【发布时间】：2013-11-26 03:51:53
【问题描述】：
我在尝试运行我的数据库程序时收到以下错误消息。这是我所了解的文件之一。
提前感谢您的帮助！
java.sql.SQLException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6964)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7121)
at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(JdbcOdbc.java:3080)
at sun.jdbc.odbc.JdbcOdbcConnection.initialize(JdbcOdbcConnection.java:323)
at sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:174)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:233)
at data.DbManager.getAccessDbConnection(DbManager.java:201)
at data.DbManager.<init>(DbManager.java:26)
at user.Frame.<init>(Frame.java:10)
at user.MainP8.main(MainP8.java:16)
DbManager.java
package data;
import java.sql.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
public class DbManager {
//Add to beginning of MS Access DB URL
private String ACCESS_DB_URL_PREFIX =
"jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
//Add to end of MS Access DB URL
private final String ACCESS_DB_URL_SUFFIX = ";DriverID=22;READONLY=false;}";
//File name of database
private final String MY_DB_NAME = "WebsiteDatabase.mdb";
private String fileName;
private Connection myConnection;
//constructor
public DbManager() {
try {
myConnection = getAccessDbConnection(MY_DB_NAME);
myConnection.setAutoCommit(true);
DatabaseMetaData md = myConnection.getMetaData();
} catch (SQLException ex) {
Logger.getLogger
(DbManager.class.getName()).log(Level.SEVERE, null, ex);
JOptionPane.showMessageDialog(null,
"The database could not be located. Please select the database"
+ " file you wish to connect to.",
"Database Error", JOptionPane.ERROR_MESSAGE);
JFileChooser chooser = new JFileChooser();
chooser.showOpenDialog(chooser);
fileName = chooser.getSelectedFile().toString();
try {
myConnection = getAccessDbConnection(fileName);
myConnection.setAutoCommit(true);
DatabaseMetaData md = myConnection.getMetaData();
} catch (SQLException ex1) {
Logger.getLogger
(DbManager.class.getName()).log(Level.SEVERE, null, ex1);
JOptionPane.showMessageDialog(null,
"The database could not be opened", "Fatal Error",
JOptionPane.ERROR_MESSAGE);
}
}
}
//"destructor" method to release the database connection
public void close() {
try {
myConnection.close();
} catch (SQLException ex) {
Logger.getLogger
(DbManager.class.getName()).log(Level.SEVERE, null, ex);
}
}
//public methods to access the database
public void insert(Website w) throws SQLException {
String sql;
//build SQL statement
sql = "INSERT INTO Websites";
sql += " (COMPANY_NAME, COMP_ASSETS, YR_FOUNDED, URL_ADD, ALEXA_RANK)";
sql += " VALUES (";
sql += "'" + w.getCompName() + "',";
sql += w.getAssets() + ",";
sql += " #" +w.getFounded() + "#,";
sql += " '" + w.getUrl() + "',";
sql += w.getAlexaRank() + ");";
insertRecord(sql);
}
public void update(Website w) throws SQLException {
String sql;
//SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
//date.parse(w.getFounded());
// "#"
//build SQL statement
sql = "UPDATE WebsiteS SET";
sql += " COMPANY_NAME = '" + w.getCompName() + "',";
sql += " COMP_ASSETS = " + w.getAssets() + ",";
sql += " YR_FOUNDED = #" + w.getFounded() + "#,";
sql += " URL_ADD = '" + w.getUrl() + "',";
sql += " ALEXA_RANK = " + w.getAlexaRank() ;
sql += " WHERE ID = " + w.getId() + ";";
updateRecord(sql);
}
public void delete(Website w) throws SQLException {
String sql;
sql = "DELETE * FROM Websites WHERE ID = " + w.getId() + ";";
deleteRecord(sql);
}
public String[] getWebsiteList() throws SQLException {
String strSql = "SELECT COMPANY_NAME FROM Websites;";
PreparedStatement ps = myConnection.prepareStatement(strSql,
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
