Java 连接SqlServer问题

如果是 jdk7 和 jdk7 以前的版本，用 jdbc.jar
如果是 JDK8，用 jdbc4.jar  下载地址：https://mvnrepository.com/artifact/com.microsoft.sqlserver.jdbc/sqljdbc4/4.0
把jdbc4.jar 复制到java 目录 D:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\jdbc4.jar
然后启动应用类测试

public class xxxxx {
    public static void main(String[] args)
    { 
        String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
        String dbURL="jdbc:sqlserver://192.168.2.222:1433;DatabaseName=bylsn";
        String userName="mg";
        String userPwd="mg";
        try
        {
            Class.forName(driverName);
            Connection dbConn= DriverManager.getConnection(dbURL,userName,userPwd);
            Statement stmt = dbConn.createStatement();
            String sql ="SELECT * FROM [dbo].[xxxx] WHERE name = 'xxx'";
            ResultSet rs = stmt.executeQuery(sql);
            while(rs.next()){  //循环遍历查询结果集
 
                System.out.println(rs.getString("xxxx"));
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
            System.out.print("fail!");
        }
    }
 
}

如果链接报错，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:“The server selected protocol version TLS10 is not accepted by client preferences [TLS12]”。

 需要改下面这个文件几个禁用字符去掉
D:\Program Files\Java\jdk1.8.0_301\jre\lib\security\java.security

1.jdk.tls.legacyAlgorithms

jdk.tls.legacyAlgorithms=SSLv3, RC4, DES, MD5withRSA, \
DH keySize < 1024, EC keySize < 224, anon, NULL, \
include jdk.disabled.nameCurves

 2.jdk.certpath.disabledAlgorithms中改为：

jdk.certpath.disabledAlgorithms=MD2, MD5, SHA1 jdkCA & usage TLSServer, \
    RSA keySize < 1024, DSA keySize < 1024, EC keySize < 224, \
    include jdk.disabled.namedCurves