
我的测试代码:
My test code:
import java.sql.*;
public class Test {
public static final String url = "jdbc:sqlserver://***.database.windows.net:1433;database=***;user=***password=***;encrypt=true;trustServerCertificate=false;hostNameInCertificate=*.database.windows.net;loginTimeout=30;";
public static final String name = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
public static Connection conn = null;
public static PreparedStatement pst = null;
public static Statement stmt = null;
public static ResultSet rs = null;
public static void main(String[] args) {
try {
String SQL = "select * from dbo.Student";
Class.forName(name);
conn = DriverManager.getConnection(url);
stmt = conn.createStatement();
rs = stmt.executeQuery(SQL);
while (rs.next()) {
System.out.println(rs.getString("name"));
}
close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void close() {
try {
conn.close();
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
经过研究,我发现这是由于您的连接网址所致.
After some research, I found out it is because of your connect url.
您需要修改您的连接URL:
You need to modify your connect url :
jdbc:jtds:sqlserver://haozailai.database.windows.net:1433/<your application db name> ...
您可以参考下面的页面以获取更多详细信息.
You could refer to the pages below for more details.
更新答案:
Update answer:
我已经对您的连接URL进行了一些调整,并且可以正常连接到我的应用程序数据库.
I have made a slight adjustment to your connect URL and can connect to my application database normally.
try {
String SQL = "select * from dbo.Student";
Class.forName("net.sourceforge.jtds.jdbc.Driver");
String url = String.format("jdbc:jtds:sqlserver://***.database.windows.net:1433/<your database name>;user=***;password=***;encrypt=true;trustServerCertificate=false;hostNameInCertificate=*.database.windows.net;loginTimeout=30;");
conn = DriverManager.getConnection(url);
stmt = conn.createStatement();
rs = stmt.executeQuery(SQL);
while (rs.next()) {
System.out.println(rs.getString("name"));
}
close();
} catch (Exception e) {
e.printStackTrace();
}
请注意,删除 database = ***
并在主机字符串之后添加"/<您的数据库名称>"
.
Notice that remove the database=***
and add "/<your database name>"
after your host string.
请参考上面的代码,然后重试.如有任何问题,请告诉我.
Please refer to the above code and try again.Any concern, please let me know.
希望它对您有帮助.
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