帮我解一下吧，我都郁闷了好几天了，找不出什么原因？

chen980347 2004-09-20 10:48:35

<%@ page language="java" contentTpye="text/html;charset=gb2312"%>
<%@ page info="a hello word example"%>
<html>
<head>
<title>理解JSP原理</title>
</head>
<body>
<center>
<h1>
<%
int times=Integer.parsetInt(request.getParameter("times"));
for(int i=0;i<times;i++)
{
out.println("hello world");
out.println("<br>");
}
%>
</h1>
</center>
</body>
</html>

在用jbulider编译时一直提示：没找到java.lang.Integer这个类呢？
且错误一直在int times=Integer.parsetInt(request.getParameter("times")); 这行上
不知道为什么？能说一下吗？

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切换为时间正序

当前发帖距今超过3年，不再开放新的回复

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chen980347 2004-09-22

谢谢，这个问题解决了，大家帮我解决另一个吧，不好意思`-`…
http://community.csdn.net/Expert/topic/3388/3388762.xml?temp=.5028955（这个问题我问了好久没有解决）

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yu365 2004-09-22

没有取得times的值，是null，所以就报你上面的错误了

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wenlong1045 2004-09-22

同意你应该有两个页面吧
request取得的应该是另一个页面输入的信息

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disizhishou 2004-09-22

明显request.getParameter("times")得到的是null嘛，编译器错误提示都这么明显了。

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gundam_king 2004-09-22

你自己先看看String a=request.getParameter("times")得到的是什么

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真不知道是谁 2004-09-22

try{
int times=Integer.parsetInt(request.getParameter("times"));
}catch(Exception e){
e.printStackTrace();
}

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chen980347 2004-09-22

我按各位大虾说的做了，提示如下（用JBulider）:
Apache Tomcat/4.0.6 - HTTP Status 500 - Internal Server Errortype Exception reportmessage Internal Server Errordescription The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.exception java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:394)
at java.lang.Integer.parseInt(Integer.java:476)
at org.apache.jsp.chen1$jsp._jspService(chen1$jsp.java:68)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
at java.lang.Thread.run(Thread.java:536)

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july_typhoon 2004-09-20

parsetInt是笔误？parseInt（）

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july_typhoon 2004-09-20

java.lang包里面的类是核心类，jvm会自动去找的。request.getParameter("times")得到的是啥东西？必须是整数型的字符串，如“1234”，而“12sd”就不行了。

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奇伢 2004-09-20

int times=Integer.parsetInt(request.getParameter("times"));
这句改为
int times=java.lang.Integer.parsetInt(request.getParameter("times"));

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guestman 2004-09-20

将这句：
<%@ page language="java" contentTpye="text/html;charset=gb2312"%>
改为
<%@ page language="java" contentType="text/html;charset=gb2312"%>

其中的contentTpye——》contentType

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