在OS X上。
$ java -version
java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode)
这是我的整个项目:
$ ll
total 1072
-rw-r--r-- 1 ethan ethan 1316 Oct 19 17:17 BlackberryDataExtractor.class
-rw-r--r-- 1 ethan ethan 1439 Oct 19 18:05 BlackberryDataExtractor.java
-rw-r--r--@ 1 ethan ethan 537303 Apr 19 2010 sqljdbc4.jar
<-- MS SQL Server JDBC driver
这是BlackberryDataExtractor.java
。它还没有真正做任何事情。我只是想让基本的东西像数据库连接一样工作:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import com.microsoft.sqlserver.jdbc;
class BlackberryDataExtractor {
public static void main(String[] args) {
Connection con = BlackberryDataExtractor.getConnection();
}
public static final Connection getConnection()
{
Connection con = null;
try
{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
con = DriverManager.getConnection("jdbc:sqlserver://[ etc... ]");
String SQL = "SELECT uc.MailboxSMTPAddr AS email, sd.PhoneNumber AS phone_number"
+ "FROM dbo.UserConfig uc, dbo.SyncDeviceMgmtSummary sd"
+ "WHERE sd.UserConfigId = uc.Id";
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(SQL);
while (rs.next()) {
System.out.println(rs.getString("email") + ", " + rs.getString("phone_number"));
}
rs.close();
stmt.close();
}
catch(SQLException e)
{
e.printStackTrace();
}
catch(ClassNotFoundException e)
{
e.printStackTrace();
}
return con;
}
}
它不会编译。这是错误:
$ javac -cp "$CLASSPATH;*.jar" BlackberryDataExtractor.java
BlackberryDataExtractor.java:4: package com.microsoft.sqlserver does not exist
import com.microsoft.sqlserver.jdbc;
^
BlackberryDataExtractor.java:23: cannot find symbol
symbol : class Statement
location: class BlackberryDataExtractor
Statement stmt = con.createStatement();
^
BlackberryDataExtractor.java:24: cannot find symbol
symbol : class ResultSet
location: class BlackberryDataExtractor
ResultSet rs = stmt.executeQuery(SQL);
^
3 errors
答案 0 :(得分:2)
javac
不了解*.jar
之类的通配符。你必须明确。
尝试javac -cp "$CLASSPATH;sqljdbc4.jar" ...
答案 1 :(得分:1)
是否直接指定jar文件而不是使用glob“* .jar”工作?
javac -cp "$CLASSPATH;sqljdbc4.jar" BlackberryDataExtractor.java
看起来你还缺少一些java.sql。进口。 (ResultSet和Statement)
答案 2 :(得分:0)
我有同样的问题。当我在Eclipse中编写和执行程序时,一切正常,但是当我在终端(Ubuntu)中执行程序时,出现错误“包com.microsoft.sqlserver不存在”。我不确定这是否是一个好的解决方案,但我将项目导出到jar文件,然后运行java -jar "filename".jar.
,然后一切正常。