2 u012503756 u012503756 于 2016.04.23 22:31 提问

用的spring mvc 添加了分页 功能后一直报错 求大神解决

org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver]Resolving exception from handler [com.app.controller.ManageController@185c0de]: java.lang.NumberFormatException: For input string: ""
2016-4-23 22:21:20 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [hnszf] in context with path [/hnszf] threw exception [Request processing failed; nested exception is java.lang.NumberFormatException: For input string: ""] with root cause
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:470)
at java.lang.Integer.parseInt(Integer.java:499)
at com.app.controller.ManageController.forJsp(ManageController.java:183)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:427)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:415)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:788)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:717)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
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.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:318)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)
[org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver]Resolving exception from handler [com.app.controller.ManageController@185c0de]: java.lang.NumberFormatException: For input string: ""
[org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver]Resolving exception from handler [com.app.controller.ManageController@185c0de]: java.lang.NumberFormatException: For input string: ""
[org.springframework.web.servlet.DispatcherServlet]Could not complete request
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:470)
at java.lang.Integer.parseInt(Integer.java:499)
at com.app.controller.ManageController.forJsp(ManageController.java:183)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:427)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:415)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:788)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:717)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
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.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$SocketProcessor.run(JIoEndpoint.java:318)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)

7个回答

u012503756
u012503756   2016.04.24 15:42
已采纳

找到问题了 requesType参数写错 没有请求到控制器

u013321534
u013321534   2016.04.24 01:00

ManageController.java 183行代码贴出来。目测是把空字符转转成数字了,Integer.valueOf("")

u012503756
u012503756 这个都试过了 加了 。trim() 都不行
一年多之前 回复
niaonao
niaonao   Rxr 2016.04.24 11:04

你空字符串 格式化为数字出错。
是不是那个数据接收错误为空
比如int name = Integer.parseInt(rs.getString("id")); id对应的字段不存在,或者大小写错误,为ID,具体你再自己看看

niaonao
niaonao 回复bulidfer: 那好
一年多之前 回复
u012503756
u012503756 分页的参数page.num没有传过去
一年多之前 回复
qq_30168103
qq_30168103   2016.04.23 22:51

好像是当你输入的是“”的时候无法被转换特定的格式吧;看NumberFormat应该是吧。我也是新手答错了,不要打我啊。

u012503756
u012503756   2016.04.23 22:56

试过了 不是这个问题

qq_30715329
qq_30715329   2016.04.24 08:03

格式转换错误,输入了String ,要转换成Integer

niaonao
niaonao   Rxr 2016.04.24 10:58

我博客里写了一个分页你可以对比一下

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