大家好 我的 jsp页面有错误帮忙解决下!!感激不尽!!

Question

org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 11 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:55: 非法的表达式开始
    public LengthCheck(String str,int MinLength,int MaxLength)
    ^
1 错误 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)

Answer 1

没有函数返回类型，没有返回值，就是void型

Answer 2

  没听说过 JSP页面可以 使用  public 修饰符的

Answer 3

你這是jsp頁面？
方法要用function定義
去找本js地書看下吧。。

Answer 4

上面的错误是没有返回值。
一般很少在jsp里面些java代码的，用jstl 和EL表达式比较好！！

Answer 5

同意kingsun521的说法。没有返回值
public boolean LengthCheck(String   str,int   MinLength,int   MaxLength) 

Answer 6

谢谢大家的帮助!
不过还是不行啊!
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 11 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:55: 非法的表达式开始
    Public boolean LengthCheck(String str,int MinLength,int MaxLength)
    ^
1 错误 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)

Answer 7

崩溃了!!大家再帮我看看吧!org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 11 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:55: 不是语句
    Public boolean LengthCheck(String str,int MinLength,int MaxLength)
    ^
An error occurred at line: 11 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:55: 需要 ';'
    Public boolean LengthCheck(String str,int MinLength,int MaxLength)
          ^
2 错误 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)

Answer 8

org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 11 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:55: 非法的表达式开始
    public boolean LengthCheck(String str,int MinLength,int MaxLength)
    ^
1 错误 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)高手9999999火啊!!!着火了!!

Answer 9

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>注册判断</title>
</head><body>  <%
    public boolean LengthCheck(String str,int MinLength,int MaxLength)
    {
        return((str.length>=MinLength)&&(str.length<=MaxLength));
    }
    String UserName=request.getParameter("UserName");
    String NickName=request.getParameter("NickName");
    String Sex=request.getParameter("Sex");
    String Password=request.getParameter("Password");
    String PwdConfirm=request.getParameter("PwdConfirm");
    String Question=request.getParameter("Question");
    String Answer=request.getParameter("Answer");
    String Email=request.getParameter("Email");
    String Error=new String();  %>
  <%
    boolean allOk=true;
    String Number="0123456789";
    for(int i=0;i<UserName.length();i++)
    {
        char temp=UserName.charAt(i);
        if(!((temp>='a'&&temp<='z')||(temp>='A'&&temp<='Z')||(temp=='_')||(temp.indexOf(temp)!=-1)))
        Error+="用户名必须由数字、字母和下划线构成<br>";
        allOk=false;
    }    if(!LengthCheck(UserName,4,20))
    { 
       Error+="请检查用户名长度<br>";
       allOk=false;
    }
    if(NickName.length()==0)
    {
       Error+="请填写昵称<br>";
       NickName="";
       allOk=false;
    }
    if(Sex.equals("男"))
       sex="0";
    else if(Sex.equals("女"))
       sex="1";
    else 
       sex="2";
    if(Password.length()==0)
    {
       Error+="请设置密码<br>";
       Password="";
       allOk=false;
    }
    if(!LengthCheck(Password,6,12))
    {
       Error+="密码长度应该在6-12位间<br>";
       allOk=false;
    }
    if((!LengthCheck(PwdConfirm,6,12))|(!Password.equals(PwdConfirm)))
    {
       Error+="请重新确认密码<br>";
       PwdConfirm="";
       allOk=false;
    }
    if(Question.length()==0)
    {
       Error+="请选择密码提示问题<br>";
       Question="";
       allOk=false;
    }
    if(Answer.length()==0)
    {
       Error+="请填写密码问题答案<br>";
       Answer="";
       allOk=false;
    }
    if(Email.indexOf('@')<=0)
    {
       Error+="邮件地址填写不正确，请重新填写<br>";
       Email="";
       allOk=false;
    }
    if(allOk)
    {    
    UserName=(String)session.getAttribute("UserName");
    NickName=(String)session.getAttribute("NickName");
    Sex=(String)session.getAttribute("Sex");
    Password=(String)session.getAttribute("Password");
    PwdConfirm=(String)session.getAttribute("PwdConfirm");
    Question=(String)session.getAttribute("Question");
    Answer=(String)session.getAttribute("Answer");
    Email=(String)session.getAttribute("Email");
    %>
       <jsp:forward page="reg22.jsp"/>
    <%
    }
    else
{    Error=(String)session.getAttribute("Error");
    %>
       <jsp:forward page="reg_error.jsp"/>
   <% 
}
   %>
</body>
</html>

