如何通过java代码连接sql server？
我正在创建应用程序，我需要将我的服务连接到SQL Server。 当我在添加依赖项后运行测试代码时，它会成功运行。 这是成功运行的测试代码：
import java.sql.Connection; import java.sql.DatabaseMetaData; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.sql.*; public class SQLConnection { public static void main(String[] args) throws ClassNotFoundException, SQLException { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); Connection conn = DriverManager.getConnection("jdbc:sqlserver://10.235.5.38\\name;user=sa;password=password;database=dbname"); Statement sta = conn.createStatement(); if (conn != null) { DatabaseMetaData dm = (DatabaseMetaData) conn.getMetaData(); System.out.println("Driver name: " + dm.getDriverName()); System.out.println("Driver version: " + dm.getDriverVersion()); System.out.println("Product name: " + dm.getDatabaseProductName()); System.out.println("Product version: " + dm.getDatabaseProductVersion()); } } } 但是当我为jdbc添加依赖并在创建服务时运行相同的代码时，它给出了如下错误：
java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1142) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.zcon.vmh.dao.implementations.AdvisoryBoxDaoImpl.connectionTest(AdvisoryBoxDaoImpl.java:131) at com.zcon.vmh.services.implementation.AdvisoryBoxServiceImpl.connectionTest(AdvisoryBoxServiceImpl.java:19) at com.zcon.vmh.controller.AdvisoryBoxController.connectionTest(AdvisoryBoxController.java:40) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:832) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:743) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858) at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)
我在pom.xml中添加了这个依赖项：
com.microsoft.sqlserver sqljdbc4 4.2 test
我应该做些什么改变才能在创建服务时成功连接？
您的依赖项的范围是test ，这意味着它在应用程序正常运行时不会在类路径中（而不是作为测试）。 将范围更改为runtime ，在这种情况下，如果在IDE中运行应用程序或使用Maven插件打包它，则.jar中的类将在运行时可用。
如果您仍然面临maven的问题，您可以单独下载sqlserver jar文件并将其添加到您的项目中并尝试再次运行。下面是下载jar文件的路径。
遗憾的是，Microsoft不会通过任何maven存储库提供此工件。 我建议您使用以下依赖项来解决您的问题
微软已经向maven central发布了一些驱动程序：
com.microsoft.sqlserver mssql-jdbc 6.1.0.jre8