Question

JDBC空指针错误。在访问数据库时。这是我正在执行的查询。

"INSERT INTO paritosh ( customer, contactPerson, mobileNo, phoneNo, emailId, chairman, instituteName, totalEmployees, totalFaculty, totalStudents, totalClassroom, address, state, revenue, clientRate, acceptedRate, valuePerCard, rating, finderName, finderFee, comments ) VALUES ('kinley', 'adfa' , '232131' , '2323' , '@gmail' , 'adfadf' , 'zxc' ,100,11,1000,30, 'dfdfa' , 'Delhi' , 66000,60000,60000,600, 'Hot' , 'tyu' , 8, 'dfadfadfasdf');"

如果我在访问中执行代码作为sql查询，则查询运行良好.....

请帮忙

JDBC代码如下：

String insertq="INSERT INTO paritosh ( customer, contactPerson, mobileNo, phoneNo, emailId, chairman, instituteName, totalEmployees, totalFaculty, totalStudents, totalClassroom, address, state, revenue, clientRate, acceptedRate, valuePerCard, rating, finderName, finderFee, comments )";

String query=" VALUES ('"+customer+"', '"+contact+"' , '"+mobile+"' , '"+phone+"' , '"+email+"' , '"+chairman+"' , '"+institute+"' ,"+totalEmployees+","+totalFaculty+","+totalStudents+","+classroom+", '"+address+"' , '"+state+"' , "+revenue+","+clientRate+","+accepRate+","+valPercard+", '"+Rating+"' , '"+finderName+"' , "+finderFee+", '"+comment+"');";
     String build=insertq+query;

String query2="INSERT INTO paritosh ( customer, contactPerson, mobileNo, phoneNo, emailId, chairman, instituteName, totalEmployees, totalFaculty, totalStudents, totalClassroom, address, state, revenue, clientRate, acceptedRate, valuePerCard, rating, finderName, finderFee, comments ) VALUES ('virappan', 'dussal' , '4269887' , '12334567' , 'kumar@ril.com' , 'kumar' , 'RMIT' ,300,120,3000,150, 'adfad' , 'Delhi' , 400000,380000,390000,1500, 'Hot' , 'vineet' , 9, 'afddf');"; 

try{   
  s.execute(build);  
}
catch(SQLException se)
{   
  System.out.println("SQL eception");  
}
catch(Exception e)
{
    System.out.println(e);
    System.out.println(" error after running the query");
}

Answer 1

查看您的代码，我建议您考虑使用PreparedStatement而不是您正在使用的方式。
确保在调用execute()方法之前已设置连接。请注意，这仅基于您提供的内容。如果您希望我们查看您的整体代码并帮助您，请考虑发布SSCCE。

JDBC和MS-Access空指针

1 个答案: