mybatis如何通过jdbc连接sqlserver数据库

我用的NavicatServer软件 制作的数据库表,并且可以连接上 有ip地址 用户名和密码

在junit测试的时候 报错:
Cause: com.microsoft.sqlserver.jdbc.SQLServerException: 通过端口 1433 连接到主机 127.0.0.1,1433 的 TCP/IP 连接失败。错误:“null。请验证连接属性。确保 SQL Server 的实例正在主机上运行,且在此端口接受 TCP/IP 连接,还要确保防火墙没有阻止到此端口的 TCP 连接。”。

在网上找了很多办法没有解决。
1先是从官网下载了sqlserver的安装包 安装上了
2有下载了jdbc连接sqlserver的驱动包
这样反复几次还是这个报错信息

问题已经解决了:谢谢大家。
只需要更改url上的IP地址和端口号即可。无需在本地安装sqlserver数据库啦!

1个回答

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在sqlserver 数据库表中插入中文,查看表,中文显示乱码

sprintf(szSQL,"insert into %s (fromid,toid,time,msg,fontface,fontsize,fontcolor,fontflags) VALUES (%u,%u,%u,'%s','%s',%u,%u,%u)",TABLE_IM_MSG,ulFromID,ulToID,tCurrentTime,strMsg.c_str(),strfontface.c_str(),fontsize,fontcolor,fontflags); 然后执行execute(szSQL ),然后查看表,msg字段的值显示中文乱码,但是英文是没问题的

jdbc执行sql 不支持“variant”数据类型。

我一个sql查询表说明字段 ``` select top 100 [value] from sys.extended_properties ``` 在java中使用jdbc执行的时候总是报错,说value是一个变量类型。如下错误 ``` Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: 不支持“variant”数据类型。 ``` 请问有人遇到过吗,如何解决

springnvc+mybatis+C3P0连接池,一段时间数据库就崩溃了,求援~

云服务上有三个tomcat服务器,都启动一段时间后报异常,mysql数据库崩溃,求帮助,怎么配置都配置不行 applicationcontext中连接池配置 ``` <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}" /> <property name="jdbcUrl" value="${jdbc.url}" /> <property name="user" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <!--连接池中保留的最小连接数。 --> <property name="minPoolSize" value="${minPoolSize}" /> <!--连接池中保留的最大连接数。Default: 15 --> <property name="maxPoolSize" value="${maxPoolSize}" /> <!--最大空闲时间,1800秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 --> <property name="maxIdleTime" value="${maxIdleTime}" /> <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 --> <property name="acquireIncrement" value="${acquireIncrement}" /> <!--c3p0全局的PreparedStatements缓存的大小。如果maxStatements与maxStatementsPerConnection均为0,则缓存不生效,只要有一个不为0,则语句的缓存就能生效。如果默认值:0 --> <property name="maxStatements" value="${maxStatements}" /> <property name="initialPoolSize" value="${initialPoolSize}" /> <!--当连接池用完时客户端调用getConnection()后等待获取新连接的时间,如设为0则无限期等待。单位毫秒。Default: 0 --> <property name="checkoutTimeout" value="${checkoutTimeout}" /> <!--每60秒检查所有连接池中的空闲连接。Default: 0 --> <property name="idleConnectionTestPeriod" value="${idleConnectionTestPeriod}" /> <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 --> <property name="acquireRetryAttempts" value="${acquireRetryAttempts}" /> <property name="breakAfterAcquireFailure" value="${breakAfterAcquireFailure}" /> <property name="testConnectionOnCheckout" value="${testConnectionOnCheckout}" /> <property name="connectionCustomizerClassName" value="com.tanwuapp.util.handler.UTF8MB4ConnectionCustomizer" /> </bean> ``` ``` minPoolSize=10 <!--连接池中保留的最大连接数。Default: 15 --> maxPoolSize=40 <!--最大空闲时间,30秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 --> maxIdleTime=30 <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 --> acquireIncrement=3 <!--c3p0全局的PreparedStatements缓存的大小。如果maxStatements与maxStatementsPerConnection均为0,则缓存不生效,只要有一个不为0,则语句的缓存就能生效。如果默认值: 0--> maxStatements=50 <!--maxStatementsPerConnection定义了连接池内单个连接所拥有的最大缓存statements数。默认值: 0 --> maxStatementsPerConnection=0 initialPoolSize=10 <!--当连接池用完时客户端调用getConnection()后等待获取新连接的时间,如设为0则无限期等待。单位毫秒。Default: 0 --> checkoutTimeout=10000 <!--每30秒检查所有连接池中的空闲连接。Default: 0 --> idleConnectionTestPeriod=30 <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 --> acquireRetryAttempts=30 breakAfterAcquireFailure=true testConnectionOnCheckout=false ``` 异常信息: ``` org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.) ### The error may exist in file [/home/webapps/tomcat-1.2.1/tanwuapps/TanWuAppAPI_v1.2.1/WEB-INF/classes/com/tanwuapp/dao/mapper/BasBannerMapper.xml] ### The error may involve com.tanwuapp.dao.BasBannerDao.findAllInfo ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.) at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371) at com.sun.proxy.$Proxy9.selectList(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:198) at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:119) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) at com.sun.proxy.$Proxy42.findAllInfo(Unknown Source) at com.tanwuapp.service.impl.HomePageServiceImpl.getBannerList(HomePageServiceImpl.java:55) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198) at com.sun.proxy.$Proxy46.getBannerList(Unknown Source) at com.tanwuapp.controller.ProductSearchController.searchHomeBannerData(ProductSearchController.java:78) at com.tanwuapp.controller.ProductSearchController$$FastClassBySpringCGLIB$$1b828f00.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:700) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.cache.interceptor.CacheInterceptor$1.invoke(CacheInterceptor.java:58) at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:211) at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:66) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:633) at com.tanwuapp.controller.ProductSearchController$$EnhancerBySpringCGLIB$$f6dc0725.searchHomeBannerData(<generated>) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:855) at javax.servlet.http.HttpServlet.service(HttpServlet.java:650) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829) at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.ibatis.exceptions.PersistenceException: ```

sql语句问题为什么在数据库中文可以执行但在mybatis中就不行求大佬指点 万分感谢

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sqlserver 线上无法插入数据 springmvc

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如何根据条件查询数据库中的记录

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springboot+mybatis切换数据源问题

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用JDBC连接oracle11g时 有如下问题

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