我正在尝试从我的Java应用程序查询dbf表。我参考了这个thread
我使用ODBC数据源管理器创建了一个系统数据源,我将数据源名称设置为VFPDS,并将数据库类型设置为.DBC,最后设置.dbc文件的路径。
以下是我的java代码:
import javax.swing.* ;
import java.awt.* ;
import java.awt.event.* ;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;
// Import custom library containing myRadioListener
import java.sql.DriverManager;
public class testodbc {
public static void main( String args[] )
{
try
{
// Load the database driver
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" ) ;
// Get a connection to the database
Connection conn = DriverManager.getConnection( "jdbc:odbc:VFPDS" ) ;
// Print all warnings
for( SQLWarning warn = conn.getWarnings(); warn != null; warn = warn.getNextWarning() )
{
System.out.println( "SQL Warning:" ) ;
System.out.println( "State : " + warn.getSQLState() ) ;
System.out.println( "Message: " + warn.getMessage() ) ;
System.out.println( "Error : " + warn.getErrorCode() ) ;
}
// Get a statement from the connection
Statement stmt = conn.createStatement() ;
// Execute the query
ResultSet rs = stmt.executeQuery( "SELECT * FROM pmsquoteh" ) ;//code crashes here
// Loop through the result set
while( rs.next() )
System.out.println( rs.getString(1) ) ;
// Close the result set, statement and the connection
rs.close() ;
stmt.close() ;
conn.close() ;
}
catch( SQLException se )
{ se.printStackTrace();
System.out.println( "SQL Exception:" ) ;
// Loop through the SQL Exceptions
while( se != null )
{ se.printStackTrace();
System.out.println( "State : " + se.getSQLState() ) ;
System.out.println( "Message: " + se.getMessage() ) ;
System.out.println( "Error : " + se.getErrorCode() ) ;
se = se.getNextException() ;
}
}
catch( Exception e )
{
System.out.println( e ) ;
}
}
}
我遇到了这个例外:
java.sql.SQLException: [Microsoft][ODBC Visual FoxPro Driver]Not a table.
at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.SQLExecDirect(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.execute(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.executeQuery(Unknown Source)
at UsingButtons.main(testodbc.java:38)
SQL Exception:
State : S0002
Message: [Microsoft][ODBC Visual FoxPro Driver]Not a table.
Error : 123
我确信表pmsquoteh退出数据库,我的机器是64位机器。 我究竟做错了什么 ?我将很感激具体的答案。
答案 0 :(得分:0)
我能够在Windows 7上使用jdbc-odbc桥访问FoxPro表,但它花了很多步。我已经安装了VFP驱动程序,我不记得我从哪里下载它,所以我没有链接。
我在这里复制了jbdc:odbc示例中的代码:http://www.java2s.com/Code/Java/Database-SQL-JDBC/SimpleexampleofJDBCODBCfunctionality.htm。
DriverManager.getConnection方法采用数据库URL。要创建URL,您需要使用ODBC管理器。不幸的是,我可以通过控制面板访问的ODBC管理器仅适用于64位数据源。我不知道64位foxpro驱动程序。
要生成32位DSN,您需要运行32位ODBC管理器:odbcad32.exe。我的机器有几个副本。我从C:\ Windows \ SysWOW64运行了一个。转到系统DSN选项卡,然后选择Microsoft Visual Foxpro驱动程序。单击完成后,您将看到一个对话框,询问FoxPro数据库或表的数据源名称,描述和路径。您还必须指定是否要连接到.dbc或空闲表目录。您的错误消息让我想知道您的DSN上是否选择了错误的选项。
我传入getConnection方法的数据库URL是“jdbc:odbc:mydsnname”。
我跑了之后,收到了一个错误:
[Microsoft] [ODBC驱动程序管理器]指定的DSN包含 驱动程序和应用程序之间的体系结构不匹配
这是因为我使用的是64位JVM和32位DSN。我下载了一个32位的JVM,并能够用它来运行我的示例类。
我不知道是否有一个可以在64位JVM上设置的开关告诉它以32位运行。
答案 1 :(得分:0)
我从这里使用了JDBC驱动程序:
对我来说很好。在目前的测试中(大约一个小时),它会读取MEMO文件,并且似乎没有任何与DBC包含的表或免费DBF有关的问题。
不确定此驱动程序的成本。由于VFP已经过时,客户最多只需支付100美元。
答案 2 :(得分:0)
过去六个月我一直在使用javadbf-0.4.0.jar,并且没有问题。我将发布我的Java类和主程序。
package foxtablereader.src;
import java.sql.Connection;
import java.sql.SQLException;
import sun.jdbc.rowset.CachedRowSet;
/**
*
* @author kalimk
*/
public class DbfMain {
static CachedRowSet crs;
/**
* @param args the command line arguments
*/
public static void main(String[] args) throws SQLException {
DbfConnection foxconn = new DbfConnection();
Connection connection = null;
String inputTablePath = "c:\\vfp_table\\";
