offset (0) + length (4) exceed the capacity of the array: 2

 使用spring-for-hadoop读取HBase，出现以下错误：

主要原因是：我自己定义的dto采用了Float，而从数据库取数据的时候，采用了Bytes.toFloat方法对数据进行转换，查看源码，可知道Bytes.toFloat返回的是基本类型float，两者类型不符合，导致出现错误，使用以下方法进行数据转换即可：Float.valueof(Bytes.toString())即可。

java.lang.IllegalArgumentException: offset (0) + length (4) exceed the capacity of the array: 2
	at org.apache.hadoop.hbase.util.Bytes.explainWrongLengthOrOffset(Bytes.java:629)
	at org.apache.hadoop.hbase.util.Bytes.toInt(Bytes.java:799)
	at org.apache.hadoop.hbase.util.Bytes.toFloat(Bytes.java:691)
	at org.apache.hadoop.hbase.util.Bytes.toFloat(Bytes.java:681)
	at com.qxj.data.dao.impl.SpringHbaseTestDaoImpl$2.mapRow(SpringHbaseTestDaoImpl.java:85)
	at com.qxj.data.dao.impl.SpringHbaseTestDaoImpl$2.mapRow(SpringHbaseTestDaoImpl.java:67)
	at org.springframework.data.hadoop.hbase.HbaseTemplate$2.doInTable(HbaseTemplate.java:188)
	at org.springframework.data.hadoop.hbase.HbaseTemplate.execute(HbaseTemplate.java:61)
	at org.springframework.data.hadoop.hbase.HbaseTemplate.get(HbaseTemplate.java:173)
	at org.springframework.data.hadoop.hbase.HbaseTemplate.get(HbaseTemplate.java:168)
	at com.qxj.data.dao.impl.SpringHbaseTestDaoImpl.getSinglePlane(SpringHbaseTestDaoImpl.java:65)
	at com.qxj.data.service.impl.HbaseServiceImpl.getSinglePlane(HbaseServiceImpl.java:31)
	at com.qxj.data.controller.HbaseContoller.getSinglePlane(HbaseContoller.java:51)
	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:205)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:407)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)