空指针问题？？？急

2005-04-08 12:54:48 141 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Catia二次开发QueryInterface的操蛋问题探索了很久，尝试录制宏，打开部件属性窗口，然后随意设置一些属性（必须改变一些东西才能录制成功，否则不会录制到任何东西），再看录制的结果，发现原来CATIAAnalyze是从Product那里来的。例如获得一个部件的体积，找到相关接口CATIAAnalyze，但是这个部件的CATIAAnalyze的对象不知道如何获取。总结一下，写Catia二开代码，就像漂亮国那款《莫里秀》又名《爸爸死哪了》的综艺节目，大部分时间都是在找爸爸！Catia二开很痛苦，明明已经找到接口类，但是却不知道怎么获得这个接口类的对象。阅读详情

空指针但是为什么我把我的.jsp and bean paste 出来了帮我看看，谢谢了
java.lang.NullPointerException
myfirstbean.DataOperate.insertSQLCommand(DataOperate.java:96)
org.apache.jsp.register_jsp._jspService(register_jsp.java:87)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

rigister.jsp

<html>
<body>
<%@page language="java"%>
<form method="post" action="insertNews.jsp" enctype="multipart/form-data">
<%@ page import="java.lang.*"%>
<jsp:useBean id="dataOperate" class="myfirstbean.DataOperate"/>
<%
dataOperate.openConnection();

String name,Anonymous,email,descrip,num,cod;
int code,telnumber;

cod=request.getParameter("co");
num=request.getParameter("telnumb");
name=request.getParameter("na");
Anonymous=request.getParameter("Anonymo");
descrip=request.getParameter("descr");
code=Integer.parseInt(cod);
telnumber=Integer.parseInt(num);
email=request.getParameter("ema");

System.out.println(name);
System.out.println(Anonymous);

dataOperate.setName(name);dataOperate.setAnonymous(Anonymous);dataOperate.setCode(code);
dataOperate.setEmail(email);dataOperate.setTel(telnumber);dataOperate.setDescription(descrip);

String inSertCommand="insert into Customer Values('"+dataOperate.getName()+"','"+dataOperate.getAnonymous()+"',"+dataOperate.getCode()+",'"+dataOperate.getEmail()+"',"+dataOperate.getNumber()+",'"+dataOperate.getDescription()+"')";

String execut="inSertCommand ";
dataOperate.insertSQLCommand(execut );

%>
<%out.print("注册成功，恭喜你");%>

</form>
</body>
</html>

package myfirstbean;
import java.sql.*;
public class DataOperate{

Connection theConnection;
Statement theStatement;
ResultSet theResult;

String theDataSource,theUser,thePassword,theName,theAnonymous,
theEmail,description,insertCommand;

int telNumb,theCode;

//设置和获得参数
public void setName(String name){

theName=name;
}
public String getName(){

return theName;

}

public void setAnonymous(String Anonymous){

theAnonymous=Anonymous;
}
public String getAnonymous(){

return theAnonymous;
}

public void setCode(int code){

theCode=code;
}

public int getCode(){

return theCode;

}

public void setEmail(String email){
theEmail=email;
}
public String getEmail(){
return theEmail;
}

public void setTel(int telnumber){
telNumb= telnumber;
}
public int getNumber(){

return telNumb;
}

public void setDescription(String descrip){

description=descrip;

}

public String getDescription(){

return description;

}

static void openConnection(){

theDataSource= "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydata";
theUser="sa";
thePassword=" ";

try{

Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
theConnection=DriverManager.getConnection(theDataSource,theUser,thePassword);
theStatement=theConnection.createStatement();

}catch(Exception e){
e.printStackTrace();
System.out.println("Error Trace in getConnection() : " + e.getMessage());
}

}

static void insertSQLCommand(String inSertCommand){

try{

theResult=theStatement.executeQuery(inSertCommand);
}catch(SQLException e){ e.printStackTrace();
System.out.println("Error Trace in executeQuery() : " + e.getMessage());
}

}

}

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