connection = foxconn.connection(inputTablePath);
String query = "SELECT * FROM TrigExport2.dbf ";
crs = foxconn.select(query, connection);
//crs = ft.query(query, inputTablePath);
System.out.println(" Size " + crs.size());
while (crs.next()) {
System.out.println("DESC " + crs.getString("Serialnum") + " " + crs.getString("cmailcode"));
}
inputTablePath = "C:\\sourcecode\\FoxTableReader\\";
connection = foxconn.connection(inputTablePath);
query = "SELECT * FROM TrigExports.dbf ";
crs = foxconn.select(query, connection);
System.out.println(" Size " + crs.size());
int z = 1;
while (crs.next()) {
System.out.println(z++ + " " + crs.getString("Serialnum") + " " + crs.getString("cmailcode"));
}
inputTablePath = "C:\\sourcecode\\FoxTableReader\\";
connection = foxconn.connection(inputTablePath);
String queryinsert = "insert into Mcdesc (Desc,Mailcode,Del_type,Column1) values ('Kalim','KHAN', 'ERUM','KHAN')";
foxconn.insertUpdate(queryinsert, connection);
inputTablePath = "C:\\sourcecode\\FoxTableReader\\";
connection = foxconn.connection(inputTablePath);
String queryupdate = "update Mcdesc set Column1= 'Sadiqquie' where Desc = 'Kalim'";
foxconn.insertUpdate(queryupdate, connection);
}
}
package foxtablereader.src;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import sun.jdbc.rowset.CachedRowSet;
/**
*
* @author kalimk
*/
public class DbfConnection {
public Connection connection(String inputTablePath) throws SQLException {
Connection con = null;
//String jdbURL = "jdbc:DBF:/C:\\vfp_table\\";
String jdbURL = "jdbc:DBF:/" + inputTablePath;
Properties props = new Properties();
props.setProperty("delayedClose", "0");
try {
Class.forName("com.caigen.sql.dbf.DBFDriver");
try {
con = DriverManager.getConnection(jdbURL, props);
} catch (SQLException ex) {
Logger.getLogger(DbfConnection.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (ClassNotFoundException ex) {
Logger.getLogger(DbfConnection.class.getName()).log(Level.SEVERE, null, ex);
}
return con;
}
public CachedRowSet select(String cQuery, Connection con) {
CachedRowSet crs = null;
try {
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(cQuery);
crs = new CachedRowSet();
crs.populate(rs);
stmt.close();
} catch (Exception e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
return crs;
}
public boolean insertUpdate(String cQuery, Connection con) {
boolean crs = false;
try {
PreparedStatement pStmnt = con.prepareStatement(cQuery);
crs = pStmnt.execute();
pStmnt.close();
} catch (Exception e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
return crs;
}
public int insertUpdateCount(String cQuery, Connection con) {
int count = 0;
try {
Statement stmt = con.createStatement();
count = stmt.executeUpdate(cQuery);
System.out.println("Number of rows updated in database = " + count);
stmt.close();
} catch (Exception e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
return count;
}
public int insertUpdateCount2(String cQuery, Connection con) {
int count = 0;
boolean crs = false;
try {
PreparedStatement pStmnt = con.prepareStatement(cQuery);
count = pStmnt.executeUpdate(cQuery);
pStmnt.close();
} catch (Exception e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
return count;
}
public static void DBDisconnect(Connection DBCon) {
try {
if (DBCon != null) {
DBCon.close();
}
} catch (SQLException e) {
System.out.println(e.toString());
} finally {
try {
DBCon.close();
//System.err.println("Fimally is always executed");
} catch (SQLException ex) {
Logger.getLogger(DbfConnection.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}