我将值从JSP传递到java类以将其存储在Database中。它为Jsp中的Contact No.值提供NumberFormatException。我无法弄清楚为什么会这样。对于从Jsp传递给Java类的Contact No.值，java类中从字符串到整数的解析以某种方式失败。
JSP
<%@page import="register.register"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>PenguinSoft(India)</title>
<meta name="keywords" content="" />
<meta name="description" content="" />
<link href="default.css" rel="stylesheet" type="text/css" />
</head>
<body>
<%
String stdname = request.getParameter("student");
String batch = request.getParameter("batch");
String email = request.getParameter("email");
String contact = request.getParameter("contact");
String fees=request.getParameter("fees");
if(stdname!=null && batch!=null && email!=null && contact!=null && fees!=null)
{
register objadd = new register();
boolean flag=objadd.InsertNew(stdname,batch,email,contact,fees);
if(flag)
{
System.out.println("Yes");
}
}
%>
<form action="Register.jsp" method="POST">
<div id="header">
<div id="logo">
<h1><a href="#"></a></h1>
<h3><a href="#">PenguinSoft</a></h3>
</div>
<div id="menu">
<ul>
<li class="first"><a href="#" title="">New Batch</a></li>
<li><a href="Login.jsp" title="">Register Student</a></li>
<li><a href="AddEmployeeData.jsp" title="">Fees Record</a></li>
<li><a href="AddKeywords.jsp" title="">Manage Student</a></li>
<li><a href="StopWordDetectionForm.jsp" title="">All Details</a></li>
</ul>
</div>
<div id="ad468x60"><a href="#"><img src="images/spam1.gif" alt="" width="468" height="60" /></a></div>
</div>
<div id="page">
<div id="content">
<div class="boxed">
<h1 class="heading">Welcome to SPAM Management</h1>
<div class="content">
<img src="images/no-spam-2x.gif" alt="" width="122" height="123" class="left" />
<p></p>
<p></p>
<blockquote>
<p align="left"><font size="3">Student Name
</font>
<input type="text" name="student" size="26" style="font-family: Tahoma; font-size: 10pt" onBlur="return one(this.form)"/></p>
<p align="left"><font size="3">Batch<select name="batch">
<option>Java</option>
<option>PHP</option>
<option>Framework</option>
<option>Android</option>
</select>
</font>
</p>
<p align="left"><font size="3">Email ID
</font>
<input type="text" name="email" size="26" style="font-family: Tahoma; font-size: 10pt" onBlur="return one(this.form)"/></p>
<p align="left"><font size="3">Contact No.
</font>
<input type="text" name="contact" size="26" style="font-family: Tahoma; font-size: 10pt" onBlur="return one(this.form)"/></p>
<p align="left"><font size="3">Fees
</font>
<input type="text" name="fees" size="26" style="font-family: Tahoma; font-size: 10pt" onBlur="return one(this.form)"/></p>
<p align="left">
</p><br>
<input type="submit" value="Register Student"name="submit" align="center"/>
</form>
</div>
</div>
</div>
<!-- end #content -->
<div id="sidebar">
<div class="boxed">
<h2 class="heading">Key Features: </h2>
<div class="content">
<ul>
<li>PenguinSoft(India) is one of the major leading training institute in Software Development in India.</li>
<li>Training provided in Java,PHP,Android,database,etc</li>
<li>Live project development is also provided</li>
</ul>
</div>
</div>
</div>
<!-- end #sidebar -->
</div>
<!-- end #page -->
<div style="clear: both;"> </div>
<div id="footer">
<p id="legal">Copyright © PenguinSoft(India) All Rights Reserved.</p>
<p id="links"><a href="#">Privacy Policy</a> | <a href="#">Terms of Use</a></p>*/
</div>
</body>
</html>
Java类
package register;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author asus
*/
public class register {
public boolean InsertNew(String stdname,String stdbatch,String email,String contact,String fees){
boolean flag = false;
Connection con = null;
String connectionURL = "jdbc:mysql://localhost:3306/penguinsoft";
Connection connection = null;
ResultSet rs;
try {
// Load the database driver
Class.forName("com.mysql.jdbc.Driver");
// Get a Connection to the database
connection = DriverManager.getConnection(connectionURL, "root", "");
//Add the data into the database
//String sql = "insert into sample values(?,?)";
int stdcontact=Integer.parseInt(contact);
int stdfees=Integer.parseInt(fees);
PreparedStatement pst = connection.prepareStatement("INSERT into alldetails VALUES(?,?,?,?,?,?)");
pst.setString(1,null);
pst.setString(2,stdname);
pst.setString(3,email);
pst.setInt(4,stdcontact);
pst.setString(5,stdbatch);
pst.setInt(6,stdfees);
int numRowsChanged = pst.executeUpdate();
if(numRowsChanged!=0){
System.err.println("Successfull execution");
}
else{
System.err.println("Problem with the insertion query");
}
pst.close();
}
catch(ClassNotFoundException e){
e.printStackTrace();
}
catch(SQLException e){
e.printStackTrace();
}
catch(NumberFormatException nfe)
{
nfe.printStackTrace();
}
catch (Exception e){
e.printStackTrace();
}
finally {
// Always close the database connection.
try {
if (connection != null) connection.close();
}
catch (SQLException ignored){
}
}
return true;
}
}
错误：
java.lang.NumberFormatException: For input string: "12345678"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:495)
at java.lang.Integer.parseInt(Integer.java:527)
at register.register.InsertNew(register.java:37)
at org.apache.jsp.Register_jsp._jspService(Register_jsp.java:89)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
答案 0 :(得分：0)
这可能是由于字符串中的一些垃圾/特殊字符造成的。尝试做
Integer.parseInt(source.trim());
而不仅仅是
Integer.parseInt(source);
答案 1 :(得分：0)
看起来像char编码问题。
你可以尝试的一项工作是
String cleanString = new String(myNum.trim().getBytes("UTF-8"));
int stdcontact=Integer.parseInt(cleanString);
答案 2 :(得分：0)
试
long stdcontact=Long.parseLong(contact);
contactno超出了32位int的范围。