这是程序
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class test {
public static final String DBDRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
public static final String DBURL="jdbc:sqlserver://localhost:1433;databaseName=Employees";
public static final String DBUSER="sa";
public static final String DBPASS="123456";
public static void main(String[] args)throws Exception{
Connection conn=null;//数据库连接
try{
Class.forName(DBDRIVER);
System.out.println("【加载驱动成功】");
}catch(ClassNotFoundException e){
System.out.println("【加载驱动失败】");
e.printStackTrace();
}
try {
conn=DriverManager.getConnection(DBURL,DBUSER,DBPASS);
System.out.println("【链接成功】");
} catch (SQLException e2) {
System.out.println("【链接失败】");
e2.printStackTrace();
}
try {
conn.close();
System.out.println("【断开链接】");
} catch (SQLException e3) {
e3.printStackTrace();
}
}
}

这是结果
【加载驱动成功】
2016-11-22 20:31:16 com.microsoft.sqlserver.jdbc.TDSChannel enableSSL
信息: java.security path: C:\Program Files (x86)\Java\jre6\lib\security
Security providers: [SUN version 1.6, SunRsaSign version 1.5, SunJSSE version 1.6, SunJCE version 1.6, SunJGSS version 1.0, SunSASL version 1.5, XMLDSig version 1.0, SunPCSC version 1.6, SunMSCAPI version 1.6]
SSLContext provider info: Sun JSSE provider(PKCS12, SunX509 key/trust factories, SSLv3, TLSv1)
SSLContext provider services:
[SunJSSE: KeyFactory.RSA -> sun.security.rsa.RSAKeyFactory
aliases: [1.2.840.113549.1.1, OID.1.2.840.113549.1.1]
, SunJSSE: KeyPairGenerator.RSA -> sun.security.rsa.RSAKeyPairGenerator
aliases: [1.2.840.113549.1.1, OID.1.2.840.113549.1.1]
, SunJSSE: Signature.MD2withRSA -> sun.security.rsa.RSASignature$MD2withRSA
aliases: [1.2.840.113549.1.1.2, OID.1.2.840.113549.1.1.2]
, SunJSSE: Signature.MD5withRSA -> sun.security.rsa.RSASignature$MD5withRSA
aliases: [1.2.840.113549.1.1.4, OID.1.2.840.113549.1.1.4]
, SunJSSE: Signature.SHA1withRSA -> sun.security.rsa.RSASignature$SHA1withRSA
aliases: [1.2.840.113549.1.1.5, OID.1.2.840.113549.1.1.5, 1.3.14.3.2.29, OID.1.3.14.3.2.29]
, SunJSSE: Signature.MD5andSHA1withRSA -> com.sun.net.ssl.internal.ssl.RSASignature
, SunJSSE: KeyManagerFactory.SunX509 -> com.sun.net.ssl.internal.ssl.KeyManagerFactoryImpl$SunX509
, SunJSSE: KeyManagerFactory.NewSunX509 -> com.sun.net.ssl.internal.ssl.KeyManagerFactoryImpl$X509
, SunJSSE: TrustManagerFactory.SunX509 -> com.sun.net.ssl.internal.ssl.TrustManagerFactoryImpl$SimpleFactory
, SunJSSE: TrustManagerFactory.PKIX -> com.sun.net.ssl.internal.ssl.TrustManagerFactoryImpl$PKIXFactory
aliases: [SunPKIX, X509, X.509]
, SunJSSE: SSLContext.SSL -> com.sun.net.ssl.internal.ssl.SSLContextImpl
, SunJSSE: SSLContext.SSLv3 -> com.sun.net.ssl.internal.ssl.SSLContextImpl
, SunJSSE: SSLContext.TLS -> com.sun.net.ssl.internal.ssl.SSLContextImpl
, SunJSSE: SSLContext.TLSv1 -> com.sun.net.ssl.internal.ssl.SSLContextImpl
, SunJSSE: SSLContext.Default -> com.sun.net.ssl.internal.ssl.DefaultSSLContextImpl
, SunJSSE: KeyStore.PKCS12 -> com.sun.net.ssl.internal.pkcs12.PKCS12KeyStore
]
java.ext.dirs: C:\Program Files (x86)\Java\jre6\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
【链接失败】
com.microsoft.sqlserver.jdbc.SQLServerException: 驱动程序无法通过使用安全套接字层(SSL)加密与 SQL Server 建立安全连接。错误:“java.lang.RuntimeException: Could not generate DH keypair”。 ClientConnectionId:e5d09183-ca57-418d-9071-fdc00d33962d
at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:1667)
at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1668)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1323)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:991)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:827)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1012)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at test.main(test.java:24)
Caused by: javax.net.ssl.SSLException: java.lang.RuntimeException: Could not generate DH keypair
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.handleException(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1618)
... 7 more
Caused by: java.lang.RuntimeException: Could not generate DH keypair
at com.sun.net.ssl.internal.ssl.DHCrypt.<init>(Unknown Source)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverKeyExchange(Unknown Source)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)
at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)
at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
... 10 more
Caused by: java.security.InvalidAlgorithmParameterException: Prime size must be multiple of 64, and can only range from 512 to 1024 (inclusive)
at com.sun.crypto.provider.DHKeyPairGenerator.initialize(DashoA13*..)
at java.security.KeyPairGenerator$Delegate.initialize(Unknown Source)
... 17 more
Exception in thread "main" java.lang.NullPointerException
at test.main(test.java:33)

sqlserver可以用sa链接，没有问题，jar4的包也导入了，就是连不上数据库

没有人么

我只看见了，使用安全套，五个字

自己顶

conn=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=Employees","sa","123456");
试试

解决了嘛楼主。。。遇到了同样的问题，求助啊。。。
整到头皮发麻。。。