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Objective: To practice JDBC
Problem description: The simplest database connection error is that the TCP/IP connection to the host fails. (Windows 7 Operating System)
Eclipse 8.5 error:
Com. Microsoft. sqlserver. JDBC. sqlserverexception
Exception com. microsoft. sqlserver. jdbc. SQLServerException: The exception information for truncating string or binary data is as follows: Causedby: com. microsoft.
When using myeclipse to connect to the database, the following error occurs: Servlet. service () forservletjspthrewexceptioncom. microsoft. sqlserver. jdbc. SQLServerException: This server version is not supported. The target server must be SQLServer2000 or later. Atcom. microsoft
An exception occurred while exchanging data from Oracle to the SQL Server intermediate database.
Com. Microsoft. sqlserver. JDBC. sqlserverexception: truncates string or binary data.
The exception information is as follows:
Caused:
Com
Com. microsoft. sqlserver. jdbc. SQLServerException: connection to the TCPIP of the host localhost through port 1433 fails. Error: Connectionrefused: connect. Verify the Connection Properties, check that the SQLServer instance is
=
; Password =
"); // Version 2000
3. drivers are required for connecting JAVA to SQL.
Sql2000 requires three jar packages: mssqlservice. jar, msutil. jar, and msbase. jar.Sql2005 requires a jar package: sqljdbc. jarTherefore, the connection methods of SQL2000 and 2005 are different. As for sqljdbc. jar, you can directly download it from csdn or go to the official next installation package.
4. Based on the above, change the data source
Com. microsoft. sqlserver. jdbc. SQLServerException: The result set does not have the current row, and the result set is exhausted.Refer to blog com. microsoft.
Java obtains the result set, if (RS! = NULL), which is different from while (Rs. Next ().
Com. Microsoft. sqlserver. JDBC. sqlserverexception: The result set does not have the current row.
Cause: the RS position of the result set is located at the beginning of the first
Com. Microsoft. sqlserver. JDBC. sqlserverexception: The system memory is insufficient. Use the server-side cursor: Java heap space for large resultset. Resultset size: 417,666,054. Total JVM memory size: 66,650,112.
This exception occurs when the SQL statement is too poo
Myeclipse error message:
Error: COM. Microsoft. sqlserver. JDBC. sqlserverexception: the object name 'xx' is invalid.
Warning SQL error: 208, sqlstate: s0002
Error Description: The hql statement can be run in sqlserver, but a
The driver has been copied to the class path directory, and the specified class is not found, and then "jakarta-tomcat-5.0.28" for "jboss-4.0.2"
Org. springframework. jdbc. cannotGetJdbcConnectionException: cocould not get JDBC Connection; nested exception is org. apache. commons. dbcp. SQLNestedException: Cannot load JDBC driver class '
1. Are you sure you want to install the full JDBC version? Because there is a single-host version that can only connect to the SQL statements on the local machine, the single-host version is about 2 m, and the full version is about 6.5 m
2. After JDBC is installed, if the directory is in C:/program files/Microsoft SQL Server 2000
1. The error "Java. Lang. classnotfoundexception: COM. Microsoft. JDBC. sqlserver. sqlserverdriver" is displayed:
The final cause may be as follows:
1. SQL Server 2000 driver for JDBC is not installed
2. Pay attention to you after installationProgramWhether the package of
Java. SQL. sqlexception: [Microsoft] [sqlserver 2000 driver for JDBC] [sqlserver] The input table format data stream (TDS) Remote Process Call (RPC) protocol stream is incorrect. Parameter 1 (""): the data type 0x38 is unknown.At com. Mi
I have to write down some of the problems that I have encountered many times. The lessons have been delayed for a lot of time.
Problem description
Write a code to connect to the Database SQL Server in Java;
As follows:
Import java. SQL .*;
Public class tosql2000 {Public static void main (string [] SRG ){String drivername = "com. Microsoft. JDBC.
// Get the connectionPrivate connection conn = connectionfactory. getconnection ();// Generate operable objectsPrivate preparedstatement pstmt = NULL;
When a connection is used as a private field of a class, it may only be an instance, which leads to this error. (The reason is somewhat far-fetched)
Even the connection pool reports such an error.
Therefore, each method requires an instance of its own.
Adding multiple entity instances to the list does not allow spring injection of get. It
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