ResultSet rs = ps.executeQuery();
rs.last();
int rowCount = rs.getRow();
String[] items = new String[rowCount];
try {
rs.beforeFirst();
int i = 0;
while(rs.next()) {
items[i] = rs.getString("COMPANY_NAME");
i++;
}
} catch (Exception ex){
JOptionPane.showMessageDialog(null,
"getWebsiteList: Unable to read website names: " + ex.getMessage());
System.out.println(ex.getStackTrace());
System.out.println(ex.getLocalizedMessage());
}
return items;
}
public int[] getWebsiteIds() throws SQLException {
int[] id;
String strSql = "SELECT ID FROM Websites;";
PreparedStatement ps = myConnection.prepareStatement(strSql,
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
ResultSet rs = ps.executeQuery();
rs.last();
int rowCount = rs.getRow();
id = new int[rowCount];
try {
rs.beforeFirst();
int i = 0;
while(rs.next()) {
id[i] = rs.getInt("ID");
i++;
}
} catch (Exception ex) {
JOptionPane.showMessageDialog(null,
"getWebsiteIDs: Unable to read Website IDs: " + ex.getMessage());
System.out.println(ex.getStackTrace());
System.out.println(ex.getLocalizedMessage());
}
return id;
}
public Website getWebsite(int wId) throws SQLException {
String[] rec;
String strSql = "SELECT * FROM Websites WHERE ID = " + wId + ";";
Website website = null;
PreparedStatement ps = myConnection.prepareStatement(strSql,
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
ResultSet rs = ps.executeQuery();
ResultSetMetaData rsMeta = rs.getMetaData();
int columns = rsMeta.getColumnCount();
rec = new String[columns];
try {
rs.beforeFirst();
while(rs.next()) {
for (int i = 0; i < columns; i++) {
rec[i] = rs.getString(i + 1);
}
}
//use the data to build the Website object
website = new Website(
//Integer.parseInt(rec[0]),
rec[0],
rec[1],
rec[2],
rec[3],
rec[4],
rec[5]
);
} catch (SQLException ex) {
System.out.println(ex.getStackTrace());
System.out.println(ex.getLocalizedMessage());
}
return website;
}
//private method to establish database connection
private Connection getAccessDbConnection(String fileName)
throws SQLException {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
} catch (ClassNotFoundException ex) {
System.err.println("JdbcOdbc Bridge Driver not Found");
JOptionPane.showMessageDialog(null, ex.getMessage(), "Driver Error",
JOptionPane.ERROR_MESSAGE);
System.exit(0);
}
String databaseURL = ACCESS_DB_URL_PREFIX + fileName
+ ACCESS_DB_URL_SUFFIX;
return DriverManager.getConnection(databaseURL);
}
//private methods to access the database
private void insertRecord(String strSql) throws SQLException {
Statement st = myConnection.createStatement();
try {
st.execute(strSql);
} catch (SQLException ex) {
System.err.println(ex.getStackTrace());
System.err.println(ex.getMessage());
System.err.println(ex.getLocalizedMessage());
}
st.close();
}
private void updateRecord(String strSql) throws SQLException {
//use prepared statement to ensure that the result set is editable
PreparedStatement ps = myConnection.prepareStatement(strSql,
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
try {
ps.execute();
} catch (SQLException ex) {
System.err.println(ex.getStackTrace());
System.err.println(ex.getMessage());
System.err.println(ex.getLocalizedMessage());
}
}
private void deleteRecord(String strSql) throws SQLException {
PreparedStatement ps = myConnection.prepareStatement(strSql,
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
try {
ps.execute();
} catch (SQLException ex) {
System.err.println(ex.getStackTrace());
System.err.println(ex.getMessage());
System.err.println(ex.getLocalizedMessage());
}
}
}
【问题讨论】：
-
检查这是否有帮助：stackoverflow.com/questions/19334723/… 此外，您必须提供 Db 的完整路径，而不是使用 Db 名称，例如
C:\\test\\Db\\WebsiteDatabase.mdb -
那行不通。仍然得到同样的错误。