Answer 10

<%!
       public   boolean   LengthCheck(String   str,int   MinLength,int   MaxLength) 
        { 
                return((str.length> =MinLength)&&(str.length <=MaxLength)); 
        } %>
String   UserName=request.getParameter("UserName"); 
        String   NickName=request.getParameter("NickName"); 
        String   Sex=request.getParameter("Sex"); 
        String   Password=request.getParameter("Password"); 
        String   PwdConfirm=request.getParameter("PwdConfirm"); 
        String   Question=request.getParameter("Question"); 
        String   Answer=request.getParameter("Answer"); 
        String   Email=request.getParameter("Email"); 
        String   Error=new   String();     %> 
    <% 
        boolean   allOk=true; 
        String   Number="0123456789"; 
        for(int   i=0;i <UserName.length();i++) 
        { 
                char   temp=UserName.charAt(i); 
                if(!((temp> ='a'&&temp <='z') ¦ ¦(temp> ='A'&&temp <='Z') ¦ ¦(temp=='_') ¦ ¦(temp.indexOf (temp)!=-1))) 
                Error+="用户名必须由数字、字母和下划线构成 <br> "; 
                allOk=false; 
        }         if(!LengthCheck(UserName,4,20)) 
        {   
              Error+="请检查用户名长度 <br> "; 
              allOk=false; 
        } 
        if(NickName.length()==0) 
        { 
              Error+="请填写昵称 <br> "; 
              NickName=""; 
              allOk=false; 
        } 
        if(Sex.equals("男")) 
              sex="0"; 
        else   if(Sex.equals("女")) 
              sex="1"; 
        else   
              sex="2"; 
        if(Password.length()==0) 
        { 
              Error+="请设置密码 <br> "; 
              Password=""; 
              allOk=false; 
        } 
        if(!LengthCheck(Password,6,12)) 
        { 
              Error+="密码长度应该在6-12位间 <br> "; 
              allOk=false; 
        } 
        if((!LengthCheck(PwdConfirm,6,12)) ¦(!Password.equals(PwdConfirm))) 
        { 
              Error+="请重新确认密码 <br> "; 
              PwdConfirm=""; 
              allOk=false; 
        } 
        if(Question.length()==0) 
        { 
              Error+="请选择密码提示问题 <br> "; 
              Question=""; 
              allOk=false; 
        } 
        if(Answer.length()==0) 
        { 
              Error+="请填写密码问题答案 <br> "; 
              Answer=""; 
              allOk=false; 
        } 
        if(Email.indexOf('@') <=0) 
        { 
              Error+="邮件地址填写不正确，请重新填写 <br> "; 
              Email=""; 
              allOk=false; 
        } 
        if(allOk) 
        {         
        UserName=(String)session.getAttribute("UserName"); 
        NickName=(String)session.getAttribute("NickName"); 
        Sex=(String)session.getAttribute("Sex"); 
        Password=(String)session.getAttribute("Password"); 
        PwdConfirm=(String)session.getAttribute("PwdConfirm"); 
        Question=(String)session.getAttribute("Question"); 
        Answer=(String)session.getAttribute("Answer"); 
        Email=(String)session.getAttribute("Email"); 
        %> 
              <jsp:forward   page="reg22.jsp"/> 
        <% 
        } 
        else 
{         Error=(String)session.getAttribute("Error"); 
        %> 
              <jsp:forward   page="reg_error.jsp"/> 
      <%   
} 
      %> 
</body> 
</html> 

Answer 11

org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 8 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:13: 非法的表达式开始
                return((str.length> =MinLength)&&(str.length <=MaxLength)); 
                                    ^
An error occurred at line: 8 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:13: 需要 ')'
                return((str.length> =MinLength)&&(str.length <=MaxLength)); 
                                                                          ^
An error occurred at line: 24 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:74: 非法的表达式开始
                if(!((temp> ='a'&&temp <='z') | |(temp> ='A'&&temp <='Z') | |(temp=='_') | |(temp.indexOf 
                            ^
An error occurred at line: 24 in the jsp file: /reg_action.jsp
Generated servlet error:
D:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\reg\org\apache\jsp\reg_005faction_jsp.java:77: 需要 ')'
                Error+="???§??±???????×???×??????????????? <br> "; 
                                                                 ^
4 错误 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)
各位哥哥姐姐们帮帮忙啊!

