Question

好的

我正在尝试使用Apache连接池连接到一些不同的数据库，但是我很难通过Jtds使用LocalDb。我收到以下错误消息：

Aug 31, 2018 8:49:24 PM Model.DataAccessLayer.Database.ConnectionPool_LocalDb main
SEVERE: null
java.sql.SQLException: Network error IOException: \\.\pipe\MSSQL$LOCALDB#F1954C00\sql\query (The system cannot find the file specified)
    at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:436)
    at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:270)
    at org.apache.commons.dbcp2.DriverManagerConnectionFactory.createConnection(DriverManagerConnectionFactory.java:85)
    at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:260)
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:889)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:433)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:362)
    at org.apache.commons.dbcp2.PoolingDriver.connect(PoolingDriver.java:128)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:270)
    at Model.DataAccessLayer.Database.ConnectionPool_LocalDb.getConnection(ConnectionPool_LocalDb.java:175)
    at Model.DataAccessLayer.Database.ConnectionPool_LocalDb.main(ConnectionPool_LocalDb.java:100)
Caused by: java.io.FileNotFoundException: \\.\pipe\MSSQL$LOCALDB#F1954C00\sql\query (The system cannot find the file specified)
    at java.io.RandomAccessFile.open0(Native Method)
    at java.io.RandomAccessFile.open(RandomAccessFile.java:316)
    at java.io.RandomAccessFile.<init>(RandomAccessFile.java:243)
    at java.io.RandomAccessFile.<init>(RandomAccessFile.java:124)
    at net.sourceforge.jtds.jdbc.SharedLocalNamedPipe.<init>(SharedLocalNamedPipe.java:64)
    at net.sourceforge.jtds.jdbc.JtdsConnection.createNamedPipe(JtdsConnection.java:518)
    at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:328)

我正在使用的代码看起来像这样。如您所见，我已经尝试了一些不同的连接字符串，因为我觉得这就是问题所在。我：

    public static void main(String[] args) {

    //Connection Pool
    ConnectionPool_LocalDb pool = null;
    String driverPoolName = "docs";

    try {
        //Initialise H2 Connection
        String dbConnStrH2 = "jdbc:h2:~/test";
        String sqlH2 = "SELECT * FROM TEST2;";
        //Initialise Connection Pool
        pool = new ConnectionPool_LocalDb("jdbc:apache:commons:dbcp:", "org.apache.commons.dbcp2.PoolingDriver");
        //H2 Database
        pool.setupDriver(dbConnStrH2, driverPoolName);
        Connection h2Connection = pool.getConnection(driverPoolName);
        ResultSet h2ResultSet = pool.getResultSet(h2Connection, sqlH2);
        System.out.println("h2ResultSet = " + pool.getResultSetAsString(h2ResultSet));
        System.out.println("poolStats = " + pool.getPrintPoolStats(driverPoolName));

        //Initialise LocalDb Connection
        String driverPoolNameLocalDb = "localDb";
//        String dbConnStrLocalDb = "jdbc:jtds:sqlserver://./instance=LOCALDB#F1954C00;namedPipe=true";
//        String dbConnStrLocalDb = "jdbc:jtds:sqlserver://./instance=LOCALDB#F1954C00;namedPipe=true";
//        String dbConnStrLocalDb = "jdbc:jtds:sqlserver://./;instance=LOCALDB#F1954C00;namedPipe=true";
//        String dbConnStrLocalDb = "jdbc:jtds:sqlserver://./docs;instance=LOCALDB#F1954C00;namedPipe=true;domain=WORKGROUP";
          String dbConnStrLocalDb = "jdbc:jtds:sqlserver://./;instance=LOCALDB#F1954C00;namedPipe=true;domain=WORKGROUP";

        String sqlLocalDb = "SELECT * FROM [docs].[dbo].[documents]";
        //Sql Server LocalDb
        pool.setupDriver(dbConnStrLocalDb, driverPoolName);
        Connection LocalDbConnection = pool.getConnection(driverPoolName);
        ResultSet LocalDbResultSet = pool.getResultSet(LocalDbConnection, sqlLocalDb);
        System.out.println("LocalDbResultSet = " + pool.getResultSetAsString(LocalDbResultSet));
        System.out.println("poolStats = " + pool.getPrintPoolStats(driverPoolNameLocalDb));

        //Shutting down connections
        h2Connection.close();
        LocalDbConnection.close();
        pool.shutdownDriver(driverPoolName);

    } catch (Exception ex) {
        Logger.getLogger(ConnectionPool_LocalDb.class.getName()).log(Level.SEVERE, null, ex);
    }
    //Shut down driver pools
    try {
        pool.shutdownDriver(driverPoolName);
    } catch (Exception e) {
        e.printStackTrace();
    }

}

也许我可能在以下方面遭受与阿杰相同的问题： Connecting to SQL Server LocalDB using JDBC

错误发生在Connection LocalDbConnection = pool.getConnection(driverPoolName);行

令人讨厌的是，通过jtds连接到生产SQL Server确实很容易，但遗憾的是我在开发阶段无法这样做。

我已经设法通过Sql Server Management Studio连接到LocalDb。

任何帮助将不胜感激。

通过Jtds连接到Sql Server Local Db

0 个答案: