使用mybatis注解開發(fā)的時候，總會遇到很多問題，但是mybatis的注解并不是那么的美好，一些問題或者錯誤根本不能給出準確的定位，有時候，甚至?xí)o出Unknow Source的錯誤，獲取就是一個關(guān)閉標簽沒有關(guān)上。此類問題，在xml配置中，mybatis做的比較好，所以，官方也不是很放心其注解，建議使用xml。

1. 錯誤日志

[16/08/16 02:15:40:040 CST] http-nio-8080-exec-4 ERROR filter.ExceptionFilter: [DUBBO] Got unchecked and undeclared exception which called by 127.0.0.1. service: cn.test.web.service.ShareService, method: getShareChannelStInfoList, exception: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

### Error querying database. Cause: java.lang.NumberFormatException: For input string: "2016-08-11"

### Cause: java.lang.NumberFormatException: For input string: "2016-08-11", dubbo version: 2.8.4, current host: 127.0.0.1

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

### Error querying database. Cause: java.lang.NumberFormatException: For input string: "2016-08-11"

### Cause: java.lang.NumberFormatException: For input string: "2016-08-11"

at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:76)

at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:399)

at com.sun.proxy.$Proxy32.selectList(Unknown Source)

at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:205)

at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:122)

at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:64)

at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)

at com.sun.proxy.$Proxy57.getShareChannelStInfo(Unknown Source)

at cn.test.web.repository.ShareStInfoRepo.getShareChannelList(ShareStInfoRepo.java:37)

at cn.test.web.impl.ShareServiceImpl.getShareChannelStInfoList(ShareServiceImpl.java:72)

at com.alibaba.dubbo.common.bytecode.Wrapper19.invokeMethod(Wrapper19.java)

at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46)

at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72)

at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53)

at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:70)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:132)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:52)

at com.alibaba.dubbo.common.bytecode.proxy9.getShareChannelStInfoList(proxy9.java)

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.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:137)

at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:288)

at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:242)

at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:229)

at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)

at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179)

at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220)

at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)

at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

at com.alibaba.dubbo.rpc.protocol.rest.DubboHttpServer$RestHandler.handle(DubboHttpServer.java:86)

at com.alibaba.dubbo.remoting.http.servlet.DispatcherServlet.service(DispatcherServlet.java:64)

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 com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)

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:528)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)

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)

2.錯誤代碼

這段代碼，就是mybatis的動態(tài)查詢，就是組裝sql語句。但是，這里必須注意一個問題，那就是startd和endd,這兩個變量是ShareChannelStInfo中的私有變量，是String類型的。

錯誤的引起，是startd != 0和endd != 0引起的，原因給的是字符串，卻拿一個數(shù)字比較，mybatis會做一些轉(zhuǎn)化，結(jié)果在數(shù)字格式化時發(fā)生異常。

@Select("

" select * from `test`.`share_channel_st_info`" +

" where 1 = 1" +

" " +

" " +

" and channel=#{channel}" +

" " +

" " +

" and channel=0" +

" " +

" " +

" " +

" and time >=#{startd}" +

" " +

" and time <=#{endd}" +

" " +

" " +

" order by ${orderby}" +

" " +

" " +

" order by time desc" +

" " +

" " +

" limit #{offset}, #{limit}" +

"")

List getShareChannelStInfo(ShareChannelStInfo info);

3. 解決錯誤

加單引號是無法解決的，比如：startd != '0'，此時，mybatis認為拿一個字符串(String)和一個字符(char)比較，也會報錯。

因此，有幾種方法可以解決此問題：

一是：轉(zhuǎn)成字符串：'0'.toString()

@Select("

" select * from `test `.`share_channel_st_info`" +

" where 1 = 1" +

" " +

" " +

" and channel=#{channel}" +

" " +

" " +

" and channel=0" +

" " +

" " +

" " +

" and time >=#{startd}" +

" " +

" and time <=#{endd}" +

" " +

" " +

" order by ${orderby}" +

" " +

" " +

" order by time desc" +

" " +

" " +

" limit #{offset}, #{limit}" +

"")

List getShareChannelStInfo(ShareChannelStInfo info);

二是：加轉(zhuǎn)義實體字符串引號"

三是：外部單雙引號交換：

注意：在xml配置中，使用第三種方式，不需要添加反斜杠("\"),

總結(jié)

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