Answer 12

我把你的jsp页面做了修正，你看下，应该没有问题了，需要注意的是jsp里内部方法应该用 <%!    %>来包含，不是<%  %>
还有改的时候，你的(temp.indexOf(temp)!=-1)这个判断写的是错的，char没有这个方法，你自己看下怎么改
另外就是建议你用有插件的开发环境，好多错误是可以提示出来的，比如定义Sex，用sex。。
<head>
<meta http-equiv="Content-Type" content="text/html;   charset=gb2312">
<title>注册判断</title>
</head>
<body>
<%!
boolean LengthCheck(String str,int MinLength, int MaxLength)
        {
                return ((str.length()>=MinLength)&&(str.length() <=MaxLength));
        }
    %>
<%
String   UserName=request.getParameter("UserName");
String   NickName=request.getParameter("NickName");
String   Sex=request.getParameter("Sex");
String   Password=request.getParameter("Password");
String   PwdConfirm=request.getParameter("PwdConfirm");
String   Question=request.getParameter("Question");
String   Answer=request.getParameter("Answer");
String   Email=request.getParameter("Email");
String   Error=new   String();        boolean   allOk=true;
        String   Number="0123456789";
        for(int   i=0;i <UserName.length();i++)
        {
                char   temp=UserName.charAt(i);
                // del (temp.indexOf(temp)!=-1)
                if(!((temp>='a' && temp <='z') ||(temp>='A' && temp <='Z') ||(temp=='_') )){
                Error+="用户名必须由数字、字母和下划线构成 <br> ";
                allOk=false;
                }
        }        if(!LengthCheck(UserName,4,20))
        {  
              Error+="请检查用户名长度 <br> ";
              allOk=false;
        }
        if(NickName.length()==0)
        {
              Error+="请填写昵称 <br> ";
              NickName="";
              allOk=false;
        }
        if(Sex.equals("男"))
            Sex="0";
        else   if(Sex.equals("女"))
            Sex="1";
        else  
            Sex="2";
        if(Password.length()==0)
        {
              Error+="请设置密码 <br> ";
              Password="";
              allOk=false;
        }
        if(!LengthCheck(Password,6,12))
        {
              Error+="密码长度应该在6-12位间 <br> ";
              allOk=false;
        }
        if((!LengthCheck(PwdConfirm,6,12)) | (!Password.equals(PwdConfirm)))
        {
              Error+="请重新确认密码 <br> ";
              PwdConfirm="";
              allOk=false;
        }
        if(Question.length()==0)
        {
              Error+="请选择密码提示问题 <br> ";
              Question="";
              allOk=false;
        }
        if(Answer.length()==0)
        {
              Error+="请填写密码问题答案 <br> ";
              Answer="";
              allOk=false;
        }
        if(Email.indexOf('@') <=0)
        {
              Error+="邮件地址填写不正确，请重新填写 <br> ";
              Email="";
              allOk=false;
        }
        if(allOk)
        {        
        UserName=(String)session.getAttribute("UserName");
        NickName=(String)session.getAttribute("NickName");
        Sex=(String)session.getAttribute("Sex");
        Password=(String)session.getAttribute("Password");
        PwdConfirm=(String)session.getAttribute("PwdConfirm");
        Question=(String)session.getAttribute("Question");
        Answer=(String)session.getAttribute("Answer");
        Email=(String)session.getAttribute("Email");
        %>
<jsp:forward page="reg22.jsp" />
<%
        }
        else
{         Error=(String)session.getAttribute("Error");
        %>
<jsp:forward page="reg_error.jsp" />
<%  
}
      %>
</body>
</html>