JAVA楂樻墜杩?..鐪嬬湅绋嬪簭鏈夋病鏈夐敊鍟?..

<%@ page contentType="text/html; charset=gb2312" language="java"%>
<%@ page import="java.util.*"%>
<html>
<head>
<title>璁＄畻涓夎褰㈤潰绉?
</title>
</head>
<body>
<P>璇疯緭鍏ヤ笁涓竟鐨勯暱搴?<BR>
<FORM NAME="form" Method="get" action="triangle.jsp">
<p>
<InPut type="text" name="num1">
</p>
<p>
<input type="text" name="num2">
</p>
<p>
<input type="text" name="num3">
</p>
<p>
<input type="submit" value="璁＄畻">
</p>
</FORM>
<%! double a,b,c;
    String strA,strB,strC;
    String answer;
    double result;
%>
<% if(request.getParameter("submit")!=null){
strA=request.getParameter("numl");
strB=request.getParameter("num2");
strC=request.getParameter("num3");
try{
a=Double.valueOf(strA);
b=Double.valueOf(strB);
c=Double.valueOf(strC);
}
catch(NumberFormatExceptionexc){
out.println("<BR>"+"璇疯緭鍏ユ暟瀛楀瓧绗?);
  if((a+b)>c&&(a+c)>b&&(b+c)>a){
   double p=(a+b+c)/2;
   result=Math.sqrt(p*(p-a)*(p-b)*(p-c));
   out.println("闈㈢Н涓?"+result);
  }
  else{
   answer="鎮ㄨ緭鍏ョ殑涓夎竟涓嶈兘澶熸垚涓夎褰?;
   out.print("<BR>"+answer);
  }
}
%>
</body>
</html>

鎴戝湪鍦板潃鏍忚緭鍏ttp://localhost:8080/triangle.jsp  鎵ц鍚庢湁4閿?nbsp;.涓嶇煡閿欏摢閲?鏄笉鏄病璁惧ソ鐜鍙橀噺,浣嗘槸涓婚〉浼氬嚭鏉?.

涓婇潰鐨勯敊璇嗕俊鎭槸:
type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 29 in the jsp file: /triangle.jsp
Generated servlet error:
C:\Tomcat\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\triangle_jsp.java:82: 闇€瑕?nbsp;<鏍囪瘑绗?gt;
catch(NumberFormatExceptionexc){
                                      ^

An error occurred at line: 50 in the jsp file: /triangle.jsp
Generated servlet error:
C:\Tomcat\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\triangle_jsp.java:95: 闇€瑕?nbsp;')'
      out.write("\r\n");
                       ^

Generated servlet error:
C:\Tomcat\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\triangle_jsp.java:36: "try" 涓嶅甫鏈?nbsp;"catch" 鎴?nbsp;"finally"
    try {
    ^

Generated servlet error:
C:\Tomcat\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\triangle_jsp.java:110: 闇€瑕?nbsp;'}'
^
4 閿欒

org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:412)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

17 涓В鍐虫柟妗?/h2>

#1

鍏堝姞涓獇鍐嶈锛屼綘浠旂粏鐪嬬湅锛屾病鏈夎窡if鍖归厤鐨剗

#2

NumberFormatException exc

鏀瑰畬浜嗚繖涓叾浠栫殑閿欏簲璇ヤ篃浼氭病鏈変簡

BTW:杩欎笉鏄粈涔堥珮鎵嬮棶棰?鍐橨ava瑕佸浼氱湅閿欒淇℃伅

#3

纭疄..

#4

妤间富鐨刯sp鏄墜鍐欑殑鍚э紝寤鸿鐢ㄤ釜甯︽牸寮忓寲鐨勭紪杈戝櫒鎴栬€匢DE鍐欏惂锛屽湪閭ｉ噷闈㈠啓鏍煎紡姣旇緝鏈変繚璇侊紝瑕佷笉jsp寰堜贡锛岃繕瀹规槗鍑洪敊

#5

#6

鍔犱簡}杩樻槸鏈夐敊鍟?.

#7

鍟婂摝锛屾墜鍐檍sp寰堝ソ锛屽彲灏辨€曞啓閿欏崟璇嶃€佸皯鍔犲ぇ鎷彿....... 鎵€浠ヨ繕鏄敤IDE鐨勫ソ

#8

鏄墜鍔ㄧ殑

#9

5妤煎お鍚婁簡...宸茬粡濂戒簡,
鎴戝埌搴曞摢閿欎簡 ..鍟?

#10

2妤煎厛鎵惧埌閿欑殑

#11

寮曠敤 9 妤?nbsp;choosehappen 鐨勫洖澶?

5妤煎お鍚婁簡...宸茬粡濂戒簡,
鎴戝埌搴曞摢閿欎簡 ..鍟?

涓嶆槸璺熶綘璇撮敊璇簡涔?

#12

杈撳叆浜嗕笁杈瑰緱涓嶅埌闈㈢Н鍟? .甯垜鐪嬬湅鍟?

#13

绠椾簡,鎴戞潵瑙ｅ喅..

#14

涓嬮潰杩欒浠ｇ爜閿欎簡锛?
catch(NumberFormatExceptionexc){
娌℃湁鍙傛暟鍟?nbsp;

杩樻湁灏辨槸鎯虫彁閱掍竴涓媗z鍦ㄥ啓html浠ｇ爜鐨勬椂鍊欙紝鏈€濂借繕鏄敤鏍囧噯鐨勬牸寮?nbsp;

鍏ㄩ儴鐢ㄥ皬鍐欏惂浣犱竴浼氱敤澶у啓鐨勬爣绛?nbsp;涓€浼氬張鐢ㄥ皬鍐欑殑

鐪嬪埌寰堟槸涓嶇埥鍝?

#15

寮曠敤 14 妤?nbsp;songjun37 鐨勫洖澶?

涓嬮潰杩欒浠ｇ爜閿欎簡锛?nbsp;
catch(NumberFormatExceptionexc){
娌℃湁鍙傛暟鍟?nbsp;

杩樻湁灏辨槸鎯虫彁閱掍竴涓媗z鍦ㄥ啓html浠ｇ爜鐨勬椂鍊欙紝鏈€濂借繕鏄敤鏍囧噯鐨勬牸寮?nbsp;

鍏ㄩ儴鐢ㄥ皬鍐欏惂浣犱竴浼氱敤澶у啓鐨勬爣绛?nbsp;涓€浼氬張鐢ㄥ皬鍐欑殑

鐪嬪埌寰堟槸涓嶇埥鍝?

#16

寮曠敤 12 妤?nbsp;choosehappen 鐨勫洖澶?

杈撳叆浜嗕笁杈瑰緱涓嶅埌闈㈢Н鍟? .甯垜鐪嬬湅鍟?

浣犵殑浠ｇ爜鐨剗鍐欑殑鏈夐棶棰?鍦╟atch璇彞閲岃〃绀哄嚭鐜板紓甯告墠浼氭墽琛岀殑浠ｇ爜娈?鑰屼綘鎶婃暣涓绠楅潰绉殑浠ｇ爜閮藉湀鍦ㄩ噷闈簡.



<%@ page contentType="text/html; charset=gb2312" language="java"%> 

<%@ page import="java.util.*"%> 

<html> 

<head> 

<title>璁＄畻涓夎褰㈤潰绉?nbsp;

</title> 

</head> 

<body> 

<P>璇疯緭鍏ヤ笁涓竟鐨勯暱搴? <BR> 

<FORM NAME="form" Method="get" action="triangle.jsp"> 

<p> 

<InPut type="text" name="num1"> 

</p> 

<p> 

<input type="text" name="num2"> 

</p> 

<p> 

<input type="text" name="num3"> 

</p> 

<p> 

<input type="submit" value="璁＄畻"> 

</p> 

</FORM> 

<%! double a,b,c; 

    String strA,strB,strC; 

    String answer; 

    double result; 

%> 


<% 

if(request.getParameter("submit")!=null){ 

strA=request.getParameter("numl"); 

strB=request.getParameter("num2"); 

strC=request.getParameter("num3"); 

try{ 

a=Double.valueOf(strA); 

b=Double.valueOf(strB); 

c=Double.valueOf(strC); 

}catch(NumberFormatException exc){ 

  out.println(" <BR>"+"璇疯緭鍏ユ暟瀛楀瓧绗?); 

}

  if((a+b)>c&&(a+c)>b&&(b+c)>a){ 

  double p=(a+b+c)/2; 

  result=Math.sqrt(p*(p-a)*(p-b)*(p-c)); 

  out.println("闈㈢Н涓?"+result); 

  } else{ 

  answer="鎮ㄨ緭鍏ョ殑涓夎竟涓嶈兘澶熸垚涓夎褰?; 

  out.print(" <BR>"+answer); 

  } 

} 

 

%> 

</body> 

</html>

#17

杩欓敊鎴戜篃鍙戠幇浜?浣嗚繕鏈変簺闂,
鎴戣緭鍏ヤ笁杈?,4,5 鐒跺悗灏辨槸闈㈢Н涓嶄細杈撳埌娴忚鍣ㄤ腑.鐪嬩笉鍒伴潰绉€?

#1

鍏堝姞涓獇鍐嶈锛屼綘浠旂粏鐪嬬湅锛屾病鏈夎窡if鍖归厤鐨剗

#2

NumberFormatException exc

鏀瑰畬浜嗚繖涓叾浠栫殑閿欏簲璇ヤ篃浼氭病鏈変簡

BTW:杩欎笉鏄粈涔堥珮鎵嬮棶棰?鍐橨ava瑕佸浼氱湅閿欒淇℃伅

#3

纭疄..

#4

#5

#6

鍔犱簡}杩樻槸鏈夐敊鍟?.

#7

鍟婂摝锛屾墜鍐檍sp寰堝ソ锛屽彲灏辨€曞啓閿欏崟璇嶃€佸皯鍔犲ぇ鎷彿....... 鎵€浠ヨ繕鏄敤IDE鐨勫ソ

#8

鏄墜鍔ㄧ殑

#9

5妤煎お鍚婁簡...宸茬粡濂戒簡,
鎴戝埌搴曞摢閿欎簡 ..鍟?

#10

2妤煎厛鎵惧埌閿欑殑

#11

寮曠敤 9 妤?nbsp;choosehappen 鐨勫洖澶?

5妤煎お鍚婁簡...宸茬粡濂戒簡,
鎴戝埌搴曞摢閿欎簡 ..鍟?

涓嶆槸璺熶綘璇撮敊璇簡涔?

#12

杈撳叆浜嗕笁杈瑰緱涓嶅埌闈㈢Н鍟? .甯垜鐪嬬湅鍟?

#13

绠椾簡,鎴戞潵瑙ｅ喅..

#14

#15

寮曠敤 14 妤?nbsp;songjun37 鐨勫洖澶?

涓嬮潰杩欒浠ｇ爜閿欎簡锛?nbsp;
catch(NumberFormatExceptionexc){
娌℃湁鍙傛暟鍟?nbsp;

杩樻湁灏辨槸鎯虫彁閱掍竴涓媗z鍦ㄥ啓html浠ｇ爜鐨勬椂鍊欙紝鏈€濂借繕鏄敤鏍囧噯鐨勬牸寮?nbsp;

鍏ㄩ儴鐢ㄥ皬鍐欏惂浣犱竴浼氱敤澶у啓鐨勬爣绛?nbsp;涓€浼氬張鐢ㄥ皬鍐欑殑

鐪嬪埌寰堟槸涓嶇埥鍝?

#16

寮曠敤 12 妤?nbsp;choosehappen 鐨勫洖澶?

杈撳叆浜嗕笁杈瑰緱涓嶅埌闈㈢Н鍟? .甯垜鐪嬬湅鍟?



<%@ page contentType="text/html; charset=gb2312" language="java"%> 

<%@ page import="java.util.*"%> 

<html> 

<head> 

<title>璁＄畻涓夎褰㈤潰绉?nbsp;

</title> 

</head> 

<body> 

<P>璇疯緭鍏ヤ笁涓竟鐨勯暱搴? <BR> 

<FORM NAME="form" Method="get" action="triangle.jsp"> 

<p> 

<InPut type="text" name="num1"> 

</p> 

<p> 

<input type="text" name="num2"> 

</p> 

<p> 

<input type="text" name="num3"> 

</p> 

<p> 

<input type="submit" value="璁＄畻"> 

</p> 

</FORM> 

<%! double a,b,c; 

    String strA,strB,strC; 

    String answer; 

    double result; 

%> 


<% 

if(request.getParameter("submit")!=null){ 

strA=request.getParameter("numl"); 

strB=request.getParameter("num2"); 

strC=request.getParameter("num3"); 

try{ 

a=Double.valueOf(strA); 

b=Double.valueOf(strB); 

c=Double.valueOf(strC); 

}catch(NumberFormatException exc){ 

  out.println(" <BR>"+"璇疯緭鍏ユ暟瀛楀瓧绗?); 

}

  if((a+b)>c&&(a+c)>b&&(b+c)>a){ 

  double p=(a+b+c)/2; 

  result=Math.sqrt(p*(p-a)*(p-b)*(p-c)); 

  out.println("闈㈢Н涓?"+result); 

  } else{ 

  answer="鎮ㄨ緭鍏ョ殑涓夎竟涓嶈兘澶熸垚涓夎褰?; 

  out.print(" <BR>"+answer); 

  } 

} 

 

%> 

</body> 

</html>

#17

杩欓敊鎴戜篃鍙戠幇浜?浣嗚繕鏈変簺闂,
鎴戣緭鍏ヤ笁杈?,4,5 鐒跺悗灏辨槸闈㈢Н涓嶄細杈撳埌娴忚鍣ㄤ腑.鐪嬩笉鍒伴潰绉€?

秒客网

JAVA楂樻墜杩?..鐪嬬湅绋嬪簭鏈夋病鏈夐敊鍟?..

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