[英]Java connect to SQL Anywhere 17
我正在处理一个学校项目,我必须连接到在 17 的任何地方使用 SQL 完成的数据库,并且我不断收到流动错误:
找不到适合 jdbc:sqlanywhere:Tds:localhost:2638?eng="DBNAME" 的驱动程序。
欢迎任何帮助。
这是进行连接的类的代码。
package model;
import java.sql.*;
public class DBConnection {
public class ConnectionHandler {
ResultSet r;
Statement s;
String returnStatus;
}
private String db, user, passwd;
private String dbUrl;
private Connection conn;
public DBConnection(String db, String user, String passwd, Object openserver, String databasepath) {
this.db = db;
this.user = user;
this.passwd = passwd;
dbUrl = "jdbc:sqlanywhere:Tds:localhost:2638?eng=" + db;
try {
conn = DriverManager.getConnection(dbUrl, user, passwd);
conn.setAutoCommit(false);
} catch (Exception e) {
System.out.println(e);
Boolean openServer = (Boolean) openserver;
if (openServer.booleanValue())
try {
String engcommand = "dbeng12 " + databasepath + db + ".db";
Runtime.getRuntime().exec(engcommand);
long t0, t1;
t0 = System.currentTimeMillis();
do {
t1 = System.currentTimeMillis();
} while (t1 - t0 < 5000);
conn = DriverManager.getConnection(dbUrl, user, passwd);
conn.setAutoCommit(false);
} catch (Exception ex) {
System.out.println("Unable to start server. " + ex);
}
}
}
public void updateStatement(String sql, ConnectionHandler ch) {
Integer result = new Integer(0);
String message = null;
if (sql.trim().substring(0, 1).equalsIgnoreCase("U"))
message = "Number of rows updated: ";
else if (sql.trim().substring(0, 1).equalsIgnoreCase("I"))
message = "Number of rows inserted: ";
else
message = " ";
try {
ch.s = conn.createStatement();
result = new Integer(ch.s.executeUpdate(sql));
ch.returnStatus = message + result;
} catch (Exception e) {
System.out.println("Unable to execute the insert/update/delete statement. " + e);
ch.returnStatus = "Error:" + e.toString();
}
}
public void returnResultSetSelectStatement(String sql, int resultsetType, ConnectionHandler ch) {
ch.r = null;
try {
if (resultsetType == 1)
ch.s = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE);
else
ch.s = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
ch.r = ch.s.executeQuery(sql);
} catch (Exception e) {
ch.returnStatus = e.toString();
System.out.println("Unable to execute the returnSelectStatement. " + e);
}
}
}
您需要将sajdbc4.jar
添加到程序的类路径中。 如果您使用的是 NetBeans 或 Eclipse 等 IDE,则可以将sajdbc4.jar
添加为依赖库,NetBeans/Eclipse 会自动将其添加到类路径中。
如果您是从命令行运行上述程序, sajdbc4.jar
复制到上述 Java 程序所在的文件夹,然后使用以下命令编译该文件(这会将sajdbc4.jar
添加到类路径),
javac -classpath ./sajdbc4.jar DbConnection.java
使用以下命令运行Java程序(sajdbc4.jar添加到classpath),
java -classpath "./sajdbc4.jar;." DbConnection
或者,如果您使用 Maven 构建项目,也可以添加 Maven 依赖项。
使用"jdbc:sqlanywhere:DSN=SQL Anywhere 17 Demo;Password=sql"
http://dcx.sap.com/sqla170/en/html/3bd5b17c6c5f1014945fd2b7ec7cba6a.